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Will the increase of the relative tolerance reduce the solving time ?

Dear all, as mentioned in the title, I would know if the change (specifically an increase) of the relative tolerance in Time Dependent solver (but also in Stationary solver, why not) will reduce the...

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Force Due to Electric Field

I am trying to obtain the force due to electric field. If someone can help me' that'll be great Here is my case - electrostatic module - Upper Surface of the airfoil has two copper electrodes (one on...

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About tutorial of light scattering on gold sphere

Hi all, I just started learning comsol with a tutorial provided by comsol.com. In the example, it solves light scattering problem on a gold sphere. I'm curious if I can pull out magnetic field for a...

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error " Reached end of data when reading"

Hi, I faced a very strange error related to my COMSOL files. The problem is, when I save a comsol file, I cannot open it again. The message error is “Reached end of data when reading”. I’m sure that...

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Assigning velocity as a boundary condition

Hi I am modeling an electrophoretic phenomena where the governing equations are - Navier Stokes equati - Poisson equation - Nernst Plank equation This is an axisymmetric model containing a half circle...

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How to couple Soil Plasticity with Subsurface Flow Module?

Dear All: I am a beginner of using COMSOL for soil mechanics study. Recently, I am trying to study the influence of subsurface flow process on soil deformation. I use Richards Equation to get the pore...

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Heat Transfer after Deformation (Contact Pair)

Hi, i am trying to model heat transfer between two concentric cylinders where inner one is heated. The inner cylinder is pressurized and eventually touches the outer one. For modeling structural...

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Define an arbitrary EM wave

Hello I am new in Comsol and i have a problem : i want to calculate SAR for SAM phantom for different types of EM waves. but the source of EM waves ( signal generator ) isn't important. is there any...

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Simple Magnetoresistance Model

Hi, my apologies in advance for what is probably a trivial question - I am new to Comsol. I am attempting to create a simple model of magnetoresistance. I have defined a permanent magnet in the MFNC...

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Opening COMSOL 3.5a files in COMSOL 4.3b

How can I open COMSOL 3.5a files in COMSOL 4.3b?

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Setting convergence condition in fluid simulations

Dear Sir/Madam I'm a novice in COMSOL use. I have a question regarding convergence in fluid flow simulations. I know that in FLUENT one has the possibility to set the divergence of velocity field to a...

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Chemical Engineering Module using mechanistic scheme computed by Matlab

Dear all, I'm totally beginner on Comsol and i need some help. I've already solved a mechanistic scheme on Matlab which solves the evolution of the average molar mass of a polymeric material depending...

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what is value of "relative permittivity" for gold (au) and aluminum (al) ???

any buddy help me to tell what value should make appropriate result in actuator of relative permittivity - au ____?? relative permittivity - al ____??

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Set geometry/boundaries using a variable?

Hello, I am trying to solve the device physics equations for a 1D (eventually 2-3D) solar cell with the PDE solver. However, a solar cell of fixed total thickness and two physical layers typically has...

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Data import from one simulation in comsol to another

Hi, I checked the heat transfer in solids for my structure and now I need to use this heated up condition as an initial condition to cool down the device and see how long it will take, (time dependent...

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MMI waveguide design...using PML

Hi, I'm new to COMSOL, attended one of the workshops and have been going thru the tutorials. I'm trying to design a slab waveguide...with a core refractive index of 3.48...cladding of 1.54....about...

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Axisymmetric Hertzian Contact mechanics model

Hi, I am trying to model a sphere pushing on a surface. To do so, I have created a 2D axisymmetric model with a point load close to the apex of the half-circle; as putting a point load right at the...

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2D simulation with floating electrode

I am fairly new to COMSOL and was wondering of anyone knows how to correctly define a floating electrode in a 2D simulation? I have some strange results from my simulation. I have two concentric...

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flload not working

Hi everyone, i'm new to comsol and I have a problem with COMSOL-with-MATLAB. I have the 4.2a release and matlab 2011b. I need to use a .mph file in matlab and my colleague suggested me to use the...

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energy storage model (joule unit)

Hello sir I have a simple 2D model which has energy storage in the middle of model. I want to see how temperature profile changes with time. To simulate my model, I need to 1000J(joule) in storage...

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