Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session R15: CFD: Immersed Boundary Methods I
1:50 PM–3:34 PM,
Monday, November 20, 2023
Room: 144C
Chair: M. Houssem Kasbaoui, Arizona State University
Abstract: R15.00001 : An Improved Sharp-Interface Immersed Boundary Method for Compressible Flows Using State Observers.
1:50 PM–2:03 PM
Presenter:
Mohamed Amine Chemak
(Institut Pprime)
Authors:
Mohamed Amine Chemak
(Institut Pprime)
Marcello Meldi
(Arts et Métiers ParisTech - LMFL)
Eddy Constant
(R.Tech)
In this work, we present a novel sharp-interface IBM which can be easily integrated and used with existing CFD solvers. In the proposed implementation, the solid domain is solved and the immersed boundary conditions (pressure, velocity and temperature) are imposed through optimized source terms in the flow governing equations (mass, momentum and energy equations). These sources are determined via a state observer. This method was implemented in a dedicated C++ library and linked to rhoCentralFoam solver of the open source software OpenFOAM. The simulation of a compressible flow around a sphere at Mach 2 and Reynolds number 300 showed a good agreement with reference results in the literature in terms of the shock standoff distance, the re-circulation bubble size and drag coefficient. In addition, heat exchange features at the surface of the immersed body are also accurately represented.
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