title: A VERSATILE SHARP INTERFACE IMMERSED BOUNDARY METHOD FOR INCOMPRESSIBLE FLOWS WITH COMPLEX BOUNDARIES.
abstract: 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.
authors.affiliation: Department of Mechanical and Aerospace Engineering The George Washington University Washington DC 20052.
authors.forename: R
authors.initials: R
authors.lastname: Mittal
authors.forename: H
authors.initials: H
authors.lastname: Dong
authors.forename: M
authors.initials: M
authors.lastname: Bozkurttas
authors.forename: F M
authors.initials: FM
authors.lastname: Najjar
authors.forename: A
authors.initials: A
authors.lastname: Vargas
authors.forename: A
authors.initials: A
authors.lastname: von Loebbecke