Reason for asymmetry in symmetric geometries -- CFD Online Discussion Forums

June 10, 2010, 02:20	Reason for asymmetry in symmetric geometries	#1
doubtsincfd Senior Member Join Date: Nov 2009 Location: Michigan Posts: 135 Rep Power: 16	say I have a symmetric geometry like a circular cylinder. the grid is perfectly symmetric around the cylinder and the inlet profile is also symmetric. still why do we get alternate vortex shedding? what is the numerical reason? in real life scenario there is some asymmetry in the inlet flow which might trigger the asymmetric vortex shedding. but why does this happen in a perfect cfd simulation?

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