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Evaluating Volume in Livelink
Posted Dec 13, 2023, 9:56 a.m. EST LiveLink for MATLAB, Geometry, Mesh Version 6.0 2 Replies
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I came with the same question about evaluating the volume of my geometry in Livelink,
One can evaluate the volume right after running the model (not before) using
model.result.numerical.create('meas1', 'MeasureVolume'); model.result.numerical('meas1').selection.all; %or other selection depending on your problem model.result.numerical('meas1').setResult; current_volume = model.result.numerical("meas1").getReal
Otherwise, if one wants to evaluate to evaluate the volume before running the model, consider for instance that you want to create a geometry with a desired volume within a loop (see for instance https://www.comsol.com/blogs/how-to-create-a-randomized-geometry-using-model-methods/), the previous method is not practical. I have done this via the mesh node.
current_volume = mphmeshstats(model,'mesh1').volume
If one have several meshes then, one has to sum up them all.
Is there other solution, perhaps at the geometry node?
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You can measure the volume of a domain WHILE you run the model by integrating 1 in that domain of interest in a nonlocal coupling. This can be done directly in COMSOL. I guess there is an option to do it over the Livelink, but I am not using that.
Cheers Edgar
-------------------Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
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You also don't need to solve or (resolve) any physics. You can "get initial values" (or "update solution") instead to compute (or recompute) a quantity that is not impacted by the solution of the physics.
Jeff
-------------------Jeff Hiller