A coupled finite volume method and Gilbert-Johnson-Keerthi distance algorithm for computational fluid dynamics modelling

摘要

We investigate a novel technique to obtain the mesh porosity (volume and area) based on the Gilbert-Johnson-Keerthi (GJK) distance algorithm for flow modelling. The GJK algorithm is used to check collisions between two convex objects. This concept is applied to check the collision between an element of the computational mesh and the geometrical model where the element of the mesh is broken recursively to obtain refined values of the porosity. The approach has demonstrated that it can handle complex geometries within feasible computational time. The porosity values obtained using this methodology are coupled in the developed Navier-Stokes. Numerical findings are compared with selected benchmarking tests. Numerical findings agree with experimental data and the main features of the fluid flow are well captured. (C) 2019 Elsevier B.Y. All rights reserved.