A high-order hybrid finite difference–finite volume approach with application to inviscid compressible flow problems: A preliminary study

2014 ◽  
Vol 98 ◽  
pp. 91-110 ◽  
Author(s):  
Xianyi Zeng
Keyword(s):  
Finite Difference ◽  
Compressible Flow ◽  
Finite Volume ◽  
High Order ◽  
Flow Problems ◽  
Preliminary Study ◽  
Finite Volume Approach ◽  
Inviscid Compressible Flow

A hybrid numerical method and its application to inviscid compressible flow problems

2014 ◽  
Vol 185 (2) ◽  
pp. 479-488 ◽  
Author(s):  
Ghislain Tchuen ◽  
Ferdinand Fogang ◽  
Yves Burtschell ◽  
Paul Woafo
Keyword(s):  
Numerical Method ◽  
Compressible Flow ◽  
Flow Problems ◽  
Hybrid Numerical Method ◽  
Inviscid Compressible Flow

An accurate shock-capturing scheme based on rotated-hybrid Riemann solver

2016 ◽  
Vol 26 (5) ◽  
pp. 1310-1327 ◽  
Author(s):  
Ghislain Tchuen ◽  
Pascalin Tiam Kapen ◽  
Yves Burtschell
Keyword(s):  
Compressible Flow ◽  
Finite Volume ◽  
Compressible Flows ◽  
Navier Stokes ◽  
Shock Propagation ◽  
Riemann Solver ◽  
Simple Task ◽  
Content Type ◽  
Flow Problems ◽  
Roe Solver

Purpose – The purpose of this paper is to present a new hybrid Euler flux fonction for use in a finite-volume Euler/Navier-Stokes code and adapted to compressible flow problems. Design/methodology/approach – The proposed scheme, called AUFSRR can be devised by combining the AUFS solver and the Roe solver, based on a rotated Riemann solver approach (Sun and Takayama, 2003; Ren, 2003). The upwind direction is determined by the velocity-difference vector and idea is to apply the AUFS solver in the direction normal to shocks to suppress carbuncle and the Roe solver across shear layers to avoid an excessive amount of dissipation. The resulting flux functions can be implemented in a very simple manner, in the form of the Roe solver with modified wave speeds, so that converting an existing AUFS flux code into the new fluxes is an extremely simple task. Findings – The proposed flux functions require about 18 per cent more CPU time than the Roe flux. Accuracy, efficiency and other essential features of AUFSRR scheme are evaluated by analyzing shock propagation behaviours for both the steady and unsteady compressible flows. This is demonstrated by several test cases (1D and 2D) with standard finite-volume Euler code, by comparing results with existing methods. Practical implications – The hybrid Euler flux function is used in a finite-volume Euler/Navier-Stokes code and adapted to compressible flow problems. Originality/value – The AUFSRR scheme is devised by combining the AUFS solver and the Roe solver, based on a rotated Riemann solver approach.

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