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 ArticleMEMS:Microgripper
I have considered a default model in comsol , a microgripper and tried to improve it. As i modified the geometry and simulated it, an error occurred the simulation is complete but the opening never...
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 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 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 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 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 ArticleMaxwell Surface Stress Tensor
Hi all, I'm trying to calculate the magnetic attraction force between two objects in COMSOL 4.3a, by using Maxwell Stress Tensor. I found four possible Maxwell functions to calculate the force: Maxwell...
View ArticleBoundary conditions in the tutorial model (Periodic boundary conditions)
Hi all, I have question regarding the boundary conditions used in the tutorial model about periodic boundary conditions. In this model a plane wave with a wave-vector with non-zero x- and z-component...
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...
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