Heat Transfer in a bitumen tanker
I am trying to model a steel tanker filled with molten bitumen. The tanker is insulated and the bitumen is heated by two propane burners ( in form of U) located at the bottom. For the bitumen I have...
View ArticleInitially Stressed Bimorph Beam - Electrostatic Actuation
Dear All, I am attempting to model a bimorph which naturally deflects upwards due to stress in the lower layer of the beam. So far, this part has been successful. The top of the bimorph is silicon, and...
View ArticleTutorial: Working between COMSOL 4.1 and MATLAB 2010b
Ok, here is what I figured out in order to be able to take a COMSOL model, modify it in MATLAB and then reopen it in COMSOL for further work: 1. Launch COMSOL normally; 2. Launch MATLAB by using...
View Articlehelp internal parser error
Hi, it appears an error that says "internal parser error" when I write " 0.01[Pa·s] " in Global Definitions->Parameters. It has something to do with the viscosity units. Could anyone help me? Thanks...
View Articlemoving projectile-railgun
Hi The following linkwww.comsol.com/stories/cote_railgun/full/ describes a model with a moving domain. Does anyone have the paper or model file or maybe knows some detail, which modules were used, in...
View ArticleDefining MIXTURE of gases
hi friends i want to define a mixture of gases (iodine,xe,radon) at inlet each with different concentration for diffusion in the air . how can define mixture with different conc in comsol .
View ArticleImported SolidWorks part doesn't behave correctly
I'm relatively new to COMSOL but I haven't had much luck finding a solution. I had an assembly in SolidWorks made of 3 parts. I created a new SolidWorks part file which had the 3 parts mated together...
View ArticleEuler-Euler Model: reached singularity
I am running a Euler-Euler model and get a singularity error about six seconds into a 12 second analysis. It appears that there is a high velocity flair at an inlet when the singularity occurs. I have...
View Articleharmonic perturbation
I have a question about harmonic perturbation I assigned a 1 A current to a cylinder in mf physics using multi-turn coil and solved it with a 60Hz frequency using frequency domain. If I assign 0.1 A to...
View ArticleForced Vibration of Vertical Simply Supported Beam with 'Overhang'
Hi, I'm trying to simulate the forced vibration of a beam that stands vertical and is supported by two simple supports that are shaken back and forth by a motor as in the attached schematic. I've also...
View ArticleVibrating horizontal plate.
Good Evening everyone, I have a really simple question, I'm sure someone knows the answer to my problem. I'm trying to make a model of a plate, platform, anything you want to call it, that vibrates...
View ArticleSolving Time dependent problem with stationary solver at the same time.
Hi, I am trying to simulate a brushless DC motor. I want to make comsol to solve the problem in the form of time dependent. However, during each time step, comsol should solve and obtain a stationary...
View ArticleCalling all electrochemical enthusiasts - March courses on Electrodeposition...
Join us this March for our special courses focused solely on electrochemical applications. First, we will be offering our popular Electrodeposition course where we will cover electrode kinetics, the...
View Articlethe electric potential dependent on temperature
hello, please help me i am trying to make a model of an electrode in a cylinder of biological tissue, i want to make the electric potential on the electrode dependent on the temperature of the tissue,...
View ArticleError: The file position must be a positive integer
Hello, I am going through the SAR in human head example provided. Everything is completed as per the tutorial. I am trying to solve now. However, I get this error: ==================================...
View ArticleHow to export data in excel format?
Hey Ivar, I want to export my figure into excel format. and replot it in matlab. Is it possible ? Thank you very much!! Baofeng
View ArticleAccessing the outlet value to apply in the inlet boundary
Hi. I need to set up the inlet boundary condition (temperature) in the conjugate heat transfer analysis with larminar flow. However T of inlet (fluid) should be like this: Tin = Tout + 3 K (at every...
View Articleelectrostatic force cause displacement in parallel plate capacitor in COMSOL
Hi, I have been designed a parallel-plate capacitor in COMSOL. Where one plate is connect to voltage of 10V and other one is connected to GND. and a air box is around the parallel plate capacitor. As I...
View Articlestreamline problem
Hey, i am having some problems creating the steamlines for my Helmholtz coil. I followed the steps for the one of the model on comsol website for Helmholtz coil except other than revolve to create the...
View ArticleProblems related to relative tolerance and relative error
Hello I want to reproduce a model in which there are two spheres in contact one upon the other along the z axis, and then i has applied two forces, one on the top (point or boundary region of the...
View Article