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Re: Mesh element volume

hello I'm not sure I really catch fully your request, but to calculate the volume, surface, length you simply apply a "Integration Coupling Variable" on a Subdomain, Boundary, respectively Edge, you...

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Re: Mesh element volume

I appreciate your reply. I noticed that ALE module can allow us to calculate the volume ratio of deformed and undeformed mesh. The variable (dvol_ale/dvol) seems to give me the ratio for individual...

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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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Re: Mesh element volume

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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Re: Mesh element volume

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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Re: Mesh element volume

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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Re: Mesh element volume

I am also interested in this problem. Did you find a solution?

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Re: Mesh element volume

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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Re: Mesh element volume

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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Re: Mesh element volume

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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Re: Mesh element volume

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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Re: Mesh element volume

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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Re: Mesh element volume

Hi Indeed it needs some further investigations ;) -- Good luck Ivar

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Re: Mesh element volume

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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Re: Mesh element volume

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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Re: Mesh element volume

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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Re: Mesh element volume

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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Re: Mesh element volume

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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Re: Mesh element volume

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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Re: Mesh element volume

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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