Sanjeeb Bose

Most fluid flows of engineering interest, ranging from aerodynamics to weather patterns, are turbulent. The scale separation between the largest and smallest relevant length scales is several orders of magnitude, and this coupled with its three-dimensional nature make numerical simulations difficult. Although computers have gotten considerably faster, direct simulation of practical flows, such as atmospheric and oceanographic flows, is still decades away. Large-eddy simulation (LES) addresses this issue by directly simulating the large-scale motions of the flow field, while providing a model for the effect of smaller motions. This approach has shown success for many turbulent flows, including combustion applications, turbomachinery, and a variety of wall-bounded flows.

Large-eddy simulation has also shown sensitivity to the underlying numerical grid, especially for flows involving complex geometries. I develop methods to compute grid-independent solutions for large-eddy simulation to help increase the reliability and robustness of turbulent fluid flow simulations. I am also currently working on extending these methods to unstructured mesh environments for future application to complex geometries, such as multi-element airfoils. A grid-independent framework for LES allows for the isolation of the error induced by the model used to describe the effect of the small-scale motions (subgrid scale models). My research also entails the development of novel subgrid closure models for more accurate descriptions of turbulence.

Journal Articles

S.T. Bose, P. Moin, & D. You, Grid-independent large-eddy simulation, under review for Phys. Fluids.

Technical Reports & Conference Proceedings

S.T. Bose, P. Moin, Grid-independent LES, 62nd Annual Meeting of the Division of Fluid Dynamics, American Physical Society, 2009.
S.T. Bose, P. Moin, & D. You, Grid-independent large-eddy simulation using explicit filtering, Center for Turbulence Research Annual Research Briefs, 2008.
S.T. Bose, P. Moin, & D. You, Grid-independent large-eddy simulation, 61st Annual Meeting of the Division of Fluid Dynamics, American Physical Society, 2008.