CFD Results

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Single Baffle

The following Simulation Models were created to compare the flow results for two geometries:

• Single baffle with sharp corners
• Single baffle with round corners

The gallery below shows Below are the results for Static Pressure contours and Velocity Vectors for this geometry:for these geometries.

Two Baffles

Simulation Models were created to compare the flow for two geometries:

• Two baffles with sharp corners
• Two baffles Two baffle with round corners

Below are the The gallery below shows results for Static Pressure contours and Velocity Vectors for this geometry:

As it is expected the pressure drop is larger for the case of straight corners.

these geometries.

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:

1. Comparing the results with a simulation using different momentum discretization method: From 'first order upwind' to 'second order upwind'
2. 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'
3. Comparing Simulation results to experimental data

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