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You are here : eLibrary : IAHR World Congress Proceedings : 32nd Congress - Venice (2007) : THEME B: Data Acquisition and Processing For Scientific Knowledge and Public Awareness. : An improved immersed boundary method for complex geometry environmental flows
An improved immersed boundary method for complex geometry environmental flows
Author : Milici Barbara, Roman Federico, Napoli Enrico, Armenio Vincenzo
Most environmental fluid dynamic processes are characterized by geometric complexity and thus require the use of solvers able to deal with them. In the present paper we present a numerical technique that allows the treatment of geometric complexity still preserving the conservation properties of structured grid, Navier Stokes solvers. First we introduce the direct forcing immersed-boundary method (Mohd-Yusof,1997; Gilmanov et al., 2003; Balaras, 2004), so far employed in conjunction with cartesian grids, and then we propose an extension to curvilinear-coordinate solvers. Additional modifications respect to the state-of-art, which allow to make the interpolation of the velocity field off the body suitable for curvilinear grids, are introduced. A detailed study on the accuracy and efficiency of the method is carried out for the cases of three-dimensional Stokes flow around a sphere and 2D flow around a cylinder placed in a Poiseuille flow.
File Size : 462,891 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 32nd Congress - Venice (2007)
Article : THEME B: Data Acquisition and Processing For Scientific Knowledge and Public Awareness.
Date Published : 01/07/2007
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