Jianming Yang

Current Research

I am an Associate Research Scientist with Prof. Frederick Stern's ship hydrodynamics group in the IIHR - Hydroscience and Engineering at the University of Iowa. My current research is focused on the development of numerical methods for a variety of applications: free-surface/interfacial flows, fluid-structure interactions, and others.

Numerical methods:

1. Level set method;
2. Sharp interface method.

Validation cases:

1. Solitary wave;
2. Dam-break problem;
3. 3D spherical cap bubble.

Non-breaking and Breaking waves generated by immersed bodies:

1. 2D non-breaking waves generated by an immersed NACA0012 hydrofoil;
2. 3D spilling breaking waves generated by an immersed NACA0012 hydrofoil;
3. 2D impulsive plunging breaking waves behind a surface-mounted bump;
4. 3D impulsive plunging breaking wave behind a surface-mounted bump.

Breaking waves generated by free-surface-piercing bodies:

1. 3D waves generated by a NACA0024 hydrofoil;
2. 3D waves around a DTMB5415 model (coming soon!).

Two-phase flows interacting with moving bodies:

1. 2D wave-body interaction: rotators;
2. 2D water exit;
3. 2D water entry and impact;
4. 3D landslide-generated waves.

Doctoral Research

I received my PhD degree in Mechanical Engineering at the University of Maryland, College Park in 2005 under the supervision of Prof. Elias Balaras. In the course of my PhD study, I developed a highly efficient embedded boundary method with formal second-order accuracy for the high-fidelity simulations (LES and DNS) of turbulent flows interacting with complex geometries and moving boundaries. This method is a variation of the immersed boundary method and it can describe the moving or deforming interfaces on Cartesian grids without smearing the sharpness of the interfaces. We have successfully applied this method to the a variety of non-trivial cases in bluff-body flows, biological flows, physiological flows, vortex-induced vibrations, and fluid-structure interactions:

Two-dimensional validation cases with moving bodies (prescribed motions):

1. Translating cylinders in a planar channel;
2. Forced oscillating cylinder in a quiescent fluid at Re=100;
3. Forced oscillating cylinder in cross flow at Re=185;

Two-dimensional fluid-structure interactions/vortex induced vibrations (two-way coupling):

1. Cylinder with one degree of freedom in cross flow at Re=90~200;
2. Cylinder with two degrees of freedom in cross flow at Re=200;
3. Vortex-induced vibration in an Array of Cylinders at Re=200.

Three-dimensional cases with stationary bodies:

1. LES of fully developed turbulent pipe flow;
2. DNS of laminar flow past a sphere at Re = 50, 100, 150, 200, and 250;
3. DNS of laminar flow past a sphere at Re = 300;
4. DNS of transitional flow past a sphere at Re=1,000;
5. LES of transitional flow over an airfoil at Reynolds number 10,000.

Three-dimensional cases with moving boundaries:

1. LES of turbulent flow over a traveling wavy wall at Re=10,170;
2. LES of transitional flow past a mechanical heart valve with moving leaflets at Re=4,000.

Education

Ph.D., Mechanical Engineering, University of Maryland, College Park, 2005.
M.S., Civil Engineering, Nanjing Hydraulic Research Institute, China, 1999.
B.S., Civil Engineering, Wuhan University of Hydraulic and Electric Engineering, China, 1996.

