Vorticity and Viscosity

bolus13 · October 27, 2014, 04:49

Hi All,

For a work project I need to revive my aerodynamics knowledge again. Can somebody help me with the distinction between vorticity and viscosity.

If a flow vorticity is not equal to zero, the flow is called rotational and the flow elements have a finite angular velocity. But does this also imply the flow is viscous. And vice versa, if viscosity is taken into account, can a flow be irrotational?

Thanks.

FMDenaro · October 27, 2014, 05:51

Vorticity is a flow field, it obeys to an evolution equation that can be written also for zero viscosity...

October 27, 2014, 04:49	Vorticity and Viscosity	#1
bolus13 Member Ruud Caljouw Join Date: Dec 2012 Posts: 45 Rep Power: 13	Hi All, For a work project I need to revive my aerodynamics knowledge again. Can somebody help me with the distinction between vorticity and viscosity. If a flow vorticity is not equal to zero, the flow is called rotational and the flow elements have a finite angular velocity. But does this also imply the flow is viscous. And vice versa, if viscosity is taken into account, can a flow be irrotational? Thanks.

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October 27, 2014, 05:51		#2
FMDenaro Senior Member Filippo Maria Denaro Join Date: Jul 2010 Posts: 6,896 Rep Power: 73	Vorticity is a flow field, it obeys to an evolution equation that can be written also for zero viscosity...