Week 5: Prandtl Meyer Shock problem
Objective:
- Effect of SGS parameter on shock location
In the Prandtl Meyer shock problem, look at the effect of SGS temperature value on cell count and the shock location
It is expected to show the mesh generation using PARAVIEW.
Also create an animation and upload it on You tube and provide the You tube link for an animaion in your report.
Answer:
Scaling Geometry
Case Setup
Material
Gas Simulation
Gas Transport Parameters
Reaction Mechanism
Run Parameters
Steady State Monitor
Simulation Time Parameters
Solver Parameters
Boundary Conditions
Inlet
outlet
Front
Back
Top
Bottom
Regions & Initialization
Initial velocity is fixed at 680 m/s.
Turbulence Modeling
Grid Control
Base Grid
Adaptive Mesh Refinement
SGS = 0.05
Initially sub grid criterion has been kept at 0.05 to make the chnages in the element sizes with respect to change in temperature.
The max embedding level is kept at 2. The maximum fineness of the mesh will be calcualted using below formula.
`"base grid" = ("base grid size")/2^("max embedding level")`
Ouput
Post Variable Selection
Output Files
Results
Post-conversion
Mesh
Velocity Contour
Pressure Contour
Temperature Contour
Plots
Avg. Velocity
Pressure
Mass Flow Rate - from Inlet
Animation
Total Cell Count
For SGS = 0.05
Max Cell Count = 7000
For SGS 0.03
Mesh
Total Cell Count
Max = 17543
For SGS 0.07
Mesh
Total Cell Count
Max cells = 5114
As it can be seen from the above results that as the SGS (Sub Grid Criterion) is getting increased, the number of cells & quality of the mesh is decreasing. The mesh of SGS 0.03 has very fine mesh quality compare to others.