2D electrostatic Force
Hi, I am modeling a slice of a simple comb capacitor in 2D. I would like to determine the force acting on the fingers. I can calculate the electric field, but when I try to determine the force through...
View ArticleMultiple concentration step function
Hi, Have a great day. I am a new user of comsol 3.5 version, currently, I am working with chronoamperometry and I am trying to simulate that one using comsol by multiple concentration step functions....
View ArticleMaxwell Stress Tensor
Hello all, I'm new to Comsol and Im having a little difficulty getting my head around how the Maxwell Stress Tensor operates. I understand its operation when applied to parallel wires (Like in the...
View ArticleOptimization of the minimum deviation from measured steady state conversions...
I have correctly assembled the model physics and have a working COMSOL model for the conversion of a certain species. This model does not incorporate any optimization. It is necessary to use...
View ArticleFSI - vibration study of a cylinder in a fluid flow
Hello all, I am new to Comsol. I am trying to study flow induced vibration of a cylinder fixed at one end and free at other. The cylinder is placed vertically against the flow. Is it possible to find...
View ArticleCooling of a metal box
Hallo to everybody! I'm trying to realize the simulation of a metal box (fillled with air and including an heat source, and surrounded laterally by other boxes that I consider through the...
View ArticleList expressions and predefined quantities in Maltab or Java
Hello everyone, I'm looking for a way to find the "expressions and predefined quantities" a model offers within matlab or java. Via COMSOL-GUI, this is simply possible by clicking one of the two...
View ArticleFailed to find a solution due to the relative error
Hello, I am modelling piezoelectric sensor using MEMS module. COMSOL was able to find the solution when I ran the frequency domain study with increment of 1HZ. However, If I ran with smaller steps (ex....
View Articleparametric sweep in a contact problem
The attached file shows a simple axisymmetric problem in 4.3a where a screw-shaped part is being pushed into some uniform bone by an axial force. In the attached model, there are identity pairs between...
View ArticleModeling a light source in comsol
Hello, Very beginner in Comsol. I would like to model an LED light source in Comsol. I understand I can safely model it as an isotropic light source. I was just wondering if Comsol has any built in...
View ArticleProblem "To extract COMSOL data "
Hi I try to follow all the steps that is mentioned in the LIVELINK FOR MATLAB USER GUIDE"Start to load the model busbar from the COMSOL model library, enter the command: model = mphload('busbar'); To...
View ArticleHow to calculate photonic band gap, transmission and reflection spectra?
We want to get photonic band gap, transmission and reflection spectra of 1D or 2D PC. Could you help me how can I obtain band gap and Transmission/Reflection spectra of 1D or 2D photonic crystal? Or...
View Article3D geometry problems
Hello everyone, I am trying to solve an electric field problem using a 3D geometry comprised of five subdomains. The difference between the biggest domain (a cube with the edge of 40 micrometers) and...
View ArticleEigen Frequency Analysis of SAW Devices
Hi, I have a problem regarding the Eigen frequency calculation. I solve a simple 3D piezoelectric substrate (Y-Z cut LiNbO3) width of one wavelength (4 um) and depth of 10 wavelengths with periodic...
View Articlewindings providing regarding
Sir/madam, I am doing my m.tech project in modeling of motor using COMSOL.3.5a in 2D. I would like to know the way in which i can provide my three phase windings in the stator slots. Thanking you and...
View ArticleLinear Extrusion
Hi all. I' m now doing my research on modeling of climbing film using COMSOL. I'm using COMSOL 4.0 and I have problem regarding linear extrusion. Why I can't enter the values for sources &...
View ArticleFluid-Porous Slip boundary conditon
Hello, I focus now on the flow and solute transportation simulation in the free flow and porous media. There are traditionally one singe formulation, typically Brinkman and two-domain coupling with...
View ArticleMultiple-size particle tracing
Hello everyone I have a short question on the particle tracing module. Does anyone know that whether it is possible to simulat particles of different sizes in the same model. How to implement this...
View ArticleMagnetic Force on an armature
Hello I'm dealing with a very simple problem that has been very frustrating for me! I would appreciate if any one can assist me with that. I'm modeling an E-shaped core in 2D magnetic field module. It...
View ArticleEvaluation of Volumteric displacement
Hi all, I am modelling a diaphragm deformed under pressure loading in an axisymetric model. I was wondeing if there is a way to evaluate volumetric displacemnt of the diaphrgam due to displacement....
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