| Author | Message | ||
     Mehdi Naderi (mnader4) Member Username: mnader4 Post Number: 21 Registered: 12-2006 |
Dear Mr. Nelson, I was talking to you about my problem (solving flow around fluctuated fin). You helped me, and now I am working on it. I will appreciate if you answer my questions about pressure equation: Note: my problem is time dependent 1-For air as fluid around the fin: I used pressure equation of 2d_cyl_piston.pde. P: dt(P) + u*dx(P)+v*dy(P) + gamma*P*(dx(u)+dy(v)) = div(grad(P)) 2- for water as fluid: I used: p: dt(p) +u*dx(p)+v*dy(p)= (p-p0+penalty*rho)*(dx(u)+dy(v)) (I simplified dt(dens) + div(dens*U) = 0 and replaced dens with pressure: dense=(p-p0)/penalty+dens0) Am I right? Regards, Mehdi | ||
| Robert G. Nelson (rgnelson) Moderator Username: rgnelson Post Number: 983 Registered: 06-2003 |
"Right" means that the physical analysis has been correctly posed for the application at hand. PDE Solutions cannot take on the responsibility of doing the analysis for customers' problems. I notice that you have removed the "smoother" coefficient from the div() term in case 1. This is probably wrong. |