CFD Online Discussion Forums - acousticDampingSource

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acousticDampingSource

Hello,

1. does anybody know how selectionMode with cellZone work?

with this fvOptions there is always same error message:

[0] --> FOAM FATAL ERROR:
[0] Cannot find cellZone selectedCells
Valid cellZones are 0()

2. or are there another selectionMode, except of "all;"?
-> I saw a tutorial used selectionMode all; but I think it does not make any sense, cuz all of cells are damped.
https://develop.openfoam.com/Develop...stem/fvOptions

3. what does duration 1000; mean?

Code:

acousticDampingSource

{

    type                acousticDampingSource;

    active              yes;

        

    timeStart           0.15001;

    duration            1000.0;

    selectionMode       cellZone;

    cellZone            selectedCells;

    centre              (0 0.04 0);

    radius1             2.0;

    radius2             4.0;

    frequency           3000; //1e+07;

    //w                     3;

    URef                UMean;

}

1. you need to create a cellZone first by using topoSet.

2. options are, afaik: all, cellZone, cellSet (at the moment, you need to specify `selectionMode all` if you wanna use `all` mode, as `selectionMode` is a mandatory entry - but may be in the future, it can become an optional entry, don't know).

3. duration = until what time you want function object being executed. e.g. if your simulation endTime=100, and duration=50, the execution of this FO will cease after 50, but your simulation will keep going.