Modeling and Simulations of Transitional and Turbulent Compressible Flows

Abstract

Prof. Sidharth GS will present an overview of ongoing research in computational compressible flow group at Iowa State. Their objective is to establish engineering simulations of high-speed aerodynamics and propulsion based on first principles.

The seminar will focus on two pivotal investigations:

• Modeling Turbulent Transport in Compressible Flows: 
  The group develop a new form of Reynolds-filtered equations that avoids unclosed high-order variable-density terms and derive exact gradient transport expressions for variable-density flows. These models improve the subgrid treatment of turbulence in compressible reacting environments.
  

• Instability and Receptivity in Shock–Boundary Layer Interactions: 
  Using global linear stability and sensitivity analyses, the group investigate the onset of unsteady fluctuations and three-dimensional instabilities in laminar shock–boundary layer interactions. These studies help interpret experimental observations and inform design and control strategies for high-speed flight.

Speaker

Prof. Sidharth GS is an Assistant Professor at the Department of Aerospace Engineering at Iowa State University and works on computational gas dynamics. He received his PhD at the University of Minnesota specialising in modeling of compressible reacting flows and was a postdoctoral researcher at the Los Alamos National Laboratory where he worked to model turbulent mixing at multimaterial interfaces.