Assistant Professor, Mechanical Engineering
5000 Forbes Avenue
Scaife Hall 317
Pittsburgh, PA 15213
Prof. You’s research goal is to develop a computational framework for high-fidelity simulation and design of thermo-fluid systems that are innovative in the energy conversion and energy utilization processes. In addition to conventional energy conversion and propulsion systems, Prof. You is also interested in renewable and sustainable energy conversion systems such as wind- and hydro-power (wind and hydro turbines) for electricity and/or hydrogen production and hydrogen conversion systems such as combustors and fuel cells.
For innovative energy utilization, Prof. You is interested in developing flow control and optimization methods especially for enhancing energy efficiency, performance, and stability, and reducing pollutants, acoustic noise, and other unfavorable features of (i) energy conversion and propulsion systems (combustor, compressor, propeller, and turbine); (ii) aircraft high-lift systems and wind turbine blades; and (iii) micro-scale thermo-fluid systems (applications of hydrophobic surfaces and synthetic jets).
Prof. You and his research team are approaching research with the current work focusing on the following areas:
Computational Flow Physics and Engineering - Large Eddy Simulation
Development and utilization of new subgrid-scale models (e.g.,global-coefficienteddy-viscosity model) and advanced numerical methods (geometrically-flexible, accurate, and stable methods based ondiscrete conservation principles) for large-eddy simulation of turbulent flows incomplex configurations.Global-coefficientsubgrid-scale model for compressible turbulence and scalar transport in complex configurations. Grid-independent large-eddy simulation employing explicit filtering techniques.
Integrated Simulation of Energy Conversion Systems
Integrated simulation and analysis ofmulti-physics(turbulence, combustion, spray dynamics, heat transfer, pollutants formation) in energy conversion / propulsion systems (especially combustors in aircraft jet engines and industrial gas turbine engines) usingmultiple code(large-eddy simulation, Reynolds-averaged Navier-Stokes simulation, Lagrangian spray dynamics, chemical reaction)coupling techniques.
Flow Control and Optimization for Energy- and Environment-Compatible Thermo-Fluid Systems
Development of efficientflow control and optimizationmethods for (i) enhancing efficiency and performance and reducing pollutants and acoustic noise of energy conversion systems (combustor, compressor, propeller, turbine, diffuser); (ii) enhancing performance and stability and reducing noise of high-lift systems (aircraft wing, wind turbine wing); and (iii) enhancing mixing and heat transfer and reducing form/skin-friction drag in micro-scale thermo-fluid systems (hydrophobic surfaces, synthetic jets).
Renewable and Sustainable Energy Systems
Design, simulation, and analysis of renewable and sustainable energy conversion systems such as wind- and hydro-power systems (wind and hydro turbines) for electricity and/or hydrogen production and hydrogen conversion systems such as combustors and fuel cells aiming at high efficiency, performance, and durability, and low emission and acoustic noise.
B.S. 1995, Yonsei University
M.S. 1998, Seoul National University
Ph.D. 2004, Stanford University
You, D. & Moin, P., 2008, Active Control of Flow Separation Over an Airfoil Using Synthetic Jets.Journal of Fluids and Structures, Vol. 24, pp. 1349-1357.
You, D., Ham, F. & Moin, P., 2008, Discrete Conservation Principles in Large-Eddy Simulation with Application to Separation Control Over an Airfoil.Physics of Fluids, Vol. 20 (10), 101515.
You, D., Wang, M., Moin, P. & Mittal, R., 2007, Large-Eddy Simulation Analysis of Mechanisms for Viscous Losses in a Turbomachinery Tip-Clearance Flow.Journal of Fluid Mechanics, Vol. 586, pp. 177-204.
You, D.& Moin, P., 2007, Effects of Hydrophobic Surfaces on the Drag and Lift of a Circular Cylinder.Physics of Fluids, Vol. 19 (8), 081701.
You, D., Wang, M., Moin, P. & Mittal, R., 2007, Vortex Dynamics and Low-Pressure Fluctuations in the Tip-Clearance Flow.Journal of Fluids Engineering, Vol. 129 (8), pp. 1002-1014.
You, D.& Moin, P., 2007, A Dynamic Global-Coefficient Subgrid-Scale Eddy-Viscosity Model for Large-Eddy Simulation in Complex Geometries.Physics of Fluids, Vol. 19 (6), 065110.
You, D., Wang, M. & Mittal, R., 2007, A Methodology for High Performance Computation of Fully Inhomogeneous Turbulent Flows.Int. J. for Numerical Methods in Fluids, Vol. 53 (6), pp. 947-968.
You, D., Wang, M., Mittal, R. & Moin, P., 2006, Large-Eddy Simulations of Longitudinal Vortices Embedded in Turbulent Boundary Layer.AIAA Journal, Vol. 44 (12), pp. 3032-3039.
You, D., Wang, M. & Moin, P., 2006, Large-Eddy Simulation of Flow Over a Wall-Mounted Hump with Separation Control.AIAA Journal, Vol. 44 (11), pp. 2571-2577.
You, D., Wang, M., Mittal, R. & Moin, P., 2006, A Quasi-Generalized-Coordinate Approach for Numerical Simulation of Complex Flows.Journal of Fluids Engineering, Vol. 128 (6), pp. 1394-1399.
You, D., Wang, M., Moin, P. & Mittal, R., 2006, Effects of Tip-Gap Size on the Tip-Leakage Flow in a Turbomachinery Cascade.Physics of Fluids. Vol. 18 (10), 105102.
You, D., 2006, A High Order Pade ADI Method for Unsteady Convection-Diffusion Equations.Journal of Computational Physics, Vol. 214, pp. 1-11.
You, D., Mittal, R., Wang, M. & Moin, P., 2006, Analysis of Stability and Accuracy of Finite-Difference Schemes on a Skewed Mesh.Journal of Computational Physics, Vol. 213, pp. 184-204.
You, D., Wang, M., Mittal, R. & Moin, P., 2004, Study of Tip-Clearance Flow in Turbomachines Using Large-Eddy Simulation.Computing in Science & Engineering, Vol. 6, No. 6, 38-46. Invited and Featured Article.
You, D., Mittal, R., Wang, M. & Moin, P., 2004, Computational Methodology for Large-Eddy Simulation of Tip-Clearance Flows.AIAA Journal, Vol. 42, No. 2, pp. 271-279.
You, D., Choi, H., Choi, M.-R. & Kang, S.-H., 1998, Control of Flow-Induced Noise Behind a Circular Cylinder Using Splitter Plates.AIAA Journal, Vol. 36, No. 11, pp. 1961-1967.
Selected Awards & Honors
- Outstanding Technical and Scientific Accomplishments Award, Stanford University, 2007 and 2008
- The Lewis F. Moody Award, American Society of Mechanical Engineers (ASME), 2006
- Postdoctoral Fellowship, Center for Turbulence Research, NASA/Stanford University, 6/2004-2/2005
- Challenge Project Grant, Department of Defense High Performance Computing Modernization Program, 10/2001-3/2005
- Fellowship, Center for Turbulence Research, NASA/Stanford University, 1999