Store solution as variables for next simulation
Hello all,I'm working on the volume expansion problem that requires the concentration profile in a 3D geometry. Now I have solved the concentration profile (time-dependent). My question is, how can I...
View ArticleMeaning of error message
HiPlease could you help me with the interpretation of this error message attached here. And possibly the way out. Thanks.
View ArticlePressure, Temperature, and Material Deformation Coupling
Hi,I'm very new to COMSOL and can't seem to figure out how to solve this problem or find any tutorials for it. I essentially have a sealed hollow metal box (filled with air) with a thin wall on the top...
View ArticleCross section result analysis of 3D geometry
Dear all, I want result in cross section view of the 3D structure. How could I get the cross section analysis of 3D geometric structure?
View Article"Error when unpacking resources. Error code: -1"
Hello,I get an error when trying to start the comsol version 5.4. The message I get is "Error when unpacking resources. Error code: -1", and the software doesn't start.Did this already happen to...
View ArticleHow to add interaction forces between particles and walls
Hi everyoneI want to try to simulate a particle absorber (requires box vibration to drive internal ball vibration, through ball-to-ball interaction and ball-wall interaction to achieve vibration...
View Articleaverage of parametric sweep solutions.
Hi all,I'm simulating the effect on heating uniformity of a sample by moving a stirrer within a microwave reactor.The stirrer position is given by a parameter related to its rotation angle, and I want...
View ArticleSolar Radiation Transmittivity
Hello Experts,Is it possible to model transmittivity of solar radiation through a semi transparent materials (e.g. glass). I note that using the External Radiation Source one can model solar heat flux...
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Randomise theta and phi angles of column geometry?
Hi. I plan to design a model geometry composed of an array of simple columns (or simply vector lines, whichever is simpler) where each column has a randomized tilt.Questions:Is there a log/immediate...
View ArticleDefine Number of Mesh Elements
Is there a way to define the number of elements explicitly?I.e., if I want the mesh to have 200 elements to build it as such?
View ArticleA PN junction reversal problem
The model I created is to add a P-type region at the top of the uniformly distributed N-type region, apply voltage to the bottom boundary, the top boundary voltage is 0, and the steady-state solver...
View ArticleFailed to find a Solution during tDCS simulations
Dear AllI am working on Transcranial direct current stimulation modelling. Where model is generated from isotropic MRI data acquisition using simpleware and imported into COMSOL 5.0. The material...
View Articlehow to call the displacement of a point in matlab function
HiI want to add a load by implementing such a function whose dependent variable is the displacement of a point(or the cross section of a beam) at a certain coordinate position. It is a time-dependent...
View ArticleCannot find consistent initial value, the last step does not converge
In my case,Individual modules are fine, but together they can cause problems.I'm looking for a solution.Thank you for your help
View ArticleSet Variable according to momentary Value
Hi everybody,I want to create a Variable in COMSOL that will be set to 0 or 1 depending on the momentary results. I am using the Bioheat Package. What I want to achieve is the variable being set to 1...
View ArticleExporting Domain Geometry
Hi everyone,I am new to COMSOL and am looking at modelling heat transfer for a liquid cooled heat sink.I have a model of a cold plate with two domains (one for material and one for fluid) which was...
View ArticlePhase change material. How to see the latent behaviour in the Temperature curve
Hi everyone,I'm triyng to simulate a box with PCM inside, inserted in a laminar flow of hot water. Basically the aim of the simulation is: the water enter cold from the bottom, and when it reaches the...
View ArticleMagnets force of attraction
Hi,How to find the force of attraction between two cylindrical magnets separated by air distance. magnets are N42(dia 10mmx3mm) and N52(dia 10mmx3mm). let the air distance vary from 2mm to 10mm. Is...
View ArticleThermal Stress and Heat transfer in an Assembly. Contact boundaries don't...
Dear All,I wonder wether or not someone can help me with a simple problem. At least that is what I assume.I am working on thermal stress in a cooled mold and wonder about the heat transfer when the...
View ArticleHow can I plot elastic deformation versus time in multibody dynamics module?
Now I use comsol's multibody dynamics module to analyze a rotate beam. The beam is flexible and hinged at left end and rotate with respect to the left end point . As the beam is flexible, the elastic...
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