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For each mesh, take note of the drag coefficient and compare with each other.

We clearly see a difference in the drag coefficients, as the "Fine" case moves closer to the Experimental Data.

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Click Plot. (If you cannot run the longer mesh, HERE is the XY file for the fine mesh so you can load it into the coarser mesh case and see the results next to each other).

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We see that the Pressure Coefficient doesn't change all that much, so the correlation between mesh density and Pressure Coefficient accuracy is not that strong (but only for this case). The key difference lies in the change in the Drag coefficients we found earlier.

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