V. Parthasarathy et Y. Kallinderis, ADAPTIVE PRISMATIC-TETRAHEDRAL GRID REFINEMENT AND REDISTRIBUTION FORVISCOUS FLOWS, AIAA journal, 34(4), 1996, pp. 707-716
A hybrid grid adaptive algorithm that combines grid refinement and red
istribution suitable for three-dimensional viscous flow simulations is
presented. The flow domain is discretized with both prismatic and tet
rahedral elements. The prismatic region comprises successive layers of
semistructured prisms that encompass regions close to the wall where
the viscous effects are dominant. The grid outside the prismatic regio
n is tessellated with tetrahedra. A hybrid grid adaptation scheme that
implements local refinement and redistribution strategies is develope
d to provide optimum meshes for viscous flow computations. Grid refine
ment on a hybrid grid is a dual adaptation scheme that couples isotrop
ic division of tetrahedra and directional division of prisms. The dire
ctional division of prisms is essentially a two-dimensional grid refin
ement scheme that results in a significant reduction in required compu
ting resources. The grid adaptive solver yields accurate results as co
mpared with a globally refined grid with reduced computing resources.