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August 8, 2012, 02:20 |
Set up a wind velocity for an experiment.
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#1 |
New Member
Join Date: Aug 2012
Posts: 17
Rep Power: 13 |
I'm using ElmerGUI as cfd software and I want to set up the velocity of the flow (wind). I understand this instruction of a tutorial is to create a parabolic profile of the flow in velocity 1...
Model BoundaryCondition Name = Inlet Navier-Stokes Velocity 1 = Variable Coordinate 2; Real MATC "4* 1.5 * tx * (0.41-tx)/0.41^2" Velocity 2 = 0.0 Add New I understand that this equation (for a experiment 2D in a channel) "4* 1.5 * tx * (0.41-tx)/0.41^2" represents this profile: I would need a equation for this kind of profile: That is for a curve of a boundary layer. Someone know how will be the equation for this curve to work with Elmer? |
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August 15, 2012, 08:17 |
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#2 |
Senior Member
Rami Ben-Zvi
Join Date: Mar 2009
Posts: 155
Rep Power: 17 |
Hi Bitacovir,
I have no access to Elmer manuals at the moment, so forgive me if the syntax is not exact. Suppose - for example - that your axial velocity, U, is parabolic in the transverse coordinate, y, with U = 1*y^2 + 2*y + 3 then use $A = 1. $B = 2. $C = 3. Velocity 1 = Variable Coordinate 2; Real MATC " $A * tx^2 + $B * tx + $C" Sorry if I omitted a dollar or two...
Rami Last edited by Rami; August 16, 2012 at 05:27. |
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August 16, 2012, 05:51 |
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#3 | |
New Member
Join Date: Aug 2012
Posts: 17
Rep Power: 13 |
Quote:
Thanks a lot. I going to try this suggestion. Currently I was using http://www.comflow.nl/ that is easier to set up Inlet conditions such as profile of wind. Here one example that I was doing... Kind Regards. |
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