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potentialFoam - How to set velocity field

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Old   April 18, 2020, 07:30
Default potentialFoam - How to set velocity field
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dear, all

I am currently investigating a particel flow (Solver: DPMFoam).
To speed up the simulation I would like to calculate a potential flow first. Like it is done in the Motorbike Tutorial.

In the DPMFOAM simulation the velocity field is called U.air. Is there a way that I "tell" potentialFoam that the velocity field is called U.air.

Or can I calculate potentialFoam with U and then map from U to U.air (with mapFields)

Here the (obvious) error message from potentialFoam:

Code:
potentialFlow: Operating solver in PISO mode

Reading velocity field U

[0] 
[0] 
[0] --> FOAM FATAL IO ERROR: 
[0] cannot find file
[0] 
[0] file: /*****************************************/processor0/0/U at line 0.
[0] 
[0]     From function regIOobject::readStream()
[0]     in file db/regIOobject/regIOobjectRead.C at line 73.
[0] 
FOAM parallel run exiting
Regards
Marcel
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Old   April 18, 2020, 08:10
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Troy Snyder
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Quote:
Originally Posted by mab2351 View Post
dear, all

I am currently investigating a particel flow (Solver: DPMFoam).
To speed up the simulation I would like to calculate a potential flow first. Like it is done in the Motorbike Tutorial.

In the DPMFOAM simulation the velocity field is called U.air. Is there a way that I "tell" potentialFoam that the velocity field is called U.air.

Or can I calculate potentialFoam with U and then map from U to U.air (with mapFields)

Here the (obvious) error message from potentialFoam:

Code:
potentialFlow: Operating solver in PISO mode

Reading velocity field U

[0] 
[0] 
[0] --> FOAM FATAL IO ERROR: 
[0] cannot find file
[0] 
[0] file: /*****************************************/processor0/0/U at line 0.
[0] 
[0]     From function regIOobject::readStream()
[0]     in file db/regIOobject/regIOobjectRead.C at line 73.
[0] 
FOAM parallel run exiting
Regards
Marcel
I think you may be able simple to run potential foam and then rename the resulting U file to U.air. The mapFields utility is generally reserved for mapping from once case to another, like mapping from a coarse mesh to a fine mesh, or vice versa. With "source" and "target" arguments, the mapFields utility does not provide an option to rename a specific file containing a field, e.g. U.
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