[Vallum123]

Hello!
This is my first time here, so please correct me, if I do something wrong ;-)
I am also quite new to simulating with Fluent.


I want to simulate a Combustion in a rather long chamber (2D). I want to run a simulation for the whole chamber. Then I want to cut off the chamber at a specific length.
Now I want to use the values of pressure and temperature at the cut as boundary conditions for a new simulation of the smaller remaining part of the chamber to reduce calculation time.
Do you guys get what I want? Feel free to ask.



Is that possible and how?


Thanks in advance!

[LuckyTran]

For this to work well, you should have it meshed such that there already is a a cut-plane in the grid and you can do 1-to-1 mapping from the cut solution onto your new case without any interpolation. But with interpolation it is still doable.

If the cut-plane doesn't exist then make one. Create the surface in Fluent just as you would when you want to plot anything.

Then extract a PROFILE using this surface of all the needed variables. In boundary conditions go to Profiles..., choose Write..., and Define New Profiles. This writes a text file with all the variables you select.

Then in your new case, go to Boundary Conditions, Profiles..., and read this PROFILE into your new solution. Now when you go to each of your boundaries, you can choose the profile. In the dropdown bar where you normally see constant and New Input Parameter... you will now also be able to choose the profile.


Note that there are also Profiles for cell zones (volumetric ones), do not use this one. Use the one in boundary conditions.

[Vallum123]

Thanks a lot!