Lattice Boltzmann method for compressible fluid flow and drag simulations

Abstract: This talk discusses the use of the lattice Boltzmann method (LBM) for compressible fluid flow and its application in approximating drag and lift coefficients of objects. A brief overview of fluid dynamics is followed by an explanation of the LBM. Entropic LBM and multi-speed velocity models used to simulate compressible fluid flow are described, along with a generalization of their boundary conditions and a benchmark problem. Next, an algorithm for numerically computing the drag and lift coefficients specific for the LBM grid is derived for both incompressible and compressible flows. Finally, a numerical study is performed for flow around a cylinder and a NACA profile with the multi-speed ELBM model, reference single-speed LBM models and the finite volume method compared with results from published studies.

MathematicsPhysics

Audience: researchers in the topic

Nečas Seminar on Continuum Mechanics

Series comments: This seminar was founded on December 14, 1966.

Faculty of Mathematics and Physics, Charles University, Sokolovská 83, Prague 8. If not written otherwise, we will meet on Mondays at 15:40 in lecture hall K3 (2nd floor)