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Exporting data files after parametric sweep with varying mesh size
Posted Apr 27, 2020, 8:22 a.m. EDT Mesh, Results & Visualization Version 5.4 1 Reply
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[start here] Hi, I'm doing a parametric sweep on some of my model's geometry parameters. I would like to export the data for each parameter combination into an independent .txt file for post-processing. I followed the instructions in the above discussion, but I get the following error:
"Data can only be exported if the same mesh is used for all parameter value"
Is there any way to do this? If I run the sweep and then save the results for each solution manually it works fine, but this is very tedious when I need to run many combinations...
Thank, Ori
Hello Ori Golani
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DEAR PEOPLE FROM THE FUTURE: Here's what we figured out so far: You can force comsol to output data on a fixed grid using the cut point data set (I used 1D, but there are also 2D and 3D). I wanted to extract the parametric solution along a cross section of the structure. What I did is: 1. Define a line cut 2D, with the propertities of the cross section area 2. Set the line cut's dataset to the parametric solution 3. Define a cut point 1D, Set its dataset to be the cut line 4. Set its coordinates manualy to a range along the cut line. Note that the coordinaes are defined relative to the line, not the global geometry, i.e the point x=0 corresponds to the start point of the line. 5. export the data with an export data node, pointing to the cut point dataset.
The result of this is a single file with all datapoints along the cross section and all parameters in the sweep. It is a bit annoying to parse this file, but better than doing it file-by-file...