ADAPTTM: GRID REFINEMENT
Starting from a very coarse mesh, ADAPT was used to produce a target mesh resolution for a nozzle with chevrons. In both cases the curvature of the underlying geometry is respected using ADAPT’s projection algorithm.
The generation of a high quality mesh for a complex geometry remains a pacing issue in high-fidelity flow simulation. Large Eddy Simulation (LES) places strict requirements on mesh resolution, element quality, and even the level of allowed mesh anisotropy. In addition, LES meshes are often too large to conveniently manage on even a high-end workstation. ADAPT™ is a massively parallel tool developed in Cascade’s solver infrastructure that gives the user detailed control over the local mesh resolution in their grid. Different from other adaptation tools, ADAPT’s patent-pending directional refinement algorithm only refines elements in the direction or directions necessary to meet target-length scale requirements, dramatically reducing the overall mesh size and also preventing the addition of stiffness to the problem due to excessively small elements.