# Define Re Number with rhoCentralFoam

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 November 1, 2013, 10:29 Define Re Number with rhoCentralFoam #1 Senior Member   Join Date: Dec 2010 Posts: 135 Rep Power: 6 Hi guys, as a beginner, how can I define the Reynoldsnumber for rhoCentralFoam For icoFoam I choosed for Re=10 following parameters: U=(1 0 0) nu = 0.1 D = 1 => Re=20 How can I do this for rhoCentralFoam? Thank you

 November 4, 2013, 05:12 #2 Senior Member     Artur Join Date: May 2013 Location: Southampton, UK Posts: 226 Rep Power: 6 Reynold's number is a fundamental flow property and is independent of what solver or code you're using. So the answer would be: you define it in the same way as you did in the example you've posted (I think you have an error there since 1/0.1 = 10, not 20). Still, since you are asking about rhoCentralFoam, which is a compressible solver, you are probably interested in compressibility and so Mach number of your problem will also be important, amongst other things. Good luck with your case, A eRzBeNgEl likes this.

 November 4, 2013, 08:14 #3 Senior Member   Join Date: Dec 2010 Posts: 135 Rep Power: 6 Thanks, got it already. Re=20 was a silly typo of me :-) Artur likes this.

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