Re: Mesh element volume
Hello ALE is certainly a good approach, particularly if you have larger deformations. I cannot confirm your formula, bacause I havent to now used it myself, but from the help I beleive you are right. I...
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Hi, In Comsol 4.1, is there a way to display or export the volume of each single mesh element (I am not speaking about the volume of a domain). I can display the size, h, but what about the volume of...
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Hi, Alois You can probably utilize the deformation gradient tensor to calculate the volume of each mesh element. For the large deformation, the determinant of the tensor give you the ratio of deformed...
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Hi Wonsoek, thanks for your suggestion. I do not have any mechanical deformation, since my problem uses the "Electric Currents" physics. I am just interested in the volume represented by each single...
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Hi, Yes I got the solution from Comsol support. Here is a summary of this support case: My email #1: I would like to ask you if there is a way to obtain the volume of a mesh element in Comsol 4.1. I...
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Hi from my understanding "dvol" is a mesh element scale factor (without units), not truly the volume of the element. ----------- Good luck Ivar
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Hi, when multypling dvol with the corresponding correction factor (Triangle : 1/2; Tetrahedron : 1/6; Prism : 1/2; Pyramid : 1/3) and summing up the result over an entire domain (using the evaluation...
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Hi then I'm not sure how to use it within the GUI as the "summation over a domain" is over the nodes and not the elements from my understanding (integration of 1 = volume, summation is a number >...
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Hi, I did not use it in the GUI, but I extracted the data (using Gauss evaluation of order 1) and then computed the summation in MATLAB. It might not work in the GUI, Alois
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Hi Indeed it needs some further investigations ;) -- Good luck Ivar
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Please help : I need to know the mesh element size in the 'extremely coarse' mesh and may also need to know the element sizes in the other mesh types such as 'normal', 'fine' etc. Is there any way I...
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Hi In V4 by default its Si units hence [m], except if you change the base unit system of your model (top node). You can change the default geoemtry units from [m] to [mm] or whatever, this remains...
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Hi, I amtrying to find the volume of a geometry, or rather, the part of it where S < 0. So I figured that I could define an integration operator that integrates over the desired domain (this part...
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Hi in comsol when you integrate the dx*dy*dz is implicit, and controlled by COMSOL so there is no reason to use twice dvol, its implicit there, if you want the volume of a domain, you integrate over...
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what kind of data or information do you extract from comsol and further process in matlab? There are just x- and y-coordinates, element size for the mesh element. How do you figure out the element...
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I extracted two quantities: - dvol (for a set of coordinates x,y z) - meshtype (for a set of coordinates x,y,z) To obtain the volume of a mesh element (in Matlab), I multiply "dvol" at coordinate...
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Just wanted to say Thanks for the solution Alois! Struggled a bit with this, while trying to find the magnetic energy of nonlinear steel by integrating over the saturation in matlab. My 2 cents: The...
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thanks. I have the exact same in mind, in python though ;) For the comsol guys; I do not understand why it is so difficult to combine the current output of some package as an input for the magnetic...
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... for some unknown reason there is no mesh-type node in my export table?! workaround: if I do ... Results>3dplotGroup>mesh DataSet: Mesh I can see, with for example Volume, the Element-Type....
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