function
Can anyone please help to write the above equation Y=X0*(1+sin*(w*t)) where w=2*pi*f (rad/s), t=argument(s) I have tried with analytical function after defining w in variables and all other constants...
View ArticleMicrochannel
I need to connect an external current source to the electrode used in my model using electric circuit interface.the electrodes are used in Primary current distribution in electro-chemistry module .is...
View ArticleERROR: nonlinear solver did not converge, when simulating ball movement in...
Hi all, I have seen several threads about this error and tried to figure it out myself using the sample cases but I still fail to simulate this. Any help will be greatly appreciated. I am trying to...
View ArticleHelp Needed: Extending Simulation of Magnetic Field (ID:2014) to a time...
Hello, I'm a new Comsol user and would like to ask a practical/technical question regarding one of your demos. The relevant model ID is 2014, Simulation of Magnetic Brake. I tried to extend the model...
View Articleextracting data from comsol to matlab through mphinterp
Hello, I have implemented the mphinterp function but when I want to extract results for different parameters something goes wrong. My typical comsolfiles look something like this: - In the Study...
View ArticleSimulation of a floor heating
Hi all, I want to simulate a floor heating in a 2D modell. Floor heating systems release about 90 % of heat in the form of radiation and about 10 % in the form of convection. So is it possible to take...
View ArticleHow I can add data for a solution to a new study?
I'm working on the simulation of an iron foundry, I made a transient thermal study, and I exported data solution in time 200seg temperatures. I would like to know how I can add the output exported to a...
View ArticleReading Deformation graph
I am getting a coloured graph for deformation in microgripper. Now I want to get the values of deformation at different point(x,y,z) (instead of graph) please let me know how to get that in comsol.
View ArticleData export using Matlab Livelink
I have designed a magnetic coil model in COMSOL and successfully imported it in MATLAB. I am plotting norm of magnetic flux in COMSOL Model. Now I want to extract the magnetic flux data in a MATLAB...
View ArticleCoupled electromagnetics-solid mechanics study
Hi, I'd like to couple an electromagnetical eigenmode study to a forced-response solid mechanics study. More specifically, I want to do the following: 1. Solve electromagnetics model for two eigenmodes...
View Articleinteraction valve-blood
Hi! i've to simulate the interaction between an aortic valve and the blood (i use comsol 3.4). I've a pipe with two leaflets fixed with a hinge. These are what i've imposed: incompressible navier...
View ArticleUnsteady Analysis
Hi, I am solving an Unsteady state problem, in which the time interval is very large, so it takes time to solve it. I interrupted the solution in between cause i saw the time step that i used to...
View ArticleDetect error with Matlab and go on calculation
Hi, I am running a parametric sweep of my model with Matlab. Sometimes the model doesn't converge, Comsol stops the parametric sweep and send an error message like "Last time step is not converged" ....
View ArticleComsol, Matlab and xmesh-error
Hey, I trie to run my Comsol simulation via Matlab because I want to loop some parameters. For test-reasons I try to run the tomograph tutorial as it solves quick. I'm using Comsol 3.5 but when...
View ArticleComsol issue on Linux
We had a simulation computing for about 3 weeks and paused it to quickly analyse some results. We created a graph and then Comsol stopped responding. It uses 100% of one of the CPU on our Linux...
View ArticleVariables
Hi everyone, I have a simple question for you. If I have a variable 'D' , coeficient difusion, depends to temperature (T) with the expression D(T)=0.29*T. the range of temperature is (900 kelvin to...
View Articleparameters
Hi everyone, I have a simple question for you. If I have a variable 'D' , coeficient difusion, depends to temperature (T) with the expression D(T)=0.29*T. the range of temperature is (900 kelvin to...
View ArticleEvaluating average value of variable along the length
I am solving free and porous media physics in the square domain (3D). I want to calculate average flow velocity through one of the four sides of the wall along the length. In 2D, I know that we can use...
View ArticleHelp...Which Iterative solver settings for 3D RF module with periodic...
Hi All, Can somebody help me with my solver settings confusion. I'm trying to setup a 3D RF module simulation with around 250.000 elements only with periodic boundary condition. I read that I should...
View ArticleNegative port impedance
Hi All, I am currently doing some antenna modeling. The antenna is excited by a 50 Ohm coaxial port. I get reasonable S11 results at resonance but the lumped port impedance is negative e.g. -5 Ohms....
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