error- boundary flux
Hello all,I receive message as shown below after simulation"Computation of accurate boundary fluxes failed. Accurate flux will not be available for postprocessing."What are the reason for this ? How...
View Articleelectric field and electric potential for clean glass insulator
Hello there,I am trying to simulate the electric field and electric potential for clean glass insulator inergized with 18.5 kV AC 50 HzHere is the result I got. can anyone please validate these result...
View Articlespecifying cross section moment of area for truss buckling
I am teaching a course in finite element analysis in a mechanical engineering department. It is mostly theoretical, but I am using COMSOL for lab exercises. We are starting with truss analysis, not...
View ArticleDiffusion Combustion
Good Evening, my name is Hezron from Indonesia. I want to ask how to simulate the diffusion combustion using the concentric jet flow nozzle, Thank You
View Article2D to 3D vessel
Please tell me, if it is possible/optimal in Comsol 5.5 to convert 2D into 3D in the form of a tube with different diameters that are equal to the cross section of the 2D model. Tools like Loft and...
View Articlepermanent magnet(cylinder magnet)
Hi, I'm trying to create a cylindrical neodymium magnet.Why does the magnetic field value from the permanent magnet change each time the size is changed in the air domain?For example, increasing the...
View ArticleJava runtime error occured when I computing model and COMSOL was shut down.
I am using COMSOL Multiphysics 4.3b.There was no problem when I compute model with respect to 'heat transfer solid' only.But when I compute model with respect to 'heat transfer solid' and 'solid...
View ArticleHow to deal with geometry overlapping
Hello, I have a geometry model which is continuously transposed cable, so all the strands are tranposed connected, first I draw rectangular and a polygon to define its spine, then I use sweep to model...
View ArticleBoundary conditions for porous media in dam break case !
I have a dam break simulation created on comsol as seen in the following video https://youtu.be/02tGVX0PRGoThis dam break is simulated using (Two phase flow - laminar - phase field) Now I want to place...
View ArticleSimple thermistor example
Hello,I am trying to test an example of using a bisection method in matlab with COMSOL. I've attached a paper that I'm following.I need to 1) get a simple thermisor Comsol programme 2) run the...
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Post processing visualization takes a lot of time than the study solution...
I did a 2D Axisymmetric pressure acoustics frequency domain analysis.The solution had completed less than a minute.I wanted to visualize the sound pressure leve on a cut plane from the 3D dataset (made...
View ArticleMagneto-elastic modes in magnetic nano-structures after pulse laser excitation.
Dear all Group members, I have moved to comsol for one of my problems which require multiphyics but I have no idea where to start as I am a novice to this Software. Probem description is below: I...
View ArticleSurface reaction
Hello, I'm simulating this case: a channel in which an exothermic reaction takes place on the surfaces. I'm using " surface reaction " and trasport of diluted species for the mass transfer. I'm new in...
View ArticleComsol crashes only when computing "solid mechanics"
I have a problem using COMSOL Multiphysics.When I computing a "heat transfer in solid " model, there is no problem.However, if I computing a "solid mechanics" model, the COMSOL crashes and "hs_err"...
View ArticleFinding the mode shapes at the outlet
Hello,I am currently modelling a rectangular duct with the acoustics module. I am feeding various modeshapes e.g (1,0) (1,1) etc in the inlet via the port functionality and would ideally like to find...
View ArticleOverhead Power Lines
Hello everyone,I have the next problem that I do not know how to solve, I have a cable made of steel and aluminum wires and I would like to observe the heat distribution of this cable if it is traveled...
View ArticleHow to do a parameter sweep of a 2D axisymmetric resonator with EWFD and...
Hello,I have a 2d axisymmetric model that is just a rectangular ring resonator waveguide.I would like to do a paremeter sweep over waveguide geometry and get the effective index of the TE00 or TM00...
View ArticleHow to do a parameter sweep of a 2D axisymmetric resonator with EWFD and...
Hello,I have a 2d axisymmetric model that is just a rectangular ring resonator waveguide.I would like to do a paremeter sweep over waveguide geometry and get the effective index of the TE00 or TM00...
View ArticleCluster computing on two desktop computers running Windows 10
Hi, I have been runing some large-model simulations and would like to utilise serval computers I have in my office, however we don't have a cluster server. I have Comsol installed on every computer. I...
View ArticleChemical reaction
HelloHow to model a reaction where solid converts into another solid and liquid using reaction engineering physics? Reaction engineering thermodynamic system wizard contains only liquid and gas but no...
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