CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   Main CFD Forum (http://www.cfd-online.com/Forums/main/)
-   -   AVL fire Exhaust manifold Simulation (http://www.cfd-online.com/Forums/main/76137-avl-fire-exhaust-manifold-simulation.html)

mohsenfjs May 15, 2010 11:51

AVL fire Exhaust manifold Simulation
 
hello every body

I have been using AVL fire as my CFD tool for some years now and I have done some simulations with it. right now I'm trying to simulate the exhaust flow through a Diesel engine manifold for some Heat transfer calculations and since the engine is turbo charged the mass flow is a bit high and the flow is around mach 0.3.

my problem is that i can't get a converged solution and i should say that i'm doing a transient simulation over an exhaust stroke. I use AVL boost mass flow and temperature results as boundary conditions on inlet and my outlet is simply a static pressure with a non fixed temperature boundary. walls are just fixed temperature and the mesh quality i think is pretty good.my problem is that all my simulation diverge after some some time steps which each of them is like 1 Crank angle as the engine is at 2500 rpm.
I would really appreciate if any one could help me on this case and would love to have discussions on IC engine oriented simulation with AVL fire.

Thanks guys


All times are GMT -4. The time now is 20:27.