# How to set Reynolds value in Ansys 14.0

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 September 26, 2013, 06:25 How to set Reynolds value in Ansys 14.0 #1 New Member   Join Date: Sep 2013 Posts: 4 Rep Power: 6 Hello everybody! I kindly ask you all if somebody knows if there is a way for setting a particular Reynolds value in Ansys 14.0 (noncommercial use), and if it was affermative, what steps I have exactly to follow to set it. Thank you in andvance for helping me. Ferdy

 September 26, 2013, 08:28 #2 Senior Member   Lance Join Date: Mar 2009 Posts: 619 Rep Power: 15 CFX is a dimensional solver, so there is no way you can enter a Reynolds number directly. You can obtain a specific Re by setting boundary conditions and fluid properties, but since you havent described what you are trying to do we cant help you.

 September 26, 2013, 09:12 #3 New Member   Join Date: Sep 2013 Posts: 4 Rep Power: 6 Thank you for the reply. Actually the problem is that we are studying a flow of air in a channel at constant temperature, we have got this inlet conditions at the entry of the channel: Re = 80.000 characteristic length (h) = 0,05 m kinematic viscosity (v)=1,5*10^-5 m^2/s inlet velocity (u)=24 m/s The problem is that this value of the kinematic viscosity of the air at pressure of 1 bar should correspond at a temperature that lies between 16 and 17 °C, but automatically Ansys has got only air at 25°C in its library of fluids, or water, or ideal gas. I hope this is not a restriction because of the fact we are using a noncommercial version of Ansys (student version). If there is a way of modifying the tempearture of the air from "default domain" -> basic settings -> "fluid and particle definition" we should be able to upload a new fluid (add new item) but we don't know how to do this. Thank you very much.

 September 26, 2013, 09:29 #4 Senior Member   Lance Join Date: Mar 2009 Posts: 619 Rep Power: 15 so.... your question boils down to how to create a new material? See any of the tutorials on how to change/modify material properties. It is straightforward. I doubt that the student version has a restriction on creating new materials.

 September 27, 2013, 09:26 #5 New Member   Join Date: Sep 2013 Posts: 4 Rep Power: 6 Thank you!we have been able to solve our library problem...thank you...

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