Connecting two physics
The below post is related to an archived discussion[start here]hi, i want to add the capictor from electrical circuit to the electron beam simulation in particle tracing module to check wether it is...
View ArticleBoolean geometry operation failed
Hello, I am having a problem opening my Solidworks CAD model in COMSOL. I imported the CAD model into COMSOL but it displayed error "boolean geometry operation failed". Any assistance to rectify this...
View ArticleAdaptive mesh refinement error indicator
I am using the general form PDE option from the mathematics package to solve some equation and I would like to use adaptive meshing. The default error indicator is sqrt(comp1.u5x^2+comp1.u5y^2) (my...
View ArticlePoint evaluation from Parametric sweep
The below post is related to an archived discussionThe above discussion is about 7 years old. Has it been fixed yet?Regards, Gayathri
View ArticleAcoustic Radiation Force
Hey! I am currently using Comsol Version 5.2 and am stuck in an acoustics module simulation.How do I specify the force parameters, that an acoustic wave exerts? The force is 2(alpha)I/c, where alpha is...
View ArticleElectric displacement field in ISFET tutorial
Dear Community,I am trying to go through the ISFET tutorial, when setting up the electrostatics for electrolyte, the tutorial says that I should specify D0 vector in the boundary electric displacement...
View ArticleHeat transfer across two metal contact
I would like to simulate heat transfer across a junction built of copper and aluminum. Could you help me how to define the physics?
View ArticleCapability to store and retrieve data at each iteration
Hello, I need to be able to store the solution at each iterative step. Does anyone know how to make this happen?The data at each step can be reviewed to determine mesh issues or other issues without...
View ArticleError? Please help me
Undefined value found. - Detail: Undefined value found in the equation residual vector. There are 2 degrees of freedom giving NaN/Inf in the vector for the variable comp1.ewfd.S1x.
View ArticleCOMSOL model into microcontroller
Can we execute the comsol model into c language or any microcontroller platform. This COMSOL model can be used parameter estimation in MATLAB.
View ArticleHow can I find capacitance of cylindrical coaxial capacitor
I have cylindical coaxial capacitor in between the electrodes i have a small metallic ball whose position i have to vary so that i can determine the capacitance varitaion due to changer in size and...
View ArticleProblem: RF Heating - Microstrip Patch Antenna
Hello,I am trying to run a brief simulation of a microstrip patch antenna to check the RF Heating generated. I have imported my design from CST, update the materials and I have followed the steps for...
View ArticleConjugate heat transfer
Sir,I have a geometry consisting of a solid cylidrical tube pierced by a number of pipes through which fluid is flowing. I would like to analyse the heat transfer between the pipes and the solid....
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Simulation of interdigital electrode structures (Electrostatics)
Hello everyone,I am a student at the university of bremen and for my master thesis I have to simulate certain electrode strutures. While I think that I have built a good simulation it doesn't show the...
View ArticleHow to insert electric field as variable in a formula
Hi,I an using coefficient form PDE and some of the equations i am using are directly related to the electric field (i.e. variable of electric field) I would like to know how to insert variable electric...
View ArticleCFD Facade Element_Error: Division by zero. - Function: /
Hi,I am trying to run a CFD simulation to check the heat transfer by convection inside a cavity with blinds of a facade element. I got the following error:Division by zero. - Function: / Failed to...
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How to change the color of the graph of particle trajectories (i.e. velocity...
Hello, everyone, I am in the middle of some color setting when I use comsol for particle tracing, I hope to change the default red-blue color scheme(similar to that shown in the link) in to grey scale,...
View ArticleTwo boundary conditions at any boundary
Dear all, I want to impose pressure and velocity boundary conditions at any boundary in a pipe flow problem. Is that possible? Thanks in advance for your response.
View ArticleThe coefficient of variation (CoV) v5.3
Hello, I need help with a project I'm working on. I have a static mixer and I would like to evaluate its mixing quality. In order to visualize what is happening inside the mixer I had used Transport of...
View ArticleAbout the COMSOL version of ISFET tutorial
Dear Community,I am trying to simulate an ISFET and I started from the tutorial. Because I only have the access to the 5.2a of the Chemical Reaction Engineering Module so I use 5.2a COMSOL and...
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