Changing inlet BC

Carno · August 29, 2016, 02:11

Hi All,

I want to change the inlet BC (from 20 m/s to 50 m/s) and use the previous results. Everything else is exactly the same, i.e. mesh, BC types etc.
I know the results of 20 m/s case should be mapped on the new case.

Code:

mapFields <source path> -consistent -sourceTime latesttime

It has been 1.5 hrs it is doing it on 5.5 million cells. Is there any simple and faster way to change the inlet BC on the same mesh?

Thanks

Traction · August 29, 2016, 02:25

You can modify the U-file in your latest time directory (change the inlet velocity) and adapt your controlDict (startFrom latestTime). Don´t forget to choose an appropriate endTime in your controlDict.
By doing so you are able to resume the simulation with a different inlet velocity.

Carno · August 29, 2016, 02:32

Thanks.. I will give you a try..

August 29, 2016, 02:11	Changing inlet BC	#1
Carno Member carno Join Date: Mar 2009 Posts: 70 Rep Power: 17	Hi All, I want to change the inlet BC (from 20 m/s to 50 m/s) and use the previous results. Everything else is exactly the same, i.e. mesh, BC types etc. I know the results of 20 m/s case should be mapped on the new case. Code: mapFields <source path> -consistent -sourceTime latesttime It has been 1.5 hrs it is doing it on 5.5 million cells. Is there any simple and faster way to change the inlet BC on the same mesh? Thanks

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August 29, 2016, 02:25		#2
Traction Member Join Date: Mar 2014 Posts: 39 Rep Power: 12	You can modify the U-file in your latest time directory (change the inlet velocity) and adapt your controlDict (startFrom latestTime). Don´t forget to choose an appropriate endTime in your controlDict. By doing so you are able to resume the simulation with a different inlet velocity.

August 29, 2016, 02:32		#3
Carno Member carno Join Date: Mar 2009 Posts: 70 Rep Power: 17	Thanks.. I will give you a try..