technical problem
Hello; I have two problems: 1) For "heat transfer module" time-dependent : We consider a concrete slab : - The lower surface at T = 293.15 K set - The face higher flow q = 200W / m ^ 2 how to represent...
View Articletechnical problem
Hello; I have two problems: 1) For "heat transfer module" time-dependent : We consider a concrete slab : - The lower surface at T = 293.15 K set - The face higher flow q = 200W / m ^ 2 how to represent...
View ArticleProblem with Modeling a multi-stage agitated vessel
Hi all, I am having problem getting my model to run and converge. I am trying to model a six-stage agitated vessel in 2D. I have followed the steps described in the posted modeling of baffled mixer...
View ArticlePiezoelectric Devices with Electrical Circuit Help
Hello - Ive been using COMSOl for about 6 months, and working with Piezoelectric devices. I recently upgraded to the ACDC module to include SPICE models with my piezo component models. I would like to...
View ArticleVery simple semiconductor simulation
Hi! I'm trying to learn Comsol, but it seems have run into a wall. I've looked thoroughly through the semiconductor_diode model as well as the MOSFET model (in the showroom). However, as I implement...
View ArticleIteration solver, RF module, 4.2a
Dear Comsol Users, I have issue concerning iteration solver in RF Module, I want to follow during the simulations linear residual and linear error, because as you know, these values change for every...
View ArticleAC current in Helmholtz coil
Hi experts I want to solve the Helmholtz coils (following example) but use AC current.www.comsol.com/showroom/gallery/15/ I use frequence domain but face this error:"Failed to find a solution. Matrix...
View ArticleWrench example , deformation animation
Dears i am a new to comsol multiphysics software , i tried the wrench example , i want to see animation of wrench bending , i want to see the stress as it increase in the wrench what extra steps should...
View Articlei am getting 2015 error
dear sir, when i am extruding an accelerometer i am getting 2015 error how to solve it yours grk prasad assistant professor kl university
View ArticleCurrent/Charge conservation in AC/DC
Hello, My model has several layers of domains having different conductivity and permittivity. I want current to be conserved in each domain independently. At present, I choose current conservation node...
View ArticleHagen-Poiseuille Flow
I am having problems getting the same result when I try to model the Hagen poiseuille flow as when I calculate it. For more information on Hagen-Poiseuille...
View Article3d Core, Error: Unknown function or operator
Hello, I have modeled a 3d core with a coil and the coil I have declared Muti-turn coil. And in the simulation I have the following error: Unknown function or operator Name: mod1.mf.mtcd1.intp_edge...
View ArticleStructure with 2D and a 1D truss...
Hello all, I am trying to implement this (see attachment). I guess it should be relatively easy, and for sure lots of people know how to do it :). After "spending" quite a lot of time, I decide to...
View ArticleHeat Transfer in Soils
Hi, I am a comsol user and I want to have a 2d axisymmetric model. In my model, I have a soil sample that I put a steel bar in the soil. I want to heat the steel bar with a constant temperature 500(k)...
View Articletumor ablation model
hello, i am trying to make a model like" tumor ablation" model in comsol Heat Transfer Module but i want to change the current from DC to AC current and i want to plot the electric field distribution,...
View ArticleDeformation behavior of a liquid droplet impacting a solid surface -...
Hi, Can anyone give any idea of how to recreate the model of the given link?www.comsol.com/papers/8116/ please help.
View ArticleA simple problem on solving Poisson's equation
Dear all, I'm solving a Poisson's equation for a charged cylindrical shell structure. The model has cylinrical and z-invariant symmetries, i.e., only inhomogeniety in r direction exists. On the shell...
View Articlethermal magnetic motor and or generator
Along time ago I had the thought after reading and studying about patents by Edison and Tesla on the development of a thermal magnetic generator and/or motor Has anyone ever tried to follow through...
View ArticleFlooding with COMSOL
Hello, I want to simulate the inundation of the island due to water rise (as external parameter). Can I do it using COMSOL? If yes, Is It possible to combine it with the model of porous media? regards...
View ArticleSimple supported boundary condition in Comsol
Hi, guys. I'm actually studying cylindrical sound diffusers using Comsol 4.3a and I need to add simply supported boundary conditions. Is there any way to do it? I have noticed there's several...
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