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A Hybrid Immersed Boundary Method for the Simulation of Compressible Flows

دومین کنفرانس بین المللی مهندسی متالوژی، مکانیک و معدن
Year: 1400
COI: MMMC02_015
Language: EnglishView: 75
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Seyyed Abolfazl Mousavinia - Shiraz University, Department of Aerospace and Mechanical Engineering
Homayoun Emdad - Shiraz University, Department of Aerospace and Mechanical Engineering


In the present paper, we introduce a new hybrid immersed boundary method (IBM) for the simulation of compressible viscous flows around stationary and moving bodies. The present approach incorporates the Brinkman penalization method and the compressible boundary condition-enforced IBM proposed by Qiu. The boundary condition-enforced IBM uses a fractional step method alongside a smooth Dirac delta function to satisfy the boundary conditions. This method simulates correctly the subsonic flows, although for the supersonic flow cannot physically simulate the wake region. On the other hand, the penalization method considers the body as a porous media with very low permeability, and makes the velocity and energy inside the body to converge to the body velocity and energy. This method works well for subsonic and supersonic regimes, However, unlike Qiu’s method, streamlines penetrate the body and there is no distinctive interface between the flow inside and outside the body. In the presented IBM, the positive features of the two above-mentioned methods are included and their drawbacks are eliminated. After simulation of some test cases, we achieved close agreement between the results of this approach and other numerical and experimental data available in the literature.


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Mousavinia, Seyyed Abolfazl and Emdad, Homayoun,1400,A Hybrid Immersed Boundary Method for the Simulation of Compressible Flows,2nd International Conference on Metallurgical, Mechanical and Mining Engineering,Tehran,

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