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An immersed boundary method for simulating dynamic and thermal flows with moving rigid boundary
Chuan-Chieh Liao,Chao-An Lin 한국전산유체공학회 2014 한국전산유체공학회 학술대회논문집 Vol.2014 No.10
In the present study, dynamic and thermal fields with moving rigid boundary are investigated by using an immersed-boundary method. This is achieved via direct momentum and energy forcing on a Cartesian grid by combining “solid-body forcing” at solid nodes and interpolation on neighboring fluid nodes, and issue involving the influence of the solid-body forcing is addressed. Grid-function convergence tests also indicate second-order accuracy of this implementation with respect to the L1-norm in time and the L2-norm in space. 3-D simulation of a heated sphere settling under gravity in a static fluid is adopted to examine the validity of the present technique. All computed results are in generally good agreement with experimental measurements. This indicates the capability of the present simple implementation in solving complex-geometry flow problems.