A high-resolution pressure-based algorithm for fluid flow at all speeds

A new collocated finite-volume-based solution procedure for predicting visc ous compressible and incompressible Rows is presented. The technique is equ ally applicable in the subsonic, transonic, and supersonic regimes. Pressur e is selected as a dependent variable in preference to density because chan ges in pressure are significant at all speeds as opposed to variations in d ensity, which become very small at low Mach numbers. The newly developed al gorithm has two new features: (i) the use of the normalized variable and sp ace formulation (NVSF) methodology to bound the convective fluxes and (ii) the use of a high-resolution scheme in calculating interface density values to enhance the shock-capturing property of the algorithm. The virtues of t he newly developed method are demonstrated by solving a wide range of flows spanning the subsonic, transonic. and supersonic spectrum. Results obtaine d indicate higher accuracy when calculating interface density values using a high-resolution scheme. (C) 2001 Academic Press.