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Problem with Sampling plane

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Old   December 14, 2011, 13:48
Default Problem with Sampling plane
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Hi,
I observe that for a given plane, mass flow through that plane calculated using massFlow function is different (sometimes very sigificantly) if the plane is of Slice or of Sample type. I have taken care to have same location and bounds for the plane in both the types.

Still massflow for a Slice type of plane is correct as per my simulation and the same for Sample type is wrong.

The reason I why I want to use Sample plane is because I want to calculate mass flow through planar, non-overlapping stripes of equal size made normal to flow direction so as to have mass flow distribution along coordinate normal to flow direction. Refer attached figure which shows the stripes along coordinate y while the flow is along x-direction. Now the massflow calculated through these stripes is wrong because it does not addup to the total mass flow over the entire y extent at that location.
I cannot use Slice plane to make these stripes it does not result in stripes of equal y sizes as my mesh is non-uniform in y-direction.
How can I solve this problem ?
Thanks for your inputs
Attached Images
File Type: jpg massflow.jpg (31.7 KB, 85 views)
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