An isogeometric b-rep mortar-based mapping method for non-matching grids in fluid-structure interaction

Abstract In this study the isogeometric B-Rep mortar-based mapping method for geometry models stemming directly from Computer-Aided Design (CAD) is systematically augmented and applied to partitioned Fluid-Structure Interaction (FSI) simulations. Thus, newly proposed methodology geometries described by their Boundary Representation (B-Rep) in terms of trimmed multipatch Non-Uniform Rational B-Spline (NURBS) discretizations as standard modern CAD. The herein extended transformation fields between a model low order discrete surface representation which typically results when Finite Volume Method (FVM) or Element (FEM) are employed. This enables such tractions displacements along FSI interface Isogeometric Analysis (IBRA) used structural discretization FVM fluid discretization. latter allows diverse schemes Value Problem (BVP), taking into consideration special properties each BVP separately while constraints satisfied an iterative manner within FSI. can be exploited problems with IBRA FEM frame Exact Coupling Layer (ECL) where smoothed using underlying parametrization, thus advantage smoothness that NURBS basis functions offer. All new developments investigated demonstrated lightweight structures whereby geometric parametrizations taken real-world CAD models, extending coupled type.