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E-field enhancement

Hi, I read "Near-fields in Arrays of Triangular Particles: Coupling Effects and Fields Enhancements", I added this file. In this article, I am very interesting "using COMSOL part" because I exactly...

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Non - Isothermal Flow (nitf)

Sir, I have assigned materials to the domain elements that are required. And, in the step of inspecting the physics part after assigning materials, it is again asking for domain selection. What does...

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Using saved solution Comsol v4.1

hi, I want to use the saved solution for the initialization of the second one. for example I solve my problem with a given boundary condition and I want to increase the boundary value for the next...

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convert imported *.stl into solid

I am importing a rather complex geometry into COMSOL from Solid Works. After some tinkering with the import controls, I managed to import the object but I do not think COMSOL recognizes it as a solid....

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Face Cannot Be parameterized

Hi all; I try to import a STL file to Comsol 4.3a but this error appeared "Face Cannot be parameterized"? Any help? Thanks in advance :)

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Straw Poll: Who would like to see the model gallery documentation overhauled???

Hello all, I thought I'd post this here to get the community opinions before suggesting it to support. If I want to learn how to use an aspect of Comsol I work through example models and I visit the...

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Using step function in kinetic reaction simulation

Hi I am trying to simulate the kinetic reaction of biomolecule interaction in fludic channel expecting to have association and dissociation phase (concentration of complex versus time) in the same...

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Electrostatics and Electric Circuit

I am relatively new to COMSOL. I am trying to simulate a two part problem. 1. An electric pole is placed underwater 2. A circuit is built around it to measure the voltage drop across a resistor The...

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Meshing Internal Volume of CAD import

All, I am trying to model fluid flow inside of a CAD object. How do I create a domain inside the object that I can mesh? I have capped all the openings. Thanks, John

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Convergence issues in time dependent moving mesh simulation

Hi all, I'm simulating the evaporation of a sessile droplet (2D-axisymmetric model). The droplet is very hydrophilic and has a very small contact angle (picture attached). The coupled physics are: 1....

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calculating scattering and absorption cross section of gold nanosphere in...

Hello, I'm working on Comsol4.3a these days, and this is my first time using this software. Actually, I started with building the " Optical Scattering Off of a Gold Nanosphere" model, as it is...

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Integration Coupling Variables

I am trying to find the volume of a spherical shell using Comsol 4.3a in a 2D axisymmetric coordinate system. I attempted to do this by creating a integration coupling variable along the boundary of...

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Problem with meshing

Sir, While meshing my model, I am getting an error message as follows "Out of memory for mesh processing". What does that error mean and what are the correction requirements??

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RAM requirement

What is the probable RAM requirement for mesh processing??

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Please send me tutorial for ultrasonic wave propogation through liquid

I need tutorial on Ultrasonic wave propogation through liquid.

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Eigenfrequency and Temperature in a Cantilever

Hello, I'm using COMSOL for some months. I'm simulating the eigenfrequency of a clamped-free beam (cantilever MEMS). The value of the eigenfrequency at room temperautre is correct (about 6.4MHz) but...

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Dubinin Sorption Model on Dual Porosity System

Hope this message finds you all well. I have a little technical question. I am currently trying to build a dual porosity model using the earth science module of comsol multiphysics 3.5a. However, I...

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Questions of the modelling of a light bulb using Heat Transfer Module

Dear all: Now I am trying to carry out some simulations using heat transfer module. To start with, I downloaded the "free convection in a light bulb" model, which can be obtained from:...

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import a bmp image into COMSOL geometry

Hey, as stated in this webpage: www.comsol.com/products/formats/ Comsol can both read and write few types of images. However, when I tried to import a bmp image as my structure for flow simulation, it...

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Coupled magnetic and solid-mechanics simulation

I have a question about coupling a magnetic study to a solid mechanics study. I attach to this email a simple model to explain my question. In the model you can find a permanent magnet with a round...

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