Author(s)

J. A. Gomez , R. L¨ohner , J. Rojek &E. O˜nate

Abstract

This paper describes the coupling of FEFLO, a general purpose compressible and incompressible flow solver based on adaptive unstructured grids, with SIMPACT, a general purpose, large deformation, explicit structural dynamics code developed at the Center for Numerical Methods in Engineering (CIMNE). Details on the codes as well as the coupling strategy employed are given. An example illustrates the possibilities the coupled codes offer. 1 Introduction The ability to predict accurately fluid-structure interaction problems is of fundamental importance for design, analysis and reconstruction inmany areas of mechanical and civil engineering. In order to characterize the effects of an accidental or intentional explosion close to a building, a coupled fluid-structure interaction calculation has to be carried out. The present effort presents the coupling of FEFLO, a general purpose CFD solver with SIMPACT, a general purpose explicit CSD code. 2 FEFLO FEFLO was conceived as a general-purpose CFD code based on the following general principles: - Use of unstructured grids (automatic grid generation and mesh refinement). - Finite element discretization of space. - Separate flow modules for compressible and incompressible flows.

Keywords