Fluctuations in drag co-efficient -- CFD Online Discussion Forums

March 15, 2015, 12:22

Fluctuations in drag co-efficient

PMB7

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Philip

Join Date: Mar 2015

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I am analysing the drag coefficient of a truck. I have increased the domain size, recreated the geometry and refined the mesh, however the drag coefficient continues to fluctuate. I have included an image of the fluctuation of the drag.

Any help would be great thanks!

I am using the k-epsilon realizable turbulence model, the length of the model is 1100 mm and the inlet velocity is 15.94 m/s.

Attached Images

Drag Fluctuation.jpg (20.4 KB, 13 views)

Tags

drag coefficient, fluent, trucks

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