Hybrid grid generation for viscous flow simulations in complex geometries

An automatic unstructured grid generation method for viscous flow simulations

High aspect-ratio grids are required for accurate solution of boundary layer and wake flow. An approach for the efficient generation f isotropic and stretched viscous unstructured grids is introduced in this paper. The proposed grid generation algorithm starts with very coarse initial grid. In far field regions, isotropic cells of excellent quality are produced using a combination of point inse...

Hybrid Mesh Generation for Viscous Flow Simulation

This paper presents a robust and automated approach to generate unstructured hybrid grids comprised of prismatic and tetrahedral elements for viscous flow computations. The hybrid mesh generation starts from a triangulated surface mesh. The prismatic elements are extruded based on the weak solutions of the Eikonal equation to generate anisotropic elements at boundaries, and finally the isotropi...

Cartesian Grid Methods for Fluid Flow in Complex Geometries 1

Biological uid dynamics typically involves geometrically complicated structures which are often deforming in time. We give a brief overview of some approaches based on using xed Cartesian grids instead of attempting to use a grid which conforms to the boundary. Both nite-diierence and nite-volume methods are discussed, as well as a combined approach which has recently been used for computing in...

Hybrid Methods for Unsteady Fluid Flow Problems in Complex Geometries

Octree-based Hexahedral Mesh Generation for Viscous Flow Simulations

The present paper describes an unstructured hexahedral mesh generator for viscous flow simulations around complex 3D configurations. The first step of this method is the geometric adaptation of an initial non-body-fitted mesh by grid embedding. The resulting octree mesh is then fitted to the actual boundaries of the domain and its main features, such as sharp edges and corners, are captured. De...