Modeling Anisotropically Expanding Domain
Hi,I am attempting to model a 2D reaction-diffusion system in which the overall domain size increases as a function of local concentration. I've done this using a deforming mesh and prescribed mesh...
View ArticleHow to use a cylindrical coordinate in solution？
I want to extract the rotaion angle of the model from the results, but I don’t know how to use the cylindrical coordinate system in post-processing. Help me please. In addition, I want to know why the...
View Article*Friday, August 14th* Abstract Submission Deadline for COMSOL Conference 2020...
Hello COMSOL Community!The final abstract submission deadline for the COMSOL Conference 2020 North America is coming up on Friday, August 14.By presenting at the COMSOL Conference, you can:Get...
View ArticleSaving accumulated probe table at time steps taken by solver?
I am doing a parametric sweep on my studies and am interested in the results recorded by a few probes. When running without the sweep, I select to update probe results at the times taken by the solver;...
View ArticleCircular coil
The below post is related to an archived discussion[sHitart here] Hi! I'm trying to model a circular coil with a toroidal geometry. I want to see the magnetic flux density but I don't know how can I...
View ArticleRising air bubble in turbulent water environment (multiphase)
I'm consistently running into the "No convergence, even when using the minimum damping factor" error. I want to model a multiphase system with an air bubble rising in turbulent water. The system is...
View Article3D-shell
Recently, I want to use comsol shell module to simulate the deformation of Kirchhoff thin plate and Mindlin plate. How should I set up the software to distinguish these two types of research?
View ArticleCluster sweep for a time-dependent study
Hi,I have a time-dependent study that I'm trying to make parametric sensitivity analysis for it using a remote high-performance cluster.To speed up the process and distribute the job to many nodes, I'm...
View Articlefirst Eigenmode not found
Hi everyone, I have problem in evaluating the eigenfrequency of a sinmple cantilever (one side fixed). I suppose to have problem in building a good mesh, the beam is composed of different layer with...
View ArticleDiluted material transfer in fracture, d operators are not defined properly...
Hello,everyone! Coulud anyone help me with this problem? Comosl is used to calculate the coupling problem of solid mechanical field and material transfer field. When no cracks were added in the...
View ArticleTwo step stationary study, problem of using the result of 1st step as the...
For this kind of initial value problem, there are lots of discussion over it. However, I still fail to figure out the way to do it.Here is my simple test, I created one study including two stationary...
View ArticleSimulating the acoustic radiation force on a small particle in a viscoelastic...
HiI want to simulate the acoustic radiation force on a small spherical particle in a viscoelastic fluid by comsol multiphysics. I want to know, can I use the equations in this...
View ArticleExtruding Circles
Dear COMOSL community,I am new to COMSOL and am looking to extrude this design to make it 3-D but I feel I am struggeling more than i should be. The goal is to end up with a solid disc with many...
View ArticleDraw elliptical cylinder
Hello,I am having problems drawing an elliptical cyllinder.What is the equations for workplane?Best.
View ArticleIntro to Simulating Optoelectronic Devices with COMSOL Multiphysics®
please can anyone share this .mph file discussed in this event https://www.comsol.com/video/intro-to-simulating-optoelectronic-devices-with-comsol-multiphysics-sep-19-2018
View ArticleWhat is the meaning of the variable of *ht.DeltaH*?
When I studied the application* Concentric tube heat exchanger(Application Library path: Heat_Transfer_Module/Applications/concentric_tube_heat_exchanger, version: 5.4), I found a variable *ht.DeltaH...
View ArticleFinding the amount of change
I want to plot the "changes" of a domain variable (say temperature) between two different times in a transient simulation. for example the value of T(t=20)-T(t=10) in the whole domain. is there any way...
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Adding 'for loop' and threshold limit
Hello Professionals!!!I'm an intermediate user of comsol and need some hints and suggestions out of your experiences.I have to perform heat transfer simulations. The emperature of one cell (primary...
View ArticleZero Determinant of stiffness matrix
Hello,I am trying to evaluate the conditioning of the stiffness matrix. My simulations work fine and seem to give good results. However, when I extract the stiffness matrix into Matlab using an...
View ArticleMax/Min Volume Plot and Legend limits of Volume Plot
Hi, I am solving an electrothermal problem by incorporating the Electric currents(ec) and Heat transfer in solids(ht) Physics interfaces and the electromagnetic heating multiphysics coupling.I have...
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