[Enternald]

Hi all,

I am wondering if there is a way that I can apply fixedGradient (or something similar) at some later point in the simulation. For example, I want to run the simulation for a set amount of time (e.g. 50 seconds), then at that time activate the gradient. I am using chtMultiRegionFoam. Does anyone know of a way that I can do that?

[dlahaye]

1/ run case with settings (a) from t = 0 to t = t_{intermediate}

2/ change from settings (a) to setting (b) and set startTime in system/controlDict to latestTime

3/ run case with settings (b) from t = t_{intermediate} to t = t_{end}

[CFD-HSNR]

Originally Posted by Enternald

Hi all,

I am wondering if there is a way that I can apply fixedGradient (or something similar) at some later point in the simulation. For example, I want to run the simulation for a set amount of time (e.g. 50 seconds), then at that time activate the gradient. I am using chtMultiRegionFoam. Does anyone know of a way that I can do that?

Hello Enternald,

If you want to change your boundary conditions for your field sizes to be solved for particular parts of your mesh at certain points of the simulation you can also do this with the changeDictionaryDict.

To do this, simply stop the simulation via the controlDict at the desired point in time, enter the desired changes in the changeDictionaryDict and then run the application. Afterwards you can restart the simulation from this point with the changed boundary conditions.