Reynolds Number

Loris88 · October 10, 2013, 14:11

Hello everyone!
Thanks in advance for who will reply at this question!
I use Ansys 14.0.
I have introduced my mesh in CFX-Pre...then I have assigned boundary conditions. At the inlet, I have placed the velocity. This velocity is an input known of my problem as the Reynolds number that I have it.
When I start with CFX-Solver, I read that the Reynolds number is different respect the Reynolds that I have. The problem is that Ansys calculates the Global Length with a number that I do not know from where it comes. Ansys Global Length is 5.7927E-02.

My Global Length is 5.0E-0.2. (This is the correct number).
How may I correct this error with Ansys? If I have to write an expression in CFX-Pre, how can I do that?
Please, you do not say me "See Help or Tutorial", because I have already done but I did not understood nothing.

Thanks

ghorrocks · October 10, 2013, 18:23

I should write a FAQ on this, but in the meantime try this post: http://www.cfd-online.com/Forums/cfx...umber-cfx.html

Loris88 · October 11, 2013, 04:56

Quote:

Originally Posted by ghorrocks

I should write a FAQ on this, but in the meantime try this post: http://www.cfd-online.com/Forums/cfx...umber-cfx.html

Thank you!
The link that you have given me it has been useful!

October 10, 2013, 14:11	Reynolds Number	#1
Loris88 New Member Loris Join Date: Sep 2013 Posts: 17 Rep Power: 13	Hello everyone! Thanks in advance for who will reply at this question! I use Ansys 14.0. I have introduced my mesh in CFX-Pre...then I have assigned boundary conditions. At the inlet, I have placed the velocity. This velocity is an input known of my problem as the Reynolds number that I have it. When I start with CFX-Solver, I read that the Reynolds number is different respect the Reynolds that I have. The problem is that Ansys calculates the Global Length with a number that I do not know from where it comes. Ansys Global Length is 5.7927E-02. My Global Length is 5.0E-0.2. (This is the correct number). How may I correct this error with Ansys? If I have to write an expression in CFX-Pre, how can I do that? Please, you do not say me "See Help or Tutorial", because I have already done but I did not understood nothing. Thanks

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October 10, 2013, 18:23		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	I should write a FAQ on this, but in the meantime try this post: http://www.cfd-online.com/Forums/cfx...umber-cfx.html