An AUSM-based high-order compact method for solving Navier-Stokes equations

• Main Authors: Mawlood M.K., Basri S.N., Asrar W., Omar A.A., Mokhtar A.S., Ahmad M.M.H.M.
• Other Authors: 6507670187
• Format: Article
• Published: 2023
• Subjects: Differential equations; Dynamics; Gases; Algorithms; Boundary layers; Finite difference method; Functions; Laminar flow; Navier Stokes equations; Shock waves; Two dimensional; High order compact unwind algorithm; Two space dimensions; Aerospace engineering
• Institution: Universiti Tenaga Nasional

A high-order compact upwind algorithm is developed for solving Navier-Stokes equations in two-space dimensions. The method is based on advection upstream splitting method and fourth-order compact finite-difference schemes. The convection flux terms of the Navier-Stokes equations are discretized by a compact cell-centered differencing scheme while the diffusion flux terms are discretized by a central fourth-order compact scheme. The midpoint values of the flux functions required by the cell-centered compact scheme are determined by a fourth-order MUSCL approach. For steady-state solutions; first-order implicit time integration, with LU decomposition, is employed. Computed results for a laminar flow past a flat plate and the problem of shock-wave boundary layer interaction are presented.