Starting a simulation from a non-zero time with changed boundary conditions

J_here · June 25, 2018, 08:13

Dear Foamers,

I have base case simulation and want to start a new simulation from the base's steady state but with a section of wall changed to an inlet with a certain strength.

I have searched through the old posts and can find how to change a wall to a patch but not to an inlet.

Any help or guidance will be much appreciated

akidess · June 25, 2018, 08:35

It's super simple:
Open the U file in the directory of the appropriate time instance, and change 'noSlip'/'fixedValue' to whatever boundary conditon you desire. Make sure the simulation is set to start from 'latestTime' in the controlDict.

J_here · June 25, 2018, 10:11

Quote:

Originally Posted by akidess

It's super simple:
Open the U file in the directory of the appropriate time instance, and change 'noSlip'/'fixedValue' to whatever boundary conditon you desire. Make sure the simulation is set to start from 'latestTime' in the controlDict.

You know I had never scrolled all the way to the bottom of the U file, I just assumed it was all cell info !

Many, many thanks!

June 25, 2018, 08:13	Starting a simulation from a non-zero time with changed boundary conditions	#1
J_here New Member Jonty Pedersen Join Date: Jun 2018 Posts: 8 Rep Power: 7	Dear Foamers, I have base case simulation and want to start a new simulation from the base's steady state but with a section of wall changed to an inlet with a certain strength. I have searched through the old posts and can find how to change a wall to a patch but not to an inlet. Any help or guidance will be much appreciated

June 25, 2018, 08:35		#2
akidess Senior Member Anton Kidess Join Date: May 2009 Location: Germany Posts: 1,377 Rep Power: 29	It's super simple: Open the U file in the directory of the appropriate time instance, and change 'noSlip'/'fixedValue' to whatever boundary conditon you desire. Make sure the simulation is set to start from 'latestTime' in the controlDict. J_here likes this. __________________ On twitter @akidTwit Spend as much time formulating your questions as you expect people to spend on their answer.

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