how 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...
View ArticleHow to calculate the rotational speed of pm-motor
Dear allI am Joey.I am simulating a permanent magnetic motor with rmm physics. I need the torque, the rotational speed of rotor, should I define a parameters before calculating? Also, if you know more...
View Articlemagnetic field due to thin solenoid
Hi. I'm completely novice in comsol, and I'm trying to simulate magnetic field due to solenoid.I was wondering how can we simulate "n turn per unit length [m]" in comsol.Here, I want to have a solenoid...
View ArticleFrequency response analysis of a damped piezoelectric resonator
I've been having a problem doing frequency response analysis for a quartz tuning fork. I was able to obtain a decent frequency response without any damping and it kinda forces the response to be a very...
View ArticleHow to evalute stress on gauss point with MATLAB?
The below post is related to an archived discussion[start here] Difference B/W Von Mises Stress And Von Mises Stress Gauss Point Evaluation.Does any one know what is the difference between simple von...
View ArticleThe model - An immersed cantilever beam
I am interested in this model's details (designing and simulation), so if any could help me with any attachmet files for the same.
View ArticleSimulation of MOSFET model.
I want to simulate Mosfet using 2D plot . Can anyone suggest some tutorial or help me understanding the MOSFET simulation
View ArticleChanging phase field model in comsol
Hello everybody,I want to change the phase field equation in the comsol and I don’t know how I can do it.In the attachment, you can find all information about my problem.Thank you for your help in...
View ArticleDrawing a triangular hole in a cuboid
How can I draw a triangular hole in a rectangular channel? I am currently creating a 2D workplane and after drawing the required geometry in 2D, I am using the difference option. But the triangular...
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