How to use previous solution as a initial condition in time dependent PDE...
I want to run parametric sweep on a time dependent PDE problem. During each parameter I want to set previous solution as a initial condition. I did it as attached. But in that case I have to manually...
View ArticleRemoving thermal insulation
I am new to Comsol I am trying to simulate a time dependent spark plasma sintering process using the Joules heating and thermal expansion in structural mechanics multi-physics module. I have a problem...
View ArticleModelling a basic coil in COMSOL Multiphysics using the AC/DC module
Madam/Sir, I'm new to this software. I've went through the introduction videos posted in the website itself. I went through one of the blog written by Walter Frei which said about designing a single...
View ArticleDifferent results are strange with same definitions but different physics
Dear all,I am simulating a pm_motor that I defined the magnets with Ampere Law. I used the same value of remenant flux density. When I reached the result, the result in magnetic field is normal but in...
View ArticleSimulation analysis of liquid placed in a container
For example, place water in a metal tray, how can i to simulate? What the model of fluid I need? I'm a beginner, please help me. Thank you very much.
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Unexpected behaviour of "intop" function
Hi all!First of all I'd like to thank this forum, here I have found many answers I needed before. But now I couldn't find any at all.Thing is, I have a quite complicated 2D model of a superconducting...
View ArticleHeat Transfer - Liquid/Air
Hi,the problem is, I have a hermetic area, which is filled with water and air. The water should have a higher initial value than the air, whereupon a heat transfer takes place from water to air. To...
View Article2D Plasma Simulation with Air Cooling on Dielectric/Coil Region - Error With...
Hi,I have not seen any tutorials or blogs of my particular problem so I'm at a loss of what to do. Here is what I expect to simulate:I have an ICP plasma at 20 mTorr discharging a standard plasma of ~...
View ArticleSimulation does not converge
Hello,I am simulating a basic model in electromagnetic frequrency domain physics. The material which i am using has three values electrical conductivity, relative permmitivity, relative permeability,...
View ArticleVolume force simulation in laminar flow multi physics in COMSOL 5.3
Hello, I would like to understand how to simulate a volume force (in my case I am trying to simulate electrotheral body force) in a microfluidic channel using laminar flow multi physics. I would...
View ArticleComsol doesn't generate a result for every node
I'm using version 5.3a, I've built a uniform rectangluar geomerty, with a uniform mesh but the results are not shown for all the domain (I exported surface results into excel, but didn't get equal x...
View ArticleHigh aspect ratio geometries: Internal Error in Geometry decomposition
Hi,I need to create a geometry in which there are several small cylinders that intersecate other bigger (~50 times bigger in size) objects, usually blocks. For example, some operations involve the...
View ArticleQuestion about capacity calculation in two spheres example.
There is great example in Comsol blog: "How to Calculate a Capacitance Matrix in COMSOL Multiphysics" (https://www.comsol.com/blogs/how-to-calculate-a-capacitance-matrix-in-comsol-multiphysics/).All...
View ArticleHow the execution of additional Segregated Study steps in the Time-dependent...
In COMSOL Multiphysics 5.4, I had run two simulations using the Time-dependent Study. In them, the Iterative solver was used. According to the Complete Reports that were written from these simulations,...
View ArticleHigh-frequency background magnetic field
Hello,I built a 2D multi-layer structure. When high-frequency magnetic field goes through this structure, I want to consider the attenuation of this field so that I can get different magnetic field...
View ArticleWhat should I do to make the program equally understand the separator "dot"...
I wrote a simple application with one input field. If I enter in the input box 1.0 (through dot) everything works. If I enter 1,0 (through comma), it gives an error (Syntax error in expression). Is it...
View ArticleFinding The Electron Transport Properties As A Function Of Reduced Electric...
Hi,I wanna find the transport properties of electrons as a function of reduced electric fields;As Plasma User's Guid suggestion , I have used Plasma Madule>>Boltzman Equation, Two-Terms...
View ArticleComputation with Time dependent Study doesnt end?
Hi, I am trying to do time dependent study with Electrowetting droplet on COMSOL. My problem is after doing all the settings, the simulations goes on and on and never ends. What can be the possible...
View ArticleHow to obtain the dynamic stiffness and damping for a hydrodynamic journal...
I am trying to model a hydrodynamic journal bearing using COMSOL and I can get the static performance of the bearing, but I don't know how to obtain the dynamic performance of this bearing in terms of...
View ArticleHow to simulate a mesh tube acting as a porous fliter?
Hi, I am currently try to simulate a chemical reaction reactor. The figure is attached. The gas flow into the reactor through a tube. This gas tube permit the gas flow inside the reactant region, the...
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