heat penetration in microwave oven domain through waveguide
The below post is related to an archived discussion[start here]sir, As I am done with modelling for basic model (heating of water), i came across two problem 1. the study part showing no output as...
View Articlesolid mechanics weird results
Hi,I am simulating a piezoelectric device. I am experiencing difficulty in understanding the stress result of the structure. The bottom layer has zero displacement boundary condition, however I see a...
View Articledisplay the graph for a specific volume
Hello,I made the mechanical simulation for a large volume (eg. 0<X<760, 0<Y<760, and 0<Z<80). But I want to general a 3D graph to show the mechanical deformation (strain) for a...
View ArticleLaser cavitation
Hello ereryone, I am leaning the COMSOL to simulate laser cavitation, unfortunatly, I can not simulate the expansion and collase of bubble. Anyone have the related experience of bubble simulation?Or...
View ArticleInternal error callback
Hi therewhen I run same case 5 times, maybe 3 times of them failed the error was** internal error callback**. It seems that COMSOL is unstable. It's not always worked or failed.Any help will be...
View ArticleSolid-beam weld joint
I screwed up the Comsol versioning on my previous post so I want to ask my question again, in proper context. I use Comsol 5.2a, I have a simple need to weld one end of a beam to a rigid domain. All I...
View ArticleHow to draw an arc with fixed radius and across two points in MATLAB livelink...
Hi,I am using matlab livelink to draw a geometry. Does anyone know if there any commad to draw an arc with a specific radius and across two points?Thanks!
View ArticleOpening/Accessing methods saved in the MPH file outside of the Application...
Hi, we created an App from MPH file under Windows (Application Builder is only available in Windows). This MPH file was then slightly edited under Linux, but the functionality of the App should not be...
View Articlehow to know the meaning of phrase like ewfd.nxx or ewfd.kixx used as part of...
Hi， I find many phrases like ewfd.nxx and ewfd.kixx were used as part of expression for variables and it is hard to konw what these mean.Is there any files to search or anyway to know ? Thanks.
View ArticleHexagon spiralled channel
Hi,I need to model a hexagon spiralled channel in a similar fashion of a circular one, which is taught here: https://www.comsol.com/blogs/how-to-build-a-parameterized-archimedean-spiral-geometry/Would...
View ArticleProblem in the creeping flow model: does not work in one case but works in a...
Hi, I'm having a problem with comsol : I do not know if it come from a ill-posed physic or if it's a "numerical problem". Indeed, I use the creeping flow model on a rectangle with an inlet (p = 1) to...
View ArticleBalanced and Unbalanced Signals
Hello,I would like to study on baluns by using COMSOL. I need to convert between a balanced signal and an unbalanced signal. I had assumed that the coaxial lumped port is unbalanced. But after I did...
View ArticlePeriodic Boundary condition in a multiphysics.
Hello everyone,I am new to COMSOL, and I was in a confusion about the boundary conditions applied to the multiphysics. I am working on a piezoelectric model and want to apply periodic BC to the model....
View ArticleHow to extract the stiffness matrix and mass matrix of the element in comsol
How to extract the stiffness matrix and mass matrix of the element in comsol， I know that the code mphmatrix can extract the global stiffness matrix ，global mass matrix and so on. Yet i want to extract...
View ArticleHeat profile used in different model
Hello, I am pretty new at comsol, I have simulated joule heating physics and achived heat profile across my design. Now I wish to simulate stress induced by heat in the same model. The problem with...
View Articlewhy partial derivative of the hydrostatic pressure field equals to 0?
Excuse me, I solved the two-dimensional hydrostatic pressure field solid.p. The hydrostatic pressure solid.p distribution is not uniform. Use d(solid.p, x) to solve the partial derivative of solid.p...
View ArticleHow to download the software--comsol multiphysics?
Hello,can you help me to find the way about downloading it?I can't find corresponding download link.I want to study it in some experiments as a college student.Thank you.
View ArticleSurface plot of velocity in Comsol for a 2D flow case
If I want to plot surface velocity profile in Comsol such that we have a plane on horizontal surface and variation of velocity is shown in vertical direction as if it appears to be a truncation, how to...
View ArticleImplementation of Preisach Hysteresis Model
Hi, I have implemented the model of a common mode choke for electrical drives, now I have to calculate the magnetic losses of the ferromagnetic core. In order to do this and to make the hysteresis...
View ArticleImplement function in Type field
Hi,i have a question about my problem. It is a Iron block with an hole (borehole). On the inside of the borehole i want to heat the block with the "boundary heat source --> heat rate" function. It...
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