Galilean Invariant

April 1, 2000, 11:16

Hi friends,

In the literature, I have seen the following term: ``non-Galilean invariant''. It appeared in a paper on K-Epsilon turbulence model that uses y in the damping function instead of y+. Please, what means Galilean Invariance?

Thanks.

April 1, 2000, 18:03

Galilean Invariance means that the model must not be affected by a Galilean transformation. A Galilean transformation is a change of reference frame from one coordinate system to another moving with a constant velocity relative to the original. Everything in classical physics is Galilean invariant so all good models should also be Galilean invariant in order to be correct.

hivorcus · September 19, 2017, 08:57

If, for a wind turbine I use a rotating mesh does this instantly mean that the simulation is not 'Galilean Invariant' ???

April 1, 2000, 11:16	Galilean Invariant	#1
Valdemir G. Ferreira Guest Posts: n/a	Hi friends, In the literature, I have seen the following term: ``non-Galilean invariant''. It appeared in a paper on K-Epsilon turbulence model that uses y in the damping function instead of y+. Please, what means Galilean Invariance? Thanks.

April 1, 2000, 18:03	Re: Galilean Invariant	#2
Jonas Larsson Guest Posts: n/a	Galilean Invariance means that the model must not be affected by a Galilean transformation. A Galilean transformation is a change of reference frame from one coordinate system to another moving with a constant velocity relative to the original. Everything in classical physics is Galilean invariant so all good models should also be Galilean invariant in order to be correct.

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September 19, 2017, 08:57		#3
hivorcus New Member Ukraine Join Date: Apr 2017 Posts: 3 Rep Power: 8	If, for a wind turbine I use a rotating mesh does this instantly mean that the simulation is not 'Galilean Invariant' ???