Reverse flow on a Presure outlet
Hey guys
I'm teying to run a simulation of a wing and i made a growth function mesh on it, when i go to fluent there is a msg of a reverse flow on the pressure outlet face. Can some one tell me how to simulate it or how could i mesh the wing in order to get the best results.? P.S. I'm using Gambit to mesh it. |
There is a good tutorial of an airfoil.
Well, it's not a wing, but you will get a good overview whats important so such an external flow. |
Hi
it is not a problem if u get a reversed flow.... Tell us more about ure outlet position: is it enough far from the wing???? do u have any vortex schedding??? |
Well the outlet is far enough i think, the thing is that the results that are coming out are not good at all... is good to tell you guys this is a 3D wing.
p.s. thanx for your help. |
well, i dont think the problem is the reverse flow on the pressure outlet ...
are u using steady or unsteady solver?????? wich turbulence model????? wich near wall treatment ?did u verify convergence???? do u have vortex schedding ???? what do u got as results? |
Well I'm using a Pressure Based, steady flow solver, I changed the operating conditions turn on the spalart allmaras viscuos model, and i also changed my convergence to 1E-6.
And my results are negative lift negative drag and a moment that is really out of order... if you have any idea of how I can improove my simulating Ill be realy thankfull. PS. I changed the reference values the area and the temp. |
ure residuals have gone under 10-6????
if yes, i suggest that u use unsteady solver and that u average results then. |
hi
do u have any problem by the reverse flow?
do u have any divergence in residuals? if u have not any problem by above-mentioned please go on and don't wait. in the end boundary u may have some real reverse flow and tiny circulation zone. have u? |
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