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Questions overset interpolation with DyM very slow for large 3D cases |
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November 29, 2017, 13:40 |
Questions overset interpolation with DyM very slow for large 3D cases
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#1 |
Senior Member
Join Date: Jan 2014
Posts: 179
Rep Power: 12 |
Hi guys,
At the moment I am playing around with the new overset feature of OF 1706+. Everything is fine so far, I observed just for large 3D cases and moving mesh cabalities (for example a flapping 3D airfoil) a huge decrease in speed up (overPimpleDyMFoam). This is due to the cutting hole algorithm of the overset analysis itself. There are three kinds of interpolations possible: inverseDistance trackingInverseDistance cellVolumWeight. So which one would you recommend in order to speed up the cutting hole algorithm. Mesh is changing here every time. At the moment I am using inverseDistance approach by defining a searchBox with subsequent Divisions. Thanks in advance, |
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December 29, 2017, 06:25 |
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#2 |
Senior Member
Yann
Join Date: Apr 2012
Location: France
Posts: 1,062
Rep Power: 26 |
I'm working with overPimpleDyMFoam on a moving object in 3D meshes and I tried the 3 algorithms on the same case.
On my case, inverseDistance and trackingInverseDistance have pretty much the same speed, while cellVolumeWeight is way much longer (about 5 times longer than inverseDistance) Those tests have been done only on one case so I'm not sure this results is valid as a general rule. Furthermore, I used the default setup for the 3 algorithms. For inverseDistance, I've seen it's possible to specify 3 parameters : layerRelax, searchBox and searchBoxDivisions. How do you use the searchBox feature and did you notice a speed up with your setup compared to the default setup? |
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September 4, 2022, 04:53 |
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#3 |
Senior Member
Michael Alletto
Join Date: Jun 2018
Location: Bremen
Posts: 615
Rep Power: 15 |
Hello, I added a small explanation why I think the cellVolumeWeight interpolation method is much slower compared to others. See https://openfoamwiki.net/index.php/O..._volume_weight
Maybe it is useful for someone |
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