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Single Baffle
Simulation Models were created to compare the flow results for two geometries:
- Single baffle with sharp corners
- Single baffle with round corners
In the The gallery below are the shows results for Static Pressure contours and Velocity Vectors for these geometries. As expected the pressure drop is larger for the case of straight corners.
Models for a Two Baffles
Two Baffles
Simulation Models were created to compare the flow for two geometries:
- Two baffles Single baffle with sharp cornersSingle baffle
- Two baffles with round corners
In the The gallery below are the shows results for Static Pressure contours and Velocity Vectors for these geometries. As expected the pressure drop is larger for the case of straight corners.
These results are only preliminary. To validate them we plan to take the following steps:
Mesh Refinement
A standard outlet pressure was set for the Double Baffle Straight Edge geometry for validation. Also a Mesh Sensitivity analysis was performed. The Mesh was refined from 3,663 cells to 14,652 cells to 58,608 cells. Results are plotted for a straight horizontal line at the middle of each baffle. These results are for Velocity Magnitude and Pressure Coefficient. Furthermore a contour of the strain rate was created to show shear velocity gradients around the 180 degree bend.
These results will be further validated by:
- Comparing the results with a simulation using different momentum discretization method: From 'first order upwind' to 'second order upwind'
- Comparing the results with a simulation using a different viscous turbulent model: From 'k-epsilon standard' to 'k-epsilon realizable' to 'k-omega'. Also vary the Near Wall Treatment: from 'Standard Wall Functions' to 'Enhanced Wall treatment'
- Comparing
- Set a standard outlet pressure for all geometries
- Perform a mesh sensitvity analysis
- Compare Simulation results to experimental data
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