[swak4Foam] weighted average over a subset of a planar slice?

pbachant · March 14, 2016, 09:30

I have a case setup to use swak4Foam to compute some weighted averages over a slice of my domain, but I would really not like to use the entire cross-section, since my experiments don't reach that far. Right now I'm using something like this with funkyDoCalc:

Code:

planeAverageAdvectionZ
{
    type swakExpression;
    outputControlMode timeStep;
    outputInterval 1;
    valueType surface;
    surfaceName testPlane;
    surface {
        type plane;
        basePoint (1.0 0.0 0.0);
        normalVector (1 0 0);
        interpolate true;
    };
    verbose true;
    expression "-UMean.z/UMean.x*gradUMeanX.z";
    accumulations (weightedAverage);
}

But I would like to change testPlane to only extend, e.g., from (1 -1.5 0) to (1 1.5 0.625) min/max points, with the same normalVector. Is there an appropriate syntax to do this, or do I need to create a cellSet or something and only compute within that?

silvan · March 21, 2016, 03:29

dear pete,

thanks for posting your issue. it is an interesting task, and I tried to achieve something similar in the past with topoSet. my post is here: http://www.cfd-online.com/Forums/ope...tml#post552881
unfortunately, I couldn't motivate any expert on this topic to answer my question...
let us know, in case you found the solution to this task.

regards,
silvan

March 14, 2016, 09:30	weighted average over a subset of a planar slice?	#1
pbachant Senior Member Pete Bachant Join Date: Jun 2012 Location: Boston, MA Posts: 173 Rep Power: 13	I have a case setup to use swak4Foam to compute some weighted averages over a slice of my domain, but I would really not like to use the entire cross-section, since my experiments don't reach that far. Right now I'm using something like this with funkyDoCalc: Code: planeAverageAdvectionZ { type swakExpression; outputControlMode timeStep; outputInterval 1; valueType surface; surfaceName testPlane; surface { type plane; basePoint (1.0 0.0 0.0); normalVector (1 0 0); interpolate true; }; verbose true; expression "-UMean.z/UMean.x*gradUMeanX.z"; accumulations (weightedAverage); } But I would like to change testPlane to only extend, e.g., from (1 -1.5 0) to (1 1.5 0.625) min/max points, with the same normalVector. Is there an appropriate syntax to do this, or do I need to create a cellSet or something and only compute within that? __________________ Home \| Twitter \| GitHub

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March 21, 2016, 03:29		#2
silvan New Member Silvan Join Date: Jun 2014 Posts: 12 Rep Power: 11	dear pete, thanks for posting your issue. it is an interesting task, and I tried to achieve something similar in the past with topoSet. my post is here: http://www.cfd-online.com/Forums/ope...tml#post552881 unfortunately, I couldn't motivate any expert on this topic to answer my question... let us know, in case you found the solution to this task. regards, silvan