Difference between laser heating and microwave heating
Hi, I got a question about the heat transfer module in comsol. The version I used is 5.3a.There is a electromagnetic heating branch under the heat transfer module, which contains two sub-branchs: laser...
View ArticleHeat transfer in solid and Phase change material
The below post is related to an archived discussion[start here]I developed a time-dependent model for a model that has phase change material. Please see the attached file. The Boundary conditions that...
View Articlehole on block
how can I make two holes on left and right side of block? please I need a detailed explanation. Thanks
View ArticleComsol solver friezes and doesn't use RAM
I am running Comsol 5.5, on win 7, 64 bit, with 32 GB of RAM, Solving a simple thermal stress problem. It was fine around 2 months ago, but now when I run that very same model, the answers aren't...
View ArticleError: invalid ELF header - Trying to call a Matlab function from COMSOL
Steps to get the error:From Ubuntu, I do start COMSOL as:comsol -mlroot /usr/local/MATLAB/R2019b -forcegccWithin COMSOL, under the "Global definitions" node, Functions = "/home/miguel/Desktop/PCE...
View ArticleErrors：Undefined value found Linsolv, NaN or Inf found when solving linear...
Respect Sir or Madam， I have built a 3Dmodel of two-phase flow, But when I was doing transient calculations, the report had a warning: Failed to sample error estimate, use initial value estimate, and...
View ArticleThe Eigenfrequency Study in a FE-BE model
Hi, I am a beginner in COMSOL Multiphysics and use it for the vibroacoustic modelling. In my model, I use the FEM to model the structure and the BEM to model the external air domain. I got an issue...
View ArticleNatural convection in an enclosure
I am facing trouble in convergence for natural convection problem in a square enclosure for rayleigh number (Ra=10^6), for all other rayleigh number( Ra=10^3, 10^4,10^5) the solution is converging but...
View Articlebox model
how can I model a box empty inside? can I do that by let the material of the block is air? kaindly help
View ArticleCalculation of microwave-heated potatoes
Microwave-heated potatoes are calculated using an electromagnetic wave heating module. Frequency-domain calculations and transient calculations are used to study electromagnetic waves and solid...
View ArticleDecompose Shear ( transverse) and Pressure ( Longitudinal) Waves
Hello everyone I have a model which produces elastic waves, from laser heating. Now I need to identify the displacements originated from shear and pressure waves, to focus on shear wave only. currently...
View ArticleRelaxation of a solid geometry with initial displacement to fundamental...
For a given solid structure (Cantilever beam) with size: length=8mm width=4mm and thickness=0.1mm, I want to investigate the transient behaviour for a given initial displacement. The initial...
View ArticleUndefined variable. - Variable: mf.normB (Magnetic and structural field...
Hi, everybody,I have a multiple physical field (magnetic field and structural field) coupling model to be solved.The magnetic field has been solved already. Then I want to use the mf.normB solved in...
View ArticleIntegrating different COMSOL modules
Hello,I'm trying to simulate my physical setup for my master's thesis in COMSOL. It involves the creation of a magnetic field through applying a current to a copper-made solenoid. The magnetic field...
View ArticleCPU Maxing Out
Hi all,I am brand new to COMSOL and just started using the program about 1 week ago, and I am noticing that when running the COMSOL multiphysics solver that my CPU is nearly maxing out (90%+ usage). I...
View ArticleWrong stress distribution
I'm modeling ice flow using a user defined creep strain rate tensor. I'm getting close to the expected velocities but the stresses are much too high and have an odd distribution that I think indicates...
View ArticleSimulating pipe flow
Hello ,I am trying to simulate fluid flow and couple to species transport in a pipe section of diameter(d) ~5 micrometers and it branched into two pipes of d/2 and merger to form a pipe of dia, d...
View ArticleMoment at the edge of the structure
Hello,I am doing some FSI simulation for a structure that contains mostly circular beams (wind structure reaction). My question is, how can I need find the moments at the constrained edges of the...
View Articlepiezoelectric fan simulation
Hello, I am working on a piezoelectric fan simulation to study the effect of the fans placement on the air output. I just started learning how to use COMSOL and I can't find much help on how to study a...
View Articlethe fatal error during installation
Hello,when I installed COMSOL in my laptop, some errors appeared.----begin fatal error (1)------ 12:13:16 vcredist_vc141_x64.exe excited with exit code 23 ----end fatal error (1)------How to solve this...
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