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How to get temperature output of a 2D surface

Hi, I am working on a 2D heat transfer model which is time dependent. Heat transfer is occurred by conduction and radiation. For getting the temperature output at the interface I use the 1D plot group...

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Work on COMSOL through MATLAB?

Hi, I would like to run COMSOL through MATLAB but don't understand how? For example when I have saved a COMSOL simulation as M-file and tries to open it in MATLAB it won't open and I am not sure how to...

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Recoverable error in residual, but solver could not recover.

Recoverable error in residual, but solver could not recover. What is the meaning of this error ?

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Induction Heating 3-D simulation in COMSOL 4.2

Hello, I'm trying to simulate the Induction Heating in 3-D simulation. Could you please tell me the components of Induction Heating (such as: Sufface Current, Ampere's Law, External Sufface Current...

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larger ICP model causing problems - singularity error

Hey, I am using your thermal_plasma model as a basis to my model. It is almost the same. The only difference is that in my model the tube is straight (not curved) and longer (0.8 m). These are the...

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Can I use COMSOL to solve integral equations?

Dear all, I have some integral equation to solve. Can I do that with COMSOL or I always need to change it to PDE? Thanks a lot!

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Fluid flow with a moving solid object/hole

Hello, I would like to model the airflow in a room occupied with people, and to allow the people (cylinders) to move around in the room. Is this possible in COMSOL? For a silly example in 2D: I have a...

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what type of physic that i should use?

as-salam and good evening.. my name is azman and I really need your help.. I got an assignment which is need me to calculate electric field when applying 5kHz high frequency 10.0kV to the electrode. i...

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Warning: Parametric solver does not support geometry and mesh dependent...

Dear all, I want to sweep a parameter, but the geometry and mesh depend on the parameter. Then I get the warning message Parametric solver does not support geometry and mesh dependent parameters. I...

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Reflection/transmission spectra of a free standing Ag film with periodic hole...

Hi, I want to use COMSOL 4.3a to simulate the reflection and transmission spectra of a free standing Ag film with periodic hole arrays. There is an error " Failed to find a solution for the initial...

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Anisotropic Magnetoresistance

Hi! I need to simulate an AMR sensor, which is a magnetometer, whose working principle is based on the Anisotropic Magnetoresistance. The sensor is made of a thin strip of permalloy, a ferromagnetic...

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Definition of a flux

Hello everyone, I've a little problem with the definition of my flux, in fact I used the rectangle function to make my flux periodic but after the computing, when I draw my flux (flux in function of...

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Thermal energy problem

Hi, In the attached 3D model model I am investigating fundamental thermodynamic physics (usually I do that to understand/check how COMSOL handles the physics before I gonna apply it to my complicated...

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Solving a 3rd order polynomial

Good day, When using the Distributed Algebraic Equation physics, is there a way to solve a higher order polynomial for a variable and be able to acquire all of its roots/solutions simultaneously and be...

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Contact problem. Static vs Dynamic

I have an impact model; steel presses down soft tissue. I can solve this model in static analysis with prescribed displacement. But when I solved the model in dynamic analysis with prescribed velocity,...

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membranes coupled with air

I am trying to model the coupled modes of a musical drum with two heads. I need a membrane under tension at either end of a cylindrical shell of air. I can do it with solid shells at either end of the...

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Does processor's clock speed matter for best computation in COMSOL?

Hello all, I am planning to buy a new computer with processor Intel Xeon E5-2620 and Server Motherboard Intel S2600CP2. I want to achieve best computational performance in COMSOL, and knowledge base...

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local coordinates and material anisotropy

Hi, I am trying to build a 3D heat transfer model of a machine stator coil. As the bulk material is anisotropic i would like to keep the anisotropy consistent around the bends of the coil. This would...

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Change boundary conditions during a transient solution

Hello, in an acousitc transient simulation, I would like to change a boundary condition during the simulation. I would to impose on this boundary: 1. a pressure condition during the 100 first time...

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How to assign a 2D random function as porous matrix property (porosity)

Good morning, I really need your help, because I can't find anything in the help files. I have a model using the the Brinkman Equations module for 2 dimensional porous media flow. I want the porosity...

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