# Vorticity generation in oodles

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 September 29, 2007, 10:55 Hi guys I'm studing the effec #1 Senior Member   Marhamat Zeinali Join Date: Mar 2009 Location: Tehran, Tehran, iran Posts: 107 Rep Power: 9 Hi guys I'm studing the effect of adding body force(F) to oodles solver. Where F is exponential function: F= A*exp(B*(x^2+y^2+z^2) that i force it to my case geometry center for only 1 iteration . A & B are constants. My study case is a channel with uniform inlet velocity(=10m/s).and the sides are symmetryplane. ...... so i changed oodles solver: if (momentumPredictor) { solve(UEqn == -fvc::grad(p)+Fcoefficient*F); } Where Fcoefficient changes between 0&1 for iteration control.so it is 1 for only 1 iteration You can see some figures that shows the vorticty variation with time changing in flow : : : : : : : How i can explan the variation of vorticity distribution by time changing? Can you explan me more detailes in this field ? Have a nice weekend Marhamat

 September 29, 2007, 11:09 sorry for duplicate sending : #2 Senior Member   Marhamat Zeinali Join Date: Mar 2009 Location: Tehran, Tehran, iran Posts: 107 Rep Power: 9 sorry for duplicate sending : : : : : :

 September 29, 2007, 18:06 Sorry again for disturbing you #3 Senior Member   Marhamat Zeinali Join Date: Mar 2009 Location: Tehran, Tehran, iran Posts: 107 Rep Power: 9 Sorry again for disturbing you. )-: I promise to be a good boy and not to do it again.(-; Regards Marhamat

 October 9, 2007, 08:20 Hi everybody I hope that some #4 Senior Member   Marhamat Zeinali Join Date: Mar 2009 Location: Tehran, Tehran, iran Posts: 107 Rep Power: 9 Hi everybody I hope that somebody help me in this problem . I repeated the noted steps in icoFoam solver. In first iteration after adding F the figure of vorticity is like to fig of vorticity in oodles solver but in this solver the spots of vorticity don't increase by time increasing in flow and we can see difusion of vorticity . I must note that when velocity is zero in first iteration the figure of vorticity is different. How i can justify these differences? Best Regards Marhamat

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