Weak steady Mach reflections are numerically simulated using unstructured grids by means of either "shock-fitting" or "shock-capturing" techniques. It is shown that shock-fitting allows using coarser meshes than those required by shock-capturing, since the latter needs mesh refinement in the direction normal to the discontinuities, which is not needed using the former approach. The shock-fitted solution is also free from the numerical disturbances that arise along the captured discontinuities and pollute the captured solution in the smooth flowfield region. Finally, the shock-fitting solutions show the presence of a small region next to the Mach stem and the reflected shock downstream of the triple point, characterized by very high gradients.
Computation of weak steady shock reflections by means of an unstructured shock-fitting solver / Mikhail S., Ivanov; Aldo, Bonfiglioli; Paciorri, Renato; Sabetta, Filippo. - In: SHOCK WAVES. - ISSN 0938-1287. - STAMPA. - 20:4(2010), pp. 271-284. [10.1007/s00193-010-0266-y]
Computation of weak steady shock reflections by means of an unstructured shock-fitting solver
PACIORRI, Renato;SABETTA, Filippo
2010
Abstract
Weak steady Mach reflections are numerically simulated using unstructured grids by means of either "shock-fitting" or "shock-capturing" techniques. It is shown that shock-fitting allows using coarser meshes than those required by shock-capturing, since the latter needs mesh refinement in the direction normal to the discontinuities, which is not needed using the former approach. The shock-fitted solution is also free from the numerical disturbances that arise along the captured discontinuities and pollute the captured solution in the smooth flowfield region. Finally, the shock-fitting solutions show the presence of a small region next to the Mach stem and the reflected shock downstream of the triple point, characterized by very high gradients.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.