Selected
Publications in Last 8 Years
Students/Staff
Supervised for Last 8 Years
Useful
Links for CFD Researchers
1. Modelling of Hypothermia and Circulatory Arrest
2. Burn Physiological Simulation and Therapy
3. Investigation and Analysis of Stall Flutter Using CFD Code Prediction
4. Unsteady Biofluid/Structure Interaction
SELECTED RESEARCH AND CONSULTANCY
PROJECTS
(more to be updated)
|
Project Titles |
Sources of Funding* |
Duration |
|
Forced Response Prediction to Turbomachinery Blade Rows in a Multistage Environment |
RSAF External Funding |
1996-1997 |
|
F404 Jet Engine Performance Simulation |
RSAF External Funding |
1998-2000 |
|
Numerical Simulation of Flow and Heat Transfer in Micro-channels |
Mindef External Funding |
1996-1998 |
|
Study of Compressor Stall Margin due to the Distorted Inlet Flow Propagation |
RSAF, Pratt & Whitney External Funding |
2001-2003 |
|
Non-invasive Indices for Cardiac Dysfunction During Filling & Systolic Ejection |
School Strategy Fund, |
2002-2003 |
|
Breast Tumour Detection by Thermography |
Applied Research Fund & S'pore Gen. Hospital |
1999-2001 |
|
National Aerospace Technology Programme (Blade Tip Profile Generation Module) |
PSB (Consultancy) |
1997-1998 |
* RSAF:
PSB:
Productivity Standard
SELECTED PUBLICATIONS DURING THE LAST 10 YEARS
(Classified according to the area of interests; 'in-press' means accepted, to be updated soon)
- Turbomachinery Flow Simulation
Ng, E. Y-K. "Cascade Flow Calculations by a
Navier-Stokes Implicit Finite-Volume Method", International Journal of
Computational Fluid Dynamics, Vol. 3, No: 2,
Ng, E. Y-K. "Numerical Prediction of 3-D Incompressible Viscous
Flow Through Turbomachinery", International
Journal of Computational Fluid Dynamics, Vol. 4, No: 3,
Ng, E. Y-K. and Miao Y. "Viscous Flow Prediction of the Single
Stage Axial Rotating Machineries", International Journal of
Computational Fluid Dynamics, Vol. 5, No: 3,
Ng, E. Y-K. "Prediction of 3-D Viscous Flow of Centrifugal
Impeller with Tip-clearance: Part 1 – High Speed Compressor", ASME Paper
No: GT-AA97T01-02, ASME ASIA’97 Congress & Exhibition,
Ng, E. Y-K. "Prediction of 3-D Viscous Flow of Centrifugal
Impeller with Tip-clearance: Part 2 – Mixed-Flow Water Pump", ASME Paper
No: GT-AA97T01-14, ASME ASIA’97
Ng, E. Y-K "Comparison
Between the Calculated 3-D Flow in Centrifugal Compressor with Measurement",
Proceedings of the 10th International Conference on Numerical Methods for
Laminar and Turbulent Flow, , Vol. 10, Pineridge Press, (Editors: C. Taylor
& J.T. Cross),
Ng, E. Y-K. "Calculation of Tip Leakage Flow through
Turbomachinery Blade Rows for Enhanced Aerodynamic Studies",
International Journal of Computational Fluid Dynamics, Vol. 6, No: 3,
Sreeyasunath, S. and Ng, E. Y-K. "Prediction of High Pressure Axial Compressor Stage Flow using a
Circumferential Average Approach", ASME Paper No: GT-AA97T01-03,
ASME ASIA’97 Congress & Exhibition,
Ng, E. Y-K. and Miao Y. "Computation of Q3D Viscous Flows in
Various Annular Turbine Stage with Heat Transfer", International Journal of
Rotating Machinery, Vol. 4, No: 1, Gordon And Breach Science Publishers,
Tan S.T and Ng, E. Y-K. "Numerical Investigation on
Turbomachinery Flow Fields using Different Turbulence Models", International
Journal of Computer Applications in Technology, Vol. 11, Nos
Ng E.Y.K., Zhou W.D., and Chan W.K. "Non-Newtonian Effects on Mixed-Flow Water Pump Using CFD Approach", Proceedings of the XIX IAHR Symposium, Section on Hydraulic Machinery and Cavitation, Vol. II, World Scientific, Singapore, (1998), Pp. 734-748.
Ng, E. Y-K. "Various Speeds Flow Simulation through 3D Rotating Machinery Stages", International Journal of Computer Modeling and Simulation in Engineering, Vol. 3, No: 4, Sage Science Press, (Nov. 1998), Pp. 253 -- 261.
Ng, E. Y-K. and S.T. Tan "Comparison of Various Turbulence
Models in Rotating Machinery Blade-to-Blade Passages", International
Journal of Rotating Machinery, Vol. 6, No: 5, Gordon and Breach Science
Publishers,
Ng, E. Y-K. and Kwang M.H. "Turbomachinery Flow with No Free Parameter, Non-oscillatory, Dissipative Scheme", International Journal of Progress in CFD, Vol. 1, No. 4, Switzerland, (2001), Pp. 159 -- 158.
