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The effect of number of mesh elements on the result was also carry out. Coarse mesh, medium mesh and fine mesh were created and the pressure drop across the turn from each mesh was compared. This analysis will provide confidence on the accuracy of certain mesh. If the changes in mesh elements does not result in a lot of change in pressure coefficient drop, it is concluded that the mesh elements is refine enough that the truncation error can be neglected. Following table shows the summary of 3 meshes created for mesh sensitivity analysis. Please refer back to figure 2 for corresponding design meshing parameters
Mesh | Number of Mesh Elements | Wall Boundary Layer Conditions | Second Mesh Edge | Third Mesh Edge | Fourth Mesh Edge |
|---|---|---|---|---|---|
Coarse | 18762 | First row = 0.003 | Interval size = 0.005007 | Interval size = 0.002No 003 | Interval size = 0.002No 003 |
Medium | 30000 | First row = 0.003 | Interval size = 0.005 | Interval size = 0.002 | Interval size = 0.002 |
Fine | 52260 | First row = 0.003 | Interval size = 0.0050038 | Interval size = 0.002No 0014 | Interval size = 0.002No 0014 |
2.6 Parameterization
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