Three-dimensional boundary conditions for numerical simulations of reactive compressible flows with complex thermochemistry

• Published in: Journal of computational physics Vol. 231; no. 17; pp. 5571 - 5611
• Main Authors: Coussement, Axel, Gicquel, Olivier, Caudal, Jean, Fiorina, Benoît, Degrez, Gérard
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Inc 01.07.2012; Elsevier
• Subjects: Boundary conditions; Characteristic boundary conditions; Combustion; Compressible reactive flows; Computational fluid dynamics; Computational techniques; Corners; Engineering Sciences; Exact sciences and technology; Mathematical methods in physics; Mathematical models; NSCBC; Physics; Reactive fluid environment; Solvers; Strategy; Thermochemistry; Three dimensional; Combustion; Computational fluid dynamics; Characteristic boundary conditions; Compressible reactive flows; NSCBC; Stokes problem; Digital simulation; Boundary conditions; Calculation; Compressible flow; Calculation methods
• ISSN: 0021-9991; 1090-2716
• DOI: 10.1016/j.jcp.2012.03.017

The Navier–Stokes characteristic boundary conditions (NSCBC) is a very efficient numerical strategy to treat boundary conditions in fully compressible solvers. The present work is an extension of the 3D-NSCBC method proposed by Yoo et al. and Lodato et al. in order to account for multi-component reactive flows with detailed chemistry and complex transport. A new approach is proposed for the outflow boundary conditions which enables clean exit of non-normal flows, and the specific treatment of all kinds of edges and corners is carefully addressed. The proposed methodology is successfully validated on various challenging multi-component reactive flow configurations.