Ng, E. Y-K.,
Tan H.Y., Ng, E. Y-K., Lim H.N. and Choi, D, "An improved
turbulence model with Cabot’s Near-wall Function", 3-6 June 2002
ASME-IGTI Conference, Paper no: GT2002-30679 ("Turbomachinery CFD and
Design System"),
Ng, E. Y-K., Tan H.Y., Lim H.N. and Choi, D, "Near Wall Considerations in Turbulence Model", Proceedings of the 4th International Conference on Advances in Fluid Mechanics, Vol. 32, 15-17 May 2002, Ghent, Belgium Pp. 641-650. WIT Press.
Ng, E. Y-K., Liu, N. Y. and Ang , C.H. “A Multi-coefficient Slip
Model for Ultra-thin Gas Film Lubrication”, International Journal of
Computational Engineering Science, Special Issue on MEMs, Vol. 4, No: 2,
Ng, E. Y-K., Liu N.Y. and Tan, S.Y., “Parametric study of Greitzer's instability flow model through compressor system using Taguchi method”, International Journal of Rotating Machinery, Vol. 10, No: 2, Taylor & Francis, U.K., (2004), Pp. 91 - 98.
Ng, E. Y-K., and Liu N.Y.,
“A Multi-coefficient Slip-corrected Reynolds Equation for Ultra-thin Gas
Film Lubrication”, International Journal of Rotating Machinery, Vol. 10, No: ?, Hindwi Publishing Corporation, (2005), Pp. ?? . (in-press)
Ng, E. Y-K.,
Numerical Schemes and CFD
Ng, E. Y-K. "High Resolution Numerical Method for Predicting Slots Film-Cooling Using the Coupled Parabolic/Elliptic Navier-Stokes Solver", International Journal of Numerical Methods for Heat and Fluid Flow, Vol. 3, No: 6, MCB Univ. Press, England, (1993), Pp. 531 -- 544.
Ng, E. Y-K. and Liu S.Z. "The Development of an One-step
Accurate Flux Vector-splitting Implicit Algorithm for Euler and Navier-Stokes
Equations", International Journal of Numerical Methods for Heat and
Fluid Flow, Vol. 6, No: 8, MCB Univ. Press,
Ng, E. Y-K. and Liu S.Z. "A Novel Implicit Difference Algorithm of Primitive Variable Flow Equations with Higher Order Extra Terms", International Journal of Computer & Fluids, Vol. 26, No. 2, Oxford, Pergamon, U.K., (1996). Pp. 163 -- 182.
Ng, E. Y-K. and Wang Y.L "The Development of a Adaptive Euler
Solver using Object-Oriented Approach ", International Journal of
Computational Fluid Dynamics, Vol. 7, No: 2,
Ng, E. Y-K. and Wang, Y.L. " The Object-Oriented Method
to Adaptive CFD", Proceedings of the 11th International
Symposium on Transport Phenomena in Thermal-Fluids Engineering,
Ng, E. Y-K., Siauw W.L and Tsai H.M. "An Evaluation of a Novel Approach to Mesh Generation ", International Journal of Numerical Methods for Heat and Fluid Flow, Vol. 9, No: 8, MCB Univ. Press, England, (1999), Pp. 878 -- 892.
Ng, E. Y-K., Siauw W.L. and Tsai H.M. "Non-linear Solution Adaptive Structured Grids via Heat Conduction Analogies ", An International Journal of Computers & Mathematics with Applications, Vol. 41, No: 1/2, Pergamon, Oxford, Pp. 193 -- 213, (2001).
Ng, E. Y-K. and Kwang M.H. "Development of High Resolution Euler Solver for Unsteady Flow", ASME Fluids Engg. Division Summer Meeting, ASME Paper No: FEDSM2000-11079, Second International Symposium on Advances in Numerical Modeling of Aerodynamics and Hydrodynamics in Turbomachinery, June 11– 15, Boston, MA, USA (2000). Pp. 1 - 8.
Chan, K .I. and Ng, E. Y. K., "Distribution-formula Scheme for the Scalar Transport and Euler Equations", Proceedings of the 4th Asian Computational Fluid Dynamics Conference, Ed. HX Zhang, September 18-22, Mianyang, China, (2000). Pp. 542 - 547.
Ng, E. Y-K. and Kwang M.H.
"An Oscillatory Free Euler/N-S Schemes for Unsteady Internal Flow",
International Journal of Computational Fluid Dynamics, Vol. 9, No: 2,
Ng, E. Y. K. and Chan, K .I. "Development of a Spatially and Temporally Higher-order Accurate Euler Solver", Special Issue "Selected Papers from the 4th Asian Computational Fluid Dynamics Conference", Ed. HX Zhang, International Journal of Computational Fluid Dynamics, Vol. 10, No: 4, Japan, (2002), (ISSN 0918-6654), pp. 531 -- 538.
Ng, E. Y. K. and Chan, K .I. "Development of Distribution-Formula Scheme for Compressible Flows", Book Chapter on "Selected Papers for the 1st MIT Conference on Computational Fluid and Solid Mechanics", June 12-15, 2001, Vol. 2, Bathe, K.J. ed., Elsevier, 2001, pp. 926-929.
Ng, E. Y-K. and Siauw, W.L.," Modelling of Fluid-wall Interactions for Viscous Flow in Stenotic Elastic Artery", Progress in Computational Fluid Dynamics: An International Journal, Vol. 2, No. 1, Switzerland, (2002), Pp. 33 -- 44.
