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Supersonic reflexion on 10° wedge

D 1 June 2010    


agrandir

Case description

Shock reflexion in a channel which section is reduced by a 10° wedge. The upstream flow is Mach 2. One can observe (weak) shock reflexions, an expansion fan and its interaction with shock waves.

(highly refined) First order computation

The computation is fully converged to 6 orders of magnitude (local time stepping with explicit integration method). The numerical scheme is the only first order HLLC.
The mesh has been automatically refined 4 times with SPLIT=ISO-TRI option (459k cells).

Second order SVM computation

The computation is fully converged to 6 orders of magnitude (local time stepping with explicit integration method). The numerical scheme is HLLC with 2nd order SVM extrapolation (without limiters). The original mesh has 1792 triangles; the SVM mesh has 5376 (quad) CV.

Ressources

The mesh is available in the mesh repository.

The parameter file (main.rpm) for SVM computation is
BLOCK:PROJECT  
 NZONE     = 1      
 COORD     = 2D      
 TIME      = STEADY
 RESIDUALS = 1.e-6
ENDBLOCK              

BLOCK:OUTPUT  
 FORMAT = VTK-BIN      
 FILE   = "SVM2"
 PERIOD = 1
ENDBLOCK

BLOCK:ZONE    
 NAME   = "wedge10"
 SOLVER = EULER  
ENDBLOCK

BLOCK:MESH
 FORMAT = CGNS
 FILE   = "channelwedge10tri.cgns"
ENDBLOCK

BLOCK:MODEL
 DYNAMICS = EULER
 GAS      = AIR
ENDBLOCK

BLOCK:TIME_PARAM
 RESIDUALS = 0.5
 DTCALC    = LOCAL_STABILITY_CONDITION
 CFL       = 0.5
 CFL_MAX   = 1.
ENDBLOCK

BLOCK:SPAT_PARAM  
 SCHEME   = HLLC
 HIGHRES  = SVM
ENDBLOCK

BLOCK:INIT
 PI      = 1.E5
 TI      = 300.
 MACH    = 2.
 DIRECTION = (1., 0., 0.)
ENDBLOCK

BLOCK:BOCO
 FAMILY    = INLET
 TYPE      = SUPERSONIC_INLET
 PI        = 1.E5
 TI        = 300.
 MACH      = 2.
 DIRECTION = (1., 0., 0.)
ENDBLOCK

BLOCK:BOCO
 FAMILY = TOP
 TYPE   = SYMMETRY
ENDBLOCK

BLOCK:BOCO
 FAMILY = BOTTOM
 TYPE   = SYMMETRY
ENDBLOCK

BLOCK:BOCO
 FAMILY = OUTLET
 TYPE   = SUPERSONIC_OUTLET
ENDBLOCK

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