Donghyun You
Assistant Professor, Mechanical Engineering
5000 Forbes Avenue
Scaife Hall 317
Pittsburgh, PA 15213
Bio
Prof. You’s research goal is to develop a computational framework for highfidelity simulation and design of thermofluid 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 hydropower (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 highlift systems and wind turbine blades; and (iii) microscale thermofluid 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 subgridscale models (e.g.,globalcoefficienteddyviscosity model) and advanced numerical methods (geometricallyflexible, accurate, and stable methods based ondiscrete conservation principles) for largeeddy simulation of turbulent flows incomplex configurations.Globalcoefficientsubgridscale model for compressible turbulence and scalar transport in complex configurations. Gridindependent largeeddy simulation employing explicit filtering techniques.
Integrated Simulation of Energy Conversion Systems
Integrated simulation and analysis ofmultiphysics(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(largeeddy simulation, Reynoldsaveraged NavierStokes simulation, Lagrangian spray dynamics, chemical reaction)coupling techniques.
Flow Control and Optimization for Energy and EnvironmentCompatible ThermoFluid 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 highlift systems (aircraft wing, wind turbine wing); and (iii) enhancing mixing and heat transfer and reducing form/skinfriction drag in microscale thermofluid 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 hydropower 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.
Education
B.S. 1995, Yonsei University
M.S. 1998, Seoul National University
Ph.D. 2004, Stanford University
Selected Publications

You, D. & Moin, P., 2008, Active Control of Flow Separation Over an Airfoil Using Synthetic Jets.Journal of Fluids and Structures, Vol. 24, pp. 13491357.

You, D., Ham, F. & Moin, P., 2008, Discrete Conservation Principles in LargeEddy 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, LargeEddy Simulation Analysis of Mechanisms for Viscous Losses in a Turbomachinery TipClearance Flow.Journal of Fluid Mechanics, Vol. 586, pp. 177204.

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 LowPressure Fluctuations in the TipClearance Flow.Journal of Fluids Engineering, Vol. 129 (8), pp. 10021014.

You, D.& Moin, P., 2007, A Dynamic GlobalCoefficient SubgridScale EddyViscosity Model for LargeEddy 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. 947968.

You, D., Wang, M., Mittal, R. & Moin, P., 2006, LargeEddy Simulations of Longitudinal Vortices Embedded in Turbulent Boundary Layer.AIAA Journal, Vol. 44 (12), pp. 30323039.

You, D., Wang, M. & Moin, P., 2006, LargeEddy Simulation of Flow Over a WallMounted Hump with Separation Control.AIAA Journal, Vol. 44 (11), pp. 25712577.

You, D., Wang, M., Mittal, R. & Moin, P., 2006, A QuasiGeneralizedCoordinate Approach for Numerical Simulation of Complex Flows.Journal of Fluids Engineering, Vol. 128 (6), pp. 13941399.

You, D., Wang, M., Moin, P. & Mittal, R., 2006, Effects of TipGap Size on the TipLeakage Flow in a Turbomachinery Cascade.Physics of Fluids. Vol. 18 (10), 105102.

You, D., 2006, A High Order Pade ADI Method for Unsteady ConvectionDiffusion Equations.Journal of Computational Physics, Vol. 214, pp. 111.

You, D., Mittal, R., Wang, M. & Moin, P., 2006, Analysis of Stability and Accuracy of FiniteDifference Schemes on a Skewed Mesh.Journal of Computational Physics, Vol. 213, pp. 184204.

You, D., Wang, M., Mittal, R. & Moin, P., 2004, Study of TipClearance Flow in Turbomachines Using LargeEddy Simulation.Computing in Science & Engineering, Vol. 6, No. 6, 3846. Invited and Featured Article.

You, D., Mittal, R., Wang, M. & Moin, P., 2004, Computational Methodology for LargeEddy Simulation of TipClearance Flows.AIAA Journal, Vol. 42, No. 2, pp. 271279.

You, D., Choi, H., Choi, M.R. & Kang, S.H., 1998, Control of FlowInduced Noise Behind a Circular Cylinder Using Splitter Plates.AIAA Journal, Vol. 36, No. 11, pp. 19611967.
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, 6/20042/2005
 Challenge Project Grant, Department of Defense High Performance Computing Modernization Program, 10/20013/2005
 Fellowship, Center for Turbulence Research, NASA/Stanford University, 1999