Chan, K. I. and Ng, E. Y-K., "An Improved Distribution-Formula Scheme
for Unstructured Adaptive Navier-Stokes Solvers", AIAA Journal,
Vol. ?, No: , AIAA
Chan, K. I. and Ng, E. Y-K., “Higher-order Upwind Distribution-formula Scheme for Structured and Unstructured Adaptive Flow Solvers”, International Journal of Computational Fluid Dynamics, Vol. 17, No: 1, Taylor & Francis, U.K., (2003), Pp. 61 -- 73.
Ng, E. Y-K., Liu, N.Y., Lim H.N. and Tan T.L., “Study on the Distorted Inlet Flow Propagation in Axial Compressor using an Integral Method”, International Journal of Computational Mechanics, Vol. 30, No: 1, Springer-Verlag, Berlin, (2002), Pp. 1 -- 11.
Ng, E. Y-K., Tan H.Y., Lim H.N. and Choi, D, "Implementation of Cabot’s Near-wall Function to Turbulence Closure Models", International Journal of Computational Mechanics, Vol. 29, No: 2, Springer, Berlin, (2002), Pp. 178 -- 181.
Liu, N.Y., Ng, E. Y-K., Lim H.N. and Tan T.L., “Stall Prediction of In-flight Compressor due to Flamming of Refueling Leakage near Inlet”, International Journal of Computational Mechanics, Vol. 30, No: , Springer-Verlag, Berlin, (2003), Pp. ? -- ?. (in-press)
Liu, N.Y., Ng, E. Y-K., Lim H.N. and Tan T.L., “A Development of Novel Integral Method for Prediction of Distorted Inlet Flow Propagation in Axial Compressor”, International Journal of Computational Mechanics, Vol. 30, No: , Springer-Verlag, Berlin, (2003), Pp. ? -- ?. (in-press)
Ng, E. Y-K. and Tan C.K "Viscous Flow Simulation Around a Moving Projectile and Underwater Robotic Vehicle", International Journal of Computer Applications in Technology, Vol. 11, Nos 3/4/5, Inderscience Enterprises, (1998), Pp. 350 -- 362.
- Heat Transfer and Electronic Cooling
Poh S.T and Ng, E. Y-K. "Heat Transfer and Flow
Issues in Manifold Microchannel Heat Sinks: a CFD approach", 2nd
Electronic Packaging Technology Conference,
Ng, E. Y-K. and Poh S.T. "Fluid Flow and Heat Transfer in Manifold Microchannel Heat Sinks: a CFD approach", International Journal of Computer Modelling and Simulation in Engineering, Vol. 4, No: 4, Sage Science Press, (1999), Pp. 282 -- 289.
Ng, E. Y-K. and Poh S.T. "Investigative Study of Manifold Microchannel Heat Sinks for Electronic Cooling Design", Journal of Electronics Manufacturing, World Scientific, (1999), Pp. 155 -- 166.
Ng, E. Y-K., Tso C.P., Wen Z.M. and Choo K.F. " Numerical Simulation of Flow and Conjugate Heat Transfer in a Microchannel for Electronics Cooling", Journal of Electronics Manufacturing, Vol. 9, No: 2, World Scientific, (1999), Pp. 141 -- 153.
Ng, E. Y-K., Poh S.T and Chai C.K., "Modelling of Pressure-driven Liquid Flows in Conjugate Rectangular Microchannel with Electric Double Layer Effects", Proceedings of 3rd Electronic Packaging Technology Conference, Dec. 5-7, Singapore, Pp. 419-424 (2000)
Ng, E. Y-K. and Poh S.T. "Parametric Studies of Microchannel Conjugate Liquid Flows with Zeta Potential Effects", Journal of Electronics Manufacturing (Special Issue in Advances in Electronic Cooling), Vol. 10, No: 4, World Scientific, (2000), Pp. 237 – 252.
Ng, E. Y-K., Liu, Z.Y. and
Soong, C.Y. "Heat and Flow Evaluation in Rotating Circular Disks Passage
with CFD Approach", Numerical Heat
Transfer, An International Journal of Computation and Methodology, Vol. 38,
No. 6, Taylor &
Ng, E. Y-K. and Poh S.T., “CFD Analysis of Double-layer Microchannel Conjugate Parallel Liquid Flows with Electric Double Layer Effects", Numerical Heat Transfer, An International Journal of Computation and Methodology, Vol. 40, No. 7, Taylor & Francis, USA, (2001), Pp. 735 -- 749.
Ng, E. Y-K. and Poh S.T., "Modelling of Electric Double Layer Effects through Pressure-driven Microchannel Flows", International Journal of Computer Modeling in Engineering & Sciences, Vol. 3, No. 3, Tech Science Press, USA, (2002), Pp. 351 -- 366.
Ng, E. Y-K. and Tan, S.T.,
“Computation of 3D Developing Pressure-driven Liquid Flow in Microchannel
with EDL Effect”, Numerical Heat
Transfer, Part A: Applications,
Vol. 45, No. 10,
Tan S.T. and Ng, E. Y-K.,
“Numerical Analysis of EDL Effect
on Heat Transfer Characteristic of 3-D Developing Flow in Microchannel”, Numerical
Heat Transfer, Part B, Vol. 40, No.
, Taylor &
- Biomedcical Engineering and Life Sciences
Ng, E. Y-K. and Zhou W.D. "Numerical Simulation of Mixed-Flow ‘Blood Pump’ with Computational Fluid Dynamics", ASME Paper No: FEDSM99-6851, Proceedings of the 3rd ASME/JSME Joint Fluids Engineering Conference, July 18 - 23, 1999, San Francisco, California, (1999).