Journal Publications

1. Jianming Yang and Frederick Stern, Sharp interface immersed-boundary/level-set method for wave-body interactions, Journal of Computational Physics, Vol. 228 (17), pp. 6590-6616, 2009, Link.
2. Zhaoyuan Wang, Jianming Yang, and Frederick Stern, An improved particle correction procedure for the particle level set method, Journal of Computational Physics, Vol. 228 (16), pp. 5819-5837, 2009, Link.
3. Zhaoyuan Wang, Jianming Yang, Bonguk Koo, and Frederick Stern, A coupled level set and volume-of-fluid method for sharp interface simulation of plunging breaking waves, International Journal of Multiphase Flow, Vol. 35 (3), pp. 227-246, 2009. Link.
4. Jianming Yang, Sergio Preidikman, and Elias Balaras, A strongly-coupled, embedded-boundary method for fluid-structure interactions of elastically mounted rigid bodies, Journal of Fluids and Structures, Vol. 24 (2), pp. 167-182, 2008. Link.
5. Jianming Yang and Elias Balaras, An Embedded-Boundary Formulation for Large-Eddy Simulation of Turbulent Flows Interacting with Moving Boundaries, Journal of Computational Physics, Vol. 215 (1), pp. 12-40, 2006. Link.
6. Elias Balaras and Jianming Yang, Nonboundary Conforming Methods for Large-Eddy Simulations of Biological Flows, ASME Journal of Fluids Engineering, Vol. 127 (5), pp. 851-857, 2005. Link.
7. Jianming Yang and Dingfang Li, Parallel Computing for Complex Flows (in Chinese), Hydro-Science and Engineering, No. 1, March 2002, pp. 19-24.
8. Jianming Yang and Jianhua Wu, Numerical Simulation of Scouring Process under Spillway, Journal of Hydrodynamics, Ser. B, Vol. 13, No. 4, December 2001, pp. 55-59.
9. Jianming Yang and Jianhua Wu, Numerical Simulation of Submerged Hydraulic Jump (in Chinese), Journal of Hydrodynamics, Ser. A, Vol. 16, No. 4, December 2001, pp. 405-411.
10. Jianming Yang and Jianhua Wu, Numerical Modeling of the Scouring Process of Free Jet Using Moving Grids (in Chinese), Journal of Hydrodynamics, Ser. A, Vol. 16, No. 2, June 2001, pp. 156-161.
11. Tongkang Tao, Yingjie Hou, Lin Feng, Jun Yan, and Jianming Yang, Development of Geotextile Sandbags with High Friction Coefficient (in Chinese), Hydro-Science and Engineering, No. 1, March 2001, pp. 68-72.

Conference Proceedings

1. Frederick Stern, Shanti Bhushan, Pablo Carrica, Jianming Yang, Large scale parallel computing and scalability study for surface combatant static maneuver and straight ahead conditions using CFDShip-Iowa, in: Proc. 21st Int. Conf. Parallel Comput. Fluid Dynamics, Moffett Field, CA, 2009.
2. Jianming Yang, Shanti Bhushan, Jung Soo Suh, Zhaoyuan Wang, Bonguk Koo, Nobuaki Sakamoto, Tao Xing, and Frederick Stern, Large-Eddy Simulation of Ship Flows with Wall-Layer Models on Cartesian Grids, 27th Symposium on Naval Hydrodynamics, 5 - 10 October 2008, Seoul, Korea, preprint (pdf file, 5.5MB).
3. Zhaoyuan Wang, Jianming Yang, and Frederick Stern, Comparison of Particle Level Set and CLSVOF Methods for Interfacial Flows, 46th AIAA Aerospace Sciences Meeting and Exhibit, 7 - 10 January 2008, Reno, Nevada, AIAA-2008-530 (pdf file, 1.2MB).
4. Surajeet Ghosh, George Reins, Bonguk Koo, Zhaoyuan Wang, Jianming Yang, and Frederick Stern, Plunging Wave Breaking: EFD and CFD, Proceedings of International Conference on Violent Flows (VF-2007), Fukuoka, Japan, November 2007. preprint (pdf file, 5.7MB)
5. Jianming Yang, Nobuaki Sakamoto, Zhaoyuan Wang, Pablo Carrica, and Frederick Stern, Two Phase Level-Set/Immersed-Boundary Cartesian Grid Method for Ship Hydrodynamics, Proceedings of the 9th International Conference on Numerical Ship Hydrodynamics, Ann Arbor, Michigan, August 2007. preprint (pdf file, 1.3MB)
6. Jianming Yang and Frederick Stern, A Sharp Interface Method for Two-Phase Flows Interacting with Moving Bodies, Proceedings of the 18th AIAA Computational Fluid Dynamics Conference, Miami, Florida, June 2007, AIAA-2007-4578 (pdf file, 5.3MB).
7. Jianming Yang, Fred Stern, Large-Eddy Simulation of Breaking Waves Using Embedded-Boundary/Level-Set Method, 45th AIAA Aerospace Sciences Meeting and Exhibit, 8 - 11 January 2007, Reno, Nevada, AIAA-2007-1455 (pdf file, 6.7MB).
8. Fred Stern, Juntao Huang, Pablo Carrica, Jianming Yang, Surajeet Ghosh, and Suak-Ho Van, Two-Phase CFD and PIV EFD for Plunging Breaking Waves, Including Alternative CFD approaches and Extensions for Air/Water Ship Flow, Proceedings of the 26th Symposium on Naval Hydrodynamics, Rome, Italy, September 2006. preprint (pdf file, 2.9MB)
9. Jianming Yang, Sergio Preidikman, and Elias Balaras, A Strong Coupling Scheme for Fluid-Structure Interaction Problems with Dynamically Moving Boundaries in Viscous Incompressible Flows, VIII Argentinian Congress on Computational Mechanics, MECOM 2005, Buenos Aires, Argentina, November 2005. preprint (pdf file, 1.2MB)
10. Jianming Yang, Sergio Preidikman, and Elias Balaras, Large-Eddy Simulations of Fluid-Structure Interaction Problems, Proceedings of the Third M.I.T. Conference on Computational Fluid and Solid Mechanics, Massachusetts Institute of Technology, Cambridge, Massachusetts, June 2005. preprint (pdf file, 1.3MB)
11. Jianming Yang, Sergio Preidikman, and Elias Balaras, A Strong Coupling Scheme for Fluid-Structure Interactions Problems in Viscous Incompressible Flows, Proceedings of the Conference on Computational Methods for Coupled Problems in Science and Engineering - COUPLED PROBLEMS 2005, Santorini Island, Greece, May 2005. preprint (pdf file, 2.2MB)
12. Jianming Yang and Elias Balaras, Parallel Large-Eddy Simulations of Turbulent Flows with Complex Moving Boundaries on Fixed Cartesian Grids, Proceedings of the International Conference on Parallel Computational Fluid Dynamics 2005, University of Maryland, College Park, May 2005. preprint (pdf file, 2.1MB)
13. Elias Balaras and Jianming Yang, Non-Boundary Conforming Methods for Large-Eddy Simulations of Biological Flows, HT-FED2004-56350, Proceedings of 2004 ASME Heat Transfer/Fluids Engineering Summer Conference, Charlotte, North Carolina, July 2004. preprint (pdf file, 1.MB)
14. Jianming Yang and Jianhua Wu, Numerical Modeling of Turbulent Flow Using k-omega Turbulence Model (in Chinese), in Nature, Industries, and Flows, Proceedings of the 6th National Conference of Fluid Mechanics, Shanghai, China, March 2001, edited by Jiachun Li, (Beijing, China Meteorological Press), pp. 107-112.

