CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   OpenFOAM Running, Solving & CFD (http://www.cfd-online.com/Forums/openfoam-solving/)
-   -   Using simulation results as time-resolved boundary condition (http://www.cfd-online.com/Forums/openfoam-solving/109331-using-simulation-results-time-resolved-boundary-condition.html)

vainilreb November 15, 2012 05:52

Using simulation results as time-resolved boundary condition
 
Hi,

I've had the idea of simulating a very small area with a really fine mesh and then take the results as input for a more coarse simulation in a larger area. But I don't simply want to define a start condition at the junction but to let them vary by time, just as calculated in the fine simulation before. I hope you get what I mean, I don't really know how to explain it in English. Is this possible and if so, how?

I really hope anyone can help me.

Robert

vainilreb November 19, 2012 01:55

Isn't there any possibility to do this?

In my case there is ammonia flowing into a room filled with air at high inlet velocities. Due to the high gradient in the gas concentrations at the inlet I have to keep the cell size extremely tiny. This makes the time step become extremely tiny. So I thought about calculating the process of gas inflow in a smaller control volume with very fine cells around the outlet and then use this control volume as inlet for a more coarse and faster calculation of the environmental setup.

Isn't this possible? :(


All times are GMT -4. The time now is 00:02.