[nialloneill]

Hello,

I am using OFv10 for a turbine simulation. I have a question about how I could go about running a sliding mesh simulation, from the results of a MRF simulation, just to skip over the initial transient part. Initially I tried to just copy the last time file over and start from the "latestTime" in the controlDict, but this gave me an issue.

Then I realized that the boundary condition for velocity would change from "fixedValue" to "movingWallVelocity" on the blade. My question is, how would I change this boundary condition before starting the sliding mesh simulation?

The only place that i can see boundary condition definitions is in the 0 time file, but If I re-start from 1000 (for example, if my MRF case converged within 1000 iterations), would openFOAM even recognize a change in the "0" file?

I suppose essentially this is just confusion about how the actual boundary conditions themselves are initialized. I find it hard to get a good explanation of this online.

Thanks

[tomf]

Hi,

For these kind of operations I would suggest to look into changeDictionary.

There are some tutorials that use this. Basically it allows you to change any dictionary within a file. It uses a changeDictionaryDict where you can specify what change you want to occur.

Use

find $FOAM_TUTORIALS -iname *changeDictionaryDict*

to find some examples.

Then copy one of those changeDictionaryDicts to your case folder, adapt as necessary and run:

changeDictionary -time 1000

This can also run in parallel.

Regards,
Tom