Ng, E. Y-K. and Sudharsan, N.M "Bench Marking the Bioheat Equation for Finite Element Analysis", Proceedings of the 4th International Symposium On Computer Methods in Biomechanics & Biomedical Engineering, Lisbon, Portugal, Oct. 13-16, (1999).
Chen, Y. Ng, E. Y-K., Ung LN and Ng F.C. "Patterns and Cyclic Variations of Thermography in Female Breasts", Proceedings of ICMMB-11: International Conference on Mechanics in Medicine and Biology, April 2-5, 2000 / Maui, Hawaii, USA, Pp. 343 - 346, (2000).
Chua, L.T. and Ng, E. Y-K. "A Finite Element Model for Simulating Skin Burn Effects on Human", Proceedings of ICMMB-11: International Conference on Mechanics in Medicine and Biology, April 2-5, 2000 / Maui, Hawaii, USA, Pp. 315 - 318, (2000).
Ng, E. Y-K. and
Ng, E. Y-K. and Zhou W.D. "Application of CFD Techniques to a Scaled
Rotary Blood Pump", International Journal of Computational Fluid
Dynamics, Vol. 8, No: 4,
Siauw W.L., Ng, E. Y-K. and Mazumdar J., "UNSTEADY FLOW OF FLUIDS THROUGH ARTERIAL STENOSIS: A comparative study of non-Newtonian Models with Operator Splitting Scheme", International Journal of Medical Engineering & Physics, Vol. 22, Elsevier Science, U.K., (2000),Pp. 265 -- 277.
Ung L.N., Chen Y., Ng E.Y.K., N.M. Sudharsan and Ng F.C., "Breast
Thermogram Classifications for Asian Females",3rd Annual NTU-SGH
Biomedical Engineering Symposium, April 14,
Chua L.T., Ng E.Y.K., Lee S.T. and Chiu S.K., " Mathematical
Modelling of Thermal Burn Wounds with PC," 3rd Annual NTU-SGH Biomedical
Engineering Symposium, April 14,
Ng, E. Y-K., Siauw W.L. and Goh W.E.W., "NUMERICAL STUDY OF
UNSTEADY STENOSIS FLOW:
Parametric Evaluation of Power Law Model", International Journal
of Medical Engineering & Technology, Vol. 24, No: 5, Taylor &
Ng, E. Y-K. and Chua L.T., "Mesh Independent Prediction of Skin
Burns Injury", International Journal of Medical Engineering &
Technology, Vol. 24, No: 6, Taylor &
Ng, E. Y-K. and Chua L.T., "Comparison of One- and Two-dimensional Programmes for Predicting the State of Skin Burns", International Journal of BURNS, Vol. 28, No: 1, (2002), Elsevier Science Ltd., Pp. 27 -- 34.
Ng, E. Y-K. and Zhou W.D. "Non-Newtonian Flow in a Large Mixed-flow Pump", International Journal of Computer Applications in Technology, Guest Editor: EYK Ng, Special Issues in Computational Machanics, Vol. 13, Nos 6, (2000), Pp. 332 -- 345.
Ng, E. Y-K. and Siauw W.L. "Unsteady Viscous Flow Model on Moving Domain through Stenotic Artery", International Journal of Engineering in Medicine, Proceedings of the IMechE, Part H, Vol. 215, No. 2, Professional Engineering Publishing, UK, (2001), Pp. 237 – 249.
Chen Y., Ng, E. Y. K and Ung L.N., "Edge Detection of Female Breast
Thermograms", Proceedings of the IASTED International Conference on
Computer Graphics and Imaging, ACTA Press,
Ng, E.Y-K. and Sudharsan, N.M. "Re-warming from Cold Stress in a Female
Breast: A Novel Numerical Prediction
of Vasomotor Behaviour", Proceedings of 10th International Conference on
BioMedical Engineering, December, 6-9, Singapore, Pp. 273-274 (2000). [Reported
in The Straits Times, Tech & Science dated
Chua, L. T. and Ng, E. Y. K., "Fast Prediction of Skin Burn Injury with
Microsoft Excel", Proceedings of 10th International Conference on BioMedical
Engineering, December, 6-9, Singapore, Pp. 273-274 (2000). [Reported in The
Straits Times, Tech & Science dated
Chen Y., Ng, E. Y. K, Ung L.N., "Analysis of the Breast Thermograms in
Asian Females", Proceedings of 10th International Conference on BioMedical
Engineering, December, 6-9, Singapore, Pp. 271-272 (2000). [Reported in The
Straits Times, Tech & Science dated
Ng, E. Y. K, Chen Y., Ung LN, Fok SK and Wan, I.S.Y. "Thermography as
an Indicator of Breast Blood Perfusion", Proceedings of 10th International
Conference on BioMedical Engineering, December, 6-9, Singapore, Pp. 275-276
(2000). [Reported in The Straits Times, Tech & Science dated
Ng, E. Y-K., Chen Y. and Ung L.N. "COMPUTERIZED BREAST THERMOGRAPHY:
Study of Image Segmentation and Temperature Cyclic Variations",
International Journal of Medical Engineering & Technology, Vol. 25, No:
1,
Ng, E. Y-K. and Sudharsan, N.M. "An Improved 3-D Direct Numerical Modelling and Thermal Analysis of a Female Breast with Tumour", International Journal of Engineering in Medicine, Proceedings of the IMechE, Part H, Vol. 215, No. 1, Professional Engineering Publishing, UK, (2001), Pp. 25 -- 37.
