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Contributor
csjhun
Posts: 16
Registered: ‎06-24-2013

Regional Reynolds Number

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12-16-2013 01:49 PM

Hi,

 

Is there a way to look up the Reynolds number(s) in certain areas? For example, after finishing the simulation for the pump, say, I want to look up the Re around the impeller (I do know that Summary shows the Re for the inlet and outlet though). Is there a way to check the Re for the area?

Thanks in advance.

 

Joe

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Contributor
esmaeilk
Posts: 21
Registered: ‎11-15-2013

Re: Regional Reynolds Number

12-16-2013 04:10 PM in reply to: csjhun
Have you tried the wall calculator in the results tab? you can select the surfaces and get their stats in total and individually.
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Valued Contributor
marco.mueller
Posts: 89
Registered: ‎05-16-2012

Re: Regional Reynolds Number

12-17-2013 07:43 AM in reply to: esmaeilk
there's no such result quantity since the Re number always needs a definition of a typical length and velocity which a software of course cannot create automatically (aside from some basic assumptions for in- and outlets).
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Contributor
csjhun
Posts: 16
Registered: ‎06-24-2013

Re: Regional Reynolds Number

12-17-2013 08:21 AM in reply to: marco.mueller
That's right. I figured. Thanks.
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*Expert Elite*
OmkarJ
Posts: 437
Registered: ‎10-02-2012

Re: Regional Reynolds Number

12-17-2013 11:25 AM in reply to: csjhun

There is a practice to recognize the Peclet number at the local cell to be called as local Reynolds number, since its definition (the ratio of advective to diffusive rate) is close to the definition of Reynolds number (ratio of inertial to viscous force). However, I do not think there is a way to access the local lengthscales and velocity scales (at the cell level) to evaluate the cell Peclet number. This can be particularly useful when you are studying the intermittancy in some areas where it is uncertain if the fluid is turbulent or laminar.

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