Euler-Euler Method
I want to use Euler-Euler Method for the simulation of fluidised bed. I have three phases in my problems, one is gas, the others are wood phase and sand phase. I see that the number of phases defined...
View ArticleALE + Coefficient PDE form problem
Hi all, I want to model a mixture of two fluids, as one of them gets evaporated. I have all the equations for mass balance, and defined a PDE Coefficient form with Neumann boundary condition over the...
View ArticleSpacial Variable
Hi everyone, I want to model ICEO, which involves electric field and electroosmosis flow. Firstly, I can get zeta potential by simply take the difference between double layer, this potential drop is a...
View ArticleSpacial Variable
Hi everyone, I want to model ICEO, which involves electric field and electroosmosis flow. Firstly, I can get zeta potential by simply take the difference between double layer, this potential drop is a...
View Articleimporting 2D mesh in comsol ?
Dear All, I am using a geometry imported from CAD and i d like to select a single face and transform it to get only to work in 2D. Basically i d like to solve it in 2D. How can i do to import geometry...
View ArticleNormalized electrical field??
Hi! I'm looking at modes in a waveguide. To obtain the electrical field of the diffrent modes COMSOL solves an eigenvalueproblem and gives me the egenfrequencis. But how does COMSOL normalize these...
View ArticleRF Mode Analysis Normalization Convention
Hi all, This question is in regards to: RF Module > Electromagnetic Waves > Mode Analysis Does anybody know the normalization convention that is used in the solutions? For example, part of the...
View ArticleNormalize mode's energy
I am designing an optical waveguide, and by using COMSOL I am trying to find its mode. Now, I'd