Ng, E. Y-K. and Sudharsan, N.M. "EFFECT OF BLOOD FLOW, TUMOUR AND COLD
STRESS IN A FEMALE BREAST: A Novel Time-accurate Computer Simulation", International
Journal of Engineering in Medicine, Proceedings of the IMechE, Part H, Vol.
215, No. H4, Professional Engineering
Cai, YY, Ng, E. Y. K, Ye X, Wang YP, and Chui KC. "Computer Simulation
for Ophthalmological Surgery", Proceedings of 10th International
Conference on BioMedical Engineering, December, 6-9, Singapore, Pp. 313-314.
(2000). [Reported in The Straits Times, Tech & Science dated
Ng, E. Y-K. and
Ng, E. Y-K. and Sudharsan, N.M "NUMERICAL UNCERTAINITY AND PERFUSION
INDUCED INSTABILITY IN BIOHEAT EQUATION: Its Importance in Thermographic
Interpretation", International Journal of Medical Engineering
& Technology, Vol. 25, No: 5, Taylor &
Ng, E. Y-K. and Chua L.T., "Quick Numerical Assessment of
Skin Burn Injury with Spreadsheet in PC ", International Journal
of Mechanics in Medicine ad Biology, Vol. 1, No: 1, World Scientific
Publishing Co.,
Ng, E. Y-K., Peh Y.C. and
Ng, E. Y-K., Chiok Y.H. and Heng, S.H. "The Credibility of the Breast
Cancer Risk Assessment (BCRA) Tool for Asians", International Journal
of Medical Engineering & Technology, Vol. 26, No: 2, Taylor &
Ng, E. Y-K., Ung L.N., Ng F.C. and Sim L.S.J. "Statistical
Analysis of Healthy and Malignant Breast Thermography", International
Journal of Medical Engineering & Technology, Vol. 25, No: 6, Taylor
&
Ng, E. Y-K. and Chua L.T., "Prediction of skin burn injury, Part 1:
Parametric and sensitivity analysis", International Journal of
Engineering in Medicine, Proceedings of the IMechE, Part H, Vol. 216, No.
H3, Professional Engineering
Ng, E. Y-K. and Chua L.T., "Prediction of skin burn injury, Part 2:
modelling", International Journal of Engineering in Medicine, Proceedings
of the IMechE, Part H, Vol. 216, No. H3, Professional Engineering
Ng, E. Y-K., Siauw W.L and Chong C.K. "Simulation of Oscillatory Wall Shear Stress in Channel with Moving Indentation", International Journal for Numerical Methods in Engineering, Vol. 54, No. 10, John Wiley & Sons, (2002), Pp. 1477 -- 1500.
Chiok, Y. H., Ng, E. Y-K. and Kulish, V. V. "A Global Bioheat Model for Quick Evaluation of the Human Physiological Thermal Profiles under Differing Conditions", International Journal of Medical Engineering & Technology, Vol. 26, No: 5, Taylor & Francis, U.K., (2002), Pp. ? -- ?. (in-press)
Ng, E. Y-K. and Siauw W.L. "Direct Solution of Navier-Stokes Equation
on Moving Physical Computational Domain", International Journal of
Computational Engineering Science, Vol. 2, No: 3,
Ng, E. Y-K., Fok S.C., Peh Y.C., Ng, F.C. and Sim, L.S.J., "Computerized Detection of Breast Cancer with Artificial Intelligence and Thermograms”, International Journal of Medical Engineering & Technology, Vol. 26, No: 4, Taylor & Francis, U.K., (2002), Pp. 152 -- 157.
Ng, E. Y-K., Peh Y.C., Fok S.C., Ng, F.C. and Sim, L.S.J., "Early Diagnosis of Breast Cancer using Artificial Neural Network with Thermal Images", Proceedings of the BIOMED2002 International Conference on Biomedical Engineering, Pp. 62-65, Kuala Lumpur, Malaysia. 5 – 8 June 2002.
Ng, E. Y-K., Cai Y.Y., Tai K. and Heng S.H. "Evaluation Studies of Breast Cancer Risk Assessment Tool for Chinese Women", Proceedings of the BIOMED2002 International Conference on Biomedical Engineering, Pp. 23-26, Kuala Lumpur, Malaysia. 5 – 8 June 2002.
Ng, E. Y-K. and Tan J.H.
"Laser Doppler Imaging of
Osteoarthritis in Proximal Interphalangeal Joints”, Microvascular Research,
Vol. 65, No: 1, Reed Elsevier Science,
Academic
Ng, E. Y-K., Tan, S.L.S.
and Kang, S.H. "Laser Doppler Imaging of Menstrual Symptoms”,
International Journal of Medical
Engineering & Technology, Vol. 27, No: 3, Taylor &
Ng, E. Y-K. and Tan J.H. "Assessment of Proximal Interphalangeal Joints in Patients with Osteoarthritis via Laser Doppler Perfusion Imaging”, Journal of Mechanics in Medicine and Biology, Vol. 2, No: 3 & 4, World Scientific, (2002), Pp. 245 -- 266.
