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-   -   Reynolds Number- CFX Solver (http://www.cfd-online.com/Forums/cfx/71114-reynolds-number-cfx-solver.html)

Jwolf December 15, 2009 19:35

Reynolds Number- CFX Solver
 
As the CFX calculates I number of Reynolds? formulates it uses it conventional? according to I have understood calculates the RE node-node but the values of a calculated value theoretically and the one that is observed in solver to manager are very different 1e5 theoretical ---- 7,3e5 CFX to solver?

I must work with the theory or adjust to which leaves in solver?

ghorrocks December 15, 2009 23:30

The Re number reported in the solver is based on a length scale defined as the cube root of the total solution volume, and averaged velocities and material properties. This is not a useful definition of Re for comparison to literature so you must define a Re based on the length, velocity and material properties you define.

Jwolf December 16, 2009 10:07

thanks Glenn...

yingye December 19, 2009 04:52

it doesn't work

rogbrito December 20, 2009 17:28

http://www.4shared.com/file/12861259...ldsNumber.html
:rolleyes:


Quote:

Originally Posted by Jwolf (Post 240137)
As the CFX calculates I number of Reynolds? formulates it uses it conventional? according to I have understood calculates the RE node-node but the values of a calculated value theoretically and the one that is observed in solver to manager are very different 1e5 theoretical ---- 7,3e5 CFX to solver?

I must work with the theory or adjust to which leaves in solver?


adam_annie January 23, 2010 20:07

How to set the boundary of airfoil
 
hi, everyone. I am not familiar with CFX and these days i try to learn how to use CFX to calc the airfoil, wing and other more complicated configures. I have got a RAE2822 airfoil grids by ICEM and my problem is how to set the proper boundaries in CFX. From the literatures I have read, there are two different kinds of boundaries setting. First, set the farfield as OPENING, setting static pressure and velocity. Another is set VELOCITY INLET and PRESSURE OUTLET. Set velocity in INLET and average pressure in OUTLET. I am confused about which one is proper. The tutorial says OPENING boundary only can be used in subsonic. So if i want to simulate a transonic case, do I have to choose VELOCITY INLET and PRESSURE OUTLET? Thanks a lot.


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