Several BH curves for one part
Dear all, currently I'm working on a simulation approach for polymer-bonded permanent magnets. Therefore I need to implement several BH curves for one part. Based on the temperatur of every finite...
View ArticleHelp with Microcantilever displacement under load
Hey, You guys have been very helpful in the past, and I've tried to solve this on my own but I keep hitting an error and can't figure out why. I'm hoping you can offer some advice. I'm trying to find...
View Articleconvergence history
Hi All, I find that I cannot show the plot of convergence histroy after I re-open a convergenced case. How can I retrieve the convergence history? Thanks and regards.
View ArticleHeat Transfer in Solids (motion of objects inside a domain)
Hi, I am trying to model a simple 2D transient heat transfer problem. For this I move a sphere with a constant boundary temperature trough a plane making use of the Deformed Mesh and the Heat Transfer...
View ArticleSimulation of carbon atoms diffuse in amorphous media and collected at the...
Dear, I am beginner to use COMSOL software and I am not familiar with this software. However, you guys can help me out. I want to simulate a geometry of Nickel (300nm thick)/Silicon. Carbon atoms...
View ArticleSingularity error while solving an Induction machine
Hi, I am trying to model a Induction machine in COMSOL. What I have observed is that as soon as I provide any rotation to my rotor, I am not able to solve it. It gives me singularity error. However if...
View ArticleLorentz force calculation and implementation
I have got a clamped-clamped beam, with a DC current flowing through. If the beam is surrounded by a DC magnetic flux density (orthogonal to the direction of the current flow), a Lorentz Force arises...
View ArticleOptimization - Defeat reduction and control variable tolerance factors. What...
I'm currently working with the optimization module in COMSOL 5.2 on mac osx, using the built in parameter estimation step. I'm using the Levenberg-Marquardt solver with the numeric gradient method,...
View ArticleHow to make logscale colorbar
Hi all, Generally, a figure is with a linear colorbar after solving. I would like to show more obvious contrast on my case. So I think that my need is a logscale colorbar. Can someone tell me how to do...
View ArticleInitial and boundary conditions in heat and water flow model
Hi to all, I trying to solve transient heat convection and conduction model, coupled heat and water flow under the ground soils. The following messages has come during the solving: % Failed to find...
View ArticleConvergence plots
Does anyone know if it is possible to show a convergence plot during a livelink with Matlab? I'm using version 4.4 and matlab R2013a. Thanks
View ArticleOptimisation of processing parameters in laser sintering of metal/alloy powders
Hi everyone, I am new to COMSOL Multiphysics.. Can anyone help me in simulating selective laser melting(SLM)/direct metal laser sintering(DMLS) of metal/alloy powder media in layer-by-layer fashion? IN...
View ArticleError: Parameter lists gives empty sweep
Hello, I would like to know the reasoning behind this error in return of a monotonously incresing series of frequencies. Examples: a) 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 90,...
View ArticleIs there any possible way to use the results from a time dependent study in a...
Hello, I was wondering if I can use the concentration profile (from time dependent study with TDS module) as a boundary condition in a stationary study(AC/DC module). Thanks,
View ArticlePorous media modelling
Hi Whats the difference between porous media Transport properties and Transport properties in Transport of dilute species. Because I can implement in both cases the porous media, but the results are...
View ArticleCoupled heat and groundwater flow
Hi, I am modelling a permafrost problem, where a porous soil is saturated with groundwater and heated by surface temperature. I have used 'Heat transfer in porous media' coupled with the 'Darcy...
View ArticlePoisson-continuity coupled equation
Hello, I try to model the corona discharge in wire-cylinder geometry governed by the equations: nabla (V) =- rho/epsilon0 (Poisson equation) and grad (rho) * grad (V) = rho ^ 2/epsilon0 (equation of...
View ArticleVibrating Cantilever Beam in Air using the FSI Module
Hi, I am currently trying to simulate the airflow from a piezoelectric fan using the COMSOL FSI module (v4.2). I am doing this by modeling an oscillating cantilever beam in air, and running a time...
View ArticleWhat does optimality tolerance mean
In using the optimization module with MMA method, I want to know how the optimality tolerance is defined. From the manual, I know it defined as "The relative change is defined as the change in the...
View ArticleAdvice on heat transfer with fluid-structure interaction
I've been having trouble getting a certain problem to work properly. I'm trying to simulate heat transfer from a moving solid to a fluid, where the solid excites the fluid. The test file I created...
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