期刊
JOURNAL OF COMPUTATIONAL PHYSICS
卷 230, 期 19, 页码 7176-7190出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcp.2011.05.019
关键词
Boundary condition capturing; The immersed interface method; Flow around 3D moving objects
资金
- NSF [DMS 0915237]
To simulate the flow around an object, we can replace the object with the fluid enclosed by a singular force. We can then simulate the flow on a fixed domain with a fluid-fluid interface supporting the singular force. In this paper, we present a boundary condition capturing approach to determine the singular force for a 3D rigid object. We apply a discontinuous body force to enforce the rigid motion of the fluid replacing the object and compute the singular force based on the kinematics of the object. Due to the singular force and the body force, the flow is not smooth across the interface. We solve the flow using the immersed interface method. Our boundary condition capturing immersed interface method is very efficient and stable, and its accuracy based on the infinity norm is near second order for the velocity and above first order for the pressure. (C) 2011 Elsevier Inc. All rights reserved.
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