Artículo de revista
Benchmark problems for numerical treatment of backflow at open boundaries
Fecha
2018Registro en:
International Journal for Numerical Methods in Biomedical Engineering Volumen: 34 Número: 2 Número de artículo: e2918
10.1002/cnm.2918
Autor
Bertoglio, Cristóbal
Caiazzo, Alfonso
Bazilevs, Yur
Braack, Malt
Esmaily, Mahdi
Gravemeier, Volker
Marsden, Alison L.
Pironneau, Olivier
Vignon Clementel, Irene E.
Wall, Wolfgang A.
Institución
Resumen
In computational fluid dynamics, incoming velocity at open boundaries, or backflow, often yields unphysical instabilities already for moderate Reynolds numbers. Several treatments to overcome these backflow instabilities have been proposed in the literature. However, these approaches have not yet been compared in detail in terms of accuracy in different physiological regimes, in particular because of the difficulty to generate stable reference solutions apart from analytical forms. In this work, we present a set of benchmark problems in order to compare different methods in different backflow regimes (with a full reversal flow and with propagating vortices after a stenosis). The examples are implemented in FreeFem++, and the source code is openly available, making them a solid basis for future method developments.