Finding Re Number

faisal_durr · August 10, 2011, 06:56

Hello, I am running a test case in Ansys CFX. During solver right at the beginning one gets these numbers for the domains in which they also give a value for the Re number. Is this the final Re number of my test case? I mean the Re number is dependent on the mean value of velocity inside the domain. So even before the simulation has reached convergence and ended and a final value of mean velocity is found how can they give the Re at the beginning of the simulation. If there is another way of finding the Re number for a test case via ANSYS CFX and not through math please tell. Thank you so much.

Josh · September 5, 2011, 15:12

This is the solver Reynolds number. Read about it in the Help files. In general, I ignore it. Calculate your Reynolds number based on the mean flow and a characteristic length.

August 10, 2011, 06:56	Finding Re Number	#1
faisal_durr Member Faisal Durrani Join Date: Nov 2009 Location: England Posts: 62 Rep Power: 17	Hello, I am running a test case in Ansys CFX. During solver right at the beginning one gets these numbers for the domains in which they also give a value for the Re number. Is this the final Re number of my test case? I mean the Re number is dependent on the mean value of velocity inside the domain. So even before the simulation has reached convergence and ended and a final value of mean velocity is found how can they give the Re at the beginning of the simulation. If there is another way of finding the Re number for a test case via ANSYS CFX and not through math please tell. Thank you so much.

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September 5, 2011, 15:12		#2
Josh Senior Member Joshua Counsil Join Date: Jul 2009 Location: Halifax, Nova Scotia, Canada Posts: 366 Rep Power: 18	This is the solver Reynolds number. Read about it in the Help files. In general, I ignore it. Calculate your Reynolds number based on the mean flow and a characteristic length.