density value in openFoam?

Divyaprakash · October 14, 2015, 07:04

In my simulation I keeping my velocity fixed at 1m/s and instead changing the kinematic viscosity to attain different Reynolds numbers. (Is this a correct approach? If not then please explain why?)

But the value of the density isn't mentioned anywhere? I need the value of the density to calculate the distance of the first grid point. Where can I specify the value of density so that I can use the same for my grid distance calculation? (And can I take any value of density similar to the kinematic viscosity?)

RodriguezFatz · October 20, 2015, 08:57

I guess you are using an incompressible solver, right? There is no density in these solvers, just the kinematic viscosity.

tariq · May 6, 2024, 11:04

Quote:

Originally Posted by RodriguezFatz

I guess you are using an incompressible solver, right? There is no density in these solvers, just the kinematic viscosity.

Thank you very much, it was very helpful!

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October 14, 2015, 07:04	density value in openFoam?	#1
Divyaprakash Member Divyaprakash Join Date: Jun 2014 Posts: 69 Rep Power: 11	In my simulation I keeping my velocity fixed at 1m/s and instead changing the kinematic viscosity to attain different Reynolds numbers. (Is this a correct approach? If not then please explain why?) But the value of the density isn't mentioned anywhere? I need the value of the density to calculate the distance of the first grid point. Where can I specify the value of density so that I can use the same for my grid distance calculation? (And can I take any value of density similar to the kinematic viscosity?)

October 20, 2015, 08:57		#2
RodriguezFatz Senior Member Philipp Join Date: Jun 2011 Location: Germany Posts: 1,297 Rep Power: 26	I guess you are using an incompressible solver, right? There is no density in these solvers, just the kinematic viscosity. tariq likes this. __________________ The skeleton ran out of shampoo in the shower.

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