Conference Presentations

1. Jianming Yang and Frederick Stern, Sharp Interface Immersed-Boundary/Level-Set Cartesian Grid Method for Large-Eddy Simulation of Two-Phase Flows with Surface-Piercing Moving Bodies, The 60th Annual Meeting of the American Physical Society - Division of Fluid Dynamics, November 2007, Salt Lake City, Utah. Abstract
2. Jianming Yang and Elias Balaras, An embedded boundary formulation for fluid structure interactions of elastically mounted rigid bodies, The 58th Annual Meeting of the American Physical Society - Division of Fluid Dynamics, November 2005, Chicago, Illinois. Abstract
3. Jianming Yang and Elias Balaras, An Immersed-Sharp-Interface Method for Large-Eddy Simulation of Complex Flows with Moving Boundaries, The 57th Annual Meeting of the American Physical Society - Division of Fluid Dynamics, November 2004, Seattle, Washington. Abstract

Technical Report

1. Jianming Yang, Parallel Computing for Complex Turbulent Flows Using PC Cluster, Nanjing Hydraulic Research Institute, Nanjing, China, May 2001 (64 pages).

Thesis and Dissertation

1. Jianming Yang, An Embedded Boundary Formulation for Large-Eddy Simulation of Turbulent Flows Interacting with Moving Boundaries, PhD Dissertation, The University of Maryland, College Park, Maryland, USA, 2005. Link.
2. Jianming Yang, Numerical Modeling of Complex Flows — An Implicit Finite Volume Method with Colocated Variable Arrangement and Its Applications, Master Thesis, Nanjing Hydraulic Research Institute, Nanjing, China, 1999.

Copyright © 2004-2009 Jianming Yang

Last modified Wednesday, June 10, 2009