Ng, E. Y-K.,
Ng, E. Y-K., and Fok, S.C. “Laser Doppler Perfusion Imaging for the Study of Alternative Medicine”, International Journal of Computer Applications in Technology, Guest Editor: EYK Ng & E.C. Teo, Special Issues in Biomedical Engineering and IT, Vol. 21, No. 1/2, Inderscience, (2004), Pp. 65 -- 71.
Ng, E. Y-K., Fok, S.C., Tan, J.H. and Tan, S.L.S. "A High Resolution Laser Doppler Imaging for Clinical and Research Use in Tissue Perfusion”, International Journal of Computer Applications in Technology, Guest Editor: EYK Ng & E.C. Teo, Special Issues in Biomedical Engineering and IT, Vol. 15, Nos 6, (2002), Pp. ? -- ?. (in-press)
Ng, E. Y-K., and Fok, S.C. “A Framework for Early Discovery of Breast Tumor
using Thermography with Artificial Neural Network”, The
Breast Journal, Vol. 9, No: 4,
Springer-Verlag, Berlin, (2003), Pp. 341 -- 343.
Ng, E. Y-K. and Chua L.T., “Response to ‘Prediction of Skin Burn Injury,
Parts 1 & 2’”, International Journal of Engineering in Medicine,
Proceedings of the IMechE, Part H, Vol. 216, No. H5, Professional
Engineering
Jegathese, C.R., Ng, E. Y-K. and Dhanjoo, N. Ghista, “Perfusion Studies during Steady Flow in Poroelastic Biological Tissue”, International Journal of Computer Methods in Biomechanics and Biomedical Engineering, Vol. 6, Gordon and Breach Science Publishers, USA, (2003), Pp. ??
Ng, E. Y-K and Chong, C., “ANN based
Mapping of Febrile Subjects in Mass Thermogram Screening: Facts and
Myths”, International
Journal of Medical Engineering &
Technology, Vol. , No: , Taylor &
Jiang, L.J., Ng, E. Y-K, Yau, W.Y., Wu, S.,
Jiang, X.D., Yeo, A.C.B. “A Perspective on Medical IR Imaging”,
International Journal of Medical
Engineering & Technology, Vol. , No: , Taylor & Francis, U.K., (2005), Pp. ?? . (in-press)
Ng, E. Y-K, “Is Thermal Scanner Losing its Bite in Mass Screening of Fever due to SARS?#”, Medical Physics*, American Association of Physicists in Medicine (2005), Vol. 32, No: 1, Pp. 93--97.
*This is a high impact factor journal. #This paper has also been further selected
for the
- Hard Disk Drive
Liu Z.Y. and Ng, E. Y-K. "Simulation of Flow in
Passage within the Ventilated and Non-ventilated Rotating Disks", International
Journal of Computational Fluid Dynamics, Vol. 7, No: 4,
Ng, E. Y-K. and Tan S.T. "Evaluation of Turbulence Models
for Fluid Machinery Application", ASME Paper No: FEDSM99-6843, Proceedings of the 3rd ASME/JSME Joint
Fluids Engineering Conference, July 18 - 23, 1999,
Ng, E. Y-K., Liu, Z.Y. and Soong, C.Y. "Numerical Evaluation of Heat and Fluid Flow within Rotating Disks", International Journal of Computational Engineering Science, Vol. 2, No: 1, Imperial College Press, (2001), (ISSN 1465-8763), Pp. 11 -- 30.
Ng, E. Y-K. and Liu, Z.Y. "Prediction of Unobstructed
Flow for Co-rotating Multi-disk Drive in an Enclosure", International
Journal for Numerical Methods in Fluids, Vol. 35, John Wiley & Sons,
Ng, E. Y-K., Liu, Z.Y. and Soong, C.Y. "Heat and flow evaluation in rotating circular disks passage with CFD approach", Numerical Heat Transfer, An International Journal of Computation and Methodology, Vol. 38, No. 6, Taylor & Francis, USA, (2000), Pp. 611 -- 626.
Ng, E. Y-K. and Liu N.Y. "The Impacts of Time-step Size in the Application of DSMC Method to Ultra-thin Gas Film Lubrication", Journal of Micromechanics and Microengineering, Institute of Physics Publishing, Vol. 12, U.K., (2002), Pp. 567 -- 573.
Ng, E. Y-K., Liu N.Y. and Xiaohai Mao, "Stress-density Ratio Slip-corrected Reynolds Equation for Ultra-thin Film Gas Bearing Lubrication", Physics of Fluids, American Institute of Physics Publishing, Vol. 14, No: 4, U.S.A., (2002), Pp. 1450-1457.
Ng, E. Y-K. and
Ng, E. Y-K., Liu N.Y. and Xiaohai Mao, “A Development of Slip Model
and Slip-corrected Reynolds Equation for Gas Lubrication in Magnetic Storage Device”,
Book Chapter 10 on Microfluidics and BioMEMS Applications, Kluwer
Acad. Pub.
Ng, E. Y-K., Liu N.Y. and Xiaohai Mao, “Response to ‘Stress-density Ratio Slip-corrected Reynolds Equation for Ultra-thin Film Gas Bearing Lubrication’”, Physics of Fluids, American Institute of Physics Publishing, Vol. 14, No: 10, U.S.A., (2002), Pp. 3748--3749.
