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too dense mesh deteriorates the simulation

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Old   June 29, 2015, 20:38
Default too dense mesh deteriorates the simulation
Kai Zhang
Join Date: Jan 2013
Location: yokohama, Japan
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I'm using pimpleFoam to simulate the flow around a circular cylinder. I found that many times that if a dense mesh is used for a low Reynolds number simulation, say Re=100, the simulation is not physically correct(in terms of the drag or lift force coefficients). However, if I maintain the same mesh and raise the reynolds number to like 1000, the simulation seems to go well.

does someone else also have the same experience with me?
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