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A versatile sharp interface immersed boundary method for incompressible flows with complex boundaries
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DOI：10.1016/j.jcp.2008.01.028.png)
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摘要
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A sharp interface immersed boundary method for simulating incompressible viscous flow past three-dimensional immersed bodies is described. The method employs a multi-dimensional ghost-cell methodology to satisfy the boundary conditions on the immersed boundary and the method is designed to handle highly complex three-dimensional, stationary, moving and/or deforming bodies. The complex immersed surfaces are represented by grids consisting of unstructured triangular elements; while the flow is computed on non-uniform Cartesian grids. The paper describes the salient features of the methodology with special emphasis on the immersed boundary treatment for stationary and moving boundaries. Simulations of a number of canonical two- and three-dimensional flows are used to verify the accuracy and fidelity of the solver over a range of Reynolds numbers. Flow past suddenly accelerated bodies are used to validate the solver for moving boundary problems. Finally two cases inspired from biology with highly complex three-dimensional bodies are simulated in order to demonstrate the versatility of the method. (C) 2008 Elsevier Inc. All rights reserved.
Keyword:
computational fluid dynamics
immersed boundary method
ghost-cell
body non-conformal grid methods
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IF:
3.8
论文数:
1.6W
被引数:
7.4W
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