Others
Ng, E. Y-K. "The CAD of Turbomachinery", B.Eng. (Class I)
Final Year Project Report,
Ng, E. Y-K. "A High-resolution Coupled Parabolic/elliptic Navier-Stokes Solver for Turbomachinery Flows", Ph.D. Thesis, Whittle Laboratoty, Queens' College, University of Cambridge, England, 123 pages, (1992).
Ng, E. Y-K. "Three-Dimensional Compressible Navier-Stokes Computation of Turbomachinery Blade Passages Flows Using an Implicit Finite-Volume Numerical Technique", Proceedings of 5th Mindef- NTU Joint R & D Seminar Paper, Singapore (1993), Pp. 78 -- 85.
Ng, E. Y-K. "Simulation of Quasi-3D Viscous Compressible Flow in
Turbomachinery Blade Cascades Using an Implicit Finite-Volume
Navier-Stokes Technique", ASME, The
Ng, E. Y-K. "Compressible Navier-Stokes Prediction of
Turbomachinery Flows", Proceedings of 5th Aerospace Technology
Seminar, RSAF/MOD,
Ng, E. Y-K. "An Effective Learning of Engineering Mathematics for Mechanical and Production Engineering Undergraduates in NTU ", Interim Project Report, PGDipTHE, NIE, Singapore, Pp. 1 -- 45, (Mar. 1995).
Ng, E. Y-K. and Miao Y. "Navier-Stokes Simulation of Steady Axial Flow
in Modern Aircraft Turbomachinery Stages", Proceedings of 7th
Aerospace Technology Seminar, RSAF/MOD,
Lau, G.K. and Ng, E.Y-K. "Computations of 3-D Incompressible Viscous
Turbulent Flow for Mixed-Flow
Pump Impeller at Various Tip Clearance", Proceedings of 2nd National
Undergraduate Research Programme Congress cum Poster Presentations,
Vol. 3 ,
Siauw, W.L. and Ng, E.Y-K. "2-D Flow Adaptation Approach on
Unstructured Grid", Proceedings of 2nd National Undergraduate
Research Programme Congress, Vol. 3 ,
Ng, E. Y-K., Tan S.T. and Lim H.N. "Simulation of Instability
Flow in Compressor System", Proceedings of 8th Aerospace
Technology Seminar, RSAF/MOD,
Ng, E. Y-K. "Forced Response Predictions of Turbomachinery Blade Rows in Single-stage Environment", RSAF Contractor Report No: CMM-9500294, 122 pages, Singapore, (Dec., 1997).
Ng, E. Y-K. "High Speed Turbomachinery Stage Simulation with CFD",
Proceedings of 9th Aerospace Technology Seminar, RSAF/MOD/SAFTI
Military Institute,
Heng C.C., Ng E.Y.K., and
Ng, E. Y-K. and Goh P.T.K. "F404 Engine Simulation
programme", RSAF Contractor Report No: CMM-9301081, 84 pages,
Chan E.L.M., Ng E.Y.K., and
Ng, E. Y-K., Fok S.C. Ng F.C. and Sim L.S.J. "Breast Tumour Detection by Thermography", AcRF Report No: RG 69/98, 101 pages, Singapore, (July, 2001).
Tan H.Y., Ng, E. Y-K. Choi,
D, Lim H.N. "Application of Cabot’s Wall Function into Turbulence Models
", Proceedings of 12th Aerospace Technology Seminar, RSAF/MOD,
STUDENTS / STAFF SUPERVISED FOR THE LAST 6 YEARS:
|
No. |
Name |
Topic |
Degree |
Year/Now |
|
1 |
Ms Liu Shenzhi |
An effective flux-vector-splitting implicit scheme for 2D internal flow |
M. Eng. |
1995 |
|
2 |
Mr Miao Yi |
Numerical study of viscous flow throu. Q3D multistage turbomachinery |
M. Eng. |
1996 |
|
3 |
Ms Wang Yanling |
An Object-Oriented Approach to Adaptive CFD |
M. Eng. |
1997 |
|
4 |
Mr S. Sreeyasunath |
Forced Response Predictions of Turbomachinery Blade Rows in Single-stage Environment |
Project Officer |
1996-1997 |
|
5 |
Mr Tan S.T. |
Numerical Investigation of Viscous Flow in Disk Passage with Different Turbulent Models |
M. Eng. |
1998 |
|
6 |
Mr Zhou W.D. |
3-D Flow Performance of Centrifugal Blood Pump using CFD Approach |
M. Eng. |
1999 |
|
7 |
Mr Liu Z.Y. |
Simulation of Ventilated Flow in the Unobstructed Passage within Co-Rotating Disks in a Cylindrical Enclosure |
M. Eng. |
1999 |
|
8 |
Mr Kwang M.H. |
Development of High Resolution Schemes for Unsteady Turbomachinery Flow |
M. Eng. |
1999 |
|
9 |
Numerical Modeling of Normal and Malignant Female Breasts for Cancer Diagnostic System |
Ph.D. |
2000 |
|
|
10 |
Mr Siauw W.L |
Unsteady Stenosis Blood/Wall Prediction |
M. Eng. |
2000 |
|
11 |
Mr Poh S.T. |
Numerical Investigation of Flow & Heat Transfer thro. Microchannels |
M. Eng. |
2000 |
|
12 |
Mr Chua L.T. |
Prediction of Skin Burn Injury |
M. Eng. |
2001 |
|
13 |
Ms Ung L.N. |
Biomedical Thermography for Breast Screening |
M. Eng. |
2001 |
|
14 |
Mr Tan H.Y. |
Cabot's Wall Function with RANS (co-supervised with Pratt & Whitney, USA). |
M. Eng. |
2002 |
|
15 |
Dr. Chen Ying |
"Early Detection of Breast Cancer" Project (PDF) |
Research Fellow |
2001 |
|
16 |
Mr Chan K.I. |
Unstructure Adaptive NS Solver |
M. Eng. |
2001 |
|
17 |
Dr. Liu Ninyu |
Numerical and Analytical Study of Micro Air Bearing Flow within Rotating Disks in a Cylindrical Enclosure |
Research Fellow |
2001 |
|
18 |
Dr. Liu Ninyu |
RSAF Project on Stall & Surge in Axial Compressor |
Research Fellow |
2003 |
|
19 |
Mr Tan S.T. |
Micro-scale Liquid Cooling |
P-T Ph.D. |
(completing) |
|
20 |
Mr Chew S.C. |
CFD & Advancement in Grid Generation |
P-T Ph.D. |
(left) |
|
21 |
Mr Cyril R. Jegathese |
Heart Wall Perfusion Modelling |
P-T Ph.D. |
Snr Engr. (CAMTECH) |
|
22 |
Mr Zhong Liang |
Investigative Study of Heart Muscle Mechanics |
PhD |
2005 |
|
23 |
Mr Ng Wan Kee |
Computational Modelling of Biopotential Fields in the Female Breast With and Without Tumour |
M.Eng. |
2005 |
1. Modelling of Hypothermia and Circulatory Arrest
This study is to build up a mathematical analysis of the factors, which can direct effect on rate of brain cooling during cardiopulmonary bypass. The colder blood cools the brain during hypothermic cardiopulmonary bypass, almost exclusively. We can use the corresponding component of the bioheat transport model to predict the proportional direct effect of changing blood density and specific heat on the amplitude of the rate of brain cooling.
From a clinical perspective, profound hypothermia is deliberately induced to prevent cerebral ischemic injury during certain types of cardiac and cerebrovascular surgeries. Therefore, we need ways to improve brain cooling during bypass without incurring severe cerebral injury. The aim of the study is thus, to establish a mathematical model of hypothermia and circulatory arrest describing flow and pressure parameters in the body. We can use the model to gain a preliminary assessment of what physical or physiologic parameters affect rate of brain cooling in the setting of cardiac surgery. In brief, the study will not only provide new insights into the human thermo-regulatory system, but also will provide information with clinical applicability.
Objective: Study the level of confidence with which computational burn model parameters may be determined from typical experimental data, such as the pioneering work of Henriques, and the sensitivity of injury calculations to variations in magnitude of the parameters.
Scope: Thermal burns happen as a result of the evaluation of tissue temperature above a threshold range. Numerical models are commonly used to predict the severity of burns issuing from specific regimens of thermal insult characterized in terms of environment temperature and time of exposure. The burn injury process is represented frequently by chemical rate processes governed by an activation energy and pre-exponential frequency factor. However, these injury constants from experimental data were far less accurate than is possible to obtain with modern numerical techniques, and the resulting variations in the calculated degree of injury may be very large. The scope is thus for thorough and rigorous evaluation of the methods by which thermal burn severity is computed. The opportunity is good for improving the level of confidence in the ability to be able to compute burn injuries accurately. (Picture on Burns ICU, National Burn Centre, Singapore General Hospital, by Courtesy of Dr. Colin Song)
3. Investigation and Analysis of Stall Flutter Using CFD Code Prediction
Stall flutter in turbomachinery is due to an aeromechanical instability of fan and compressor blades that usually occurs at part speeds. It is during this speed range that the blades are subjected to high mean flow incidences. The associated vibratory modes generally correspond to the lowest natural frequencies, either in the first bending and/or torsional mode, of the blade. As such, an efficient, reliable and experimentally validated CFD tool for stall flutter is essential in helping turbomachinery designers to better understand stall flutter, and subsequently design flutter free blade.
The current proposal represents one of the most challenging problems in fluid mechanics because of the complex geometry involved and the nature of the flow unsteadiness. Though, a number of CFD tools have been developed for stall flutter analysis, ranging from the efficient, time-linearized, Euler code to the computationally expensive direct simulation using non-linear, viscous, time marching techniques, few have methodically compared the relative merits of all existing models. Based on this analysis, the most applicable method can be used to further improve an existing CFD code.
Finally, the importance and relevancy of this research work has been established and identified with the Air Logistic Dept. RSAF and Pratt & Whitney through the OJT Programme on F100 engine.
An unsteady non-Newtonian incompressible N-S flow solver on continuum modeling for blood and arterial vessel wall using Fasttalk language within the Fastflo environment has been validated. Code validation for the developed Newtonian model has also been performed on two different geometry of a backward facing step at two Reynolds numbers of 50 and 150 to serve as a basis for modification to a non-Newtonian model. The Power law and Casson models have been used as the constitutive equations for blood with a haematocrit of approximately 45%. Non-Newtonian effects have been observed to be most significant at the vicinity of the stenosis.
In brief, the visco-elastic nature for vascular wall and its interaction
with blood is being studied qualitatively and quantitatively. Future work is on
the wall vessel/fluid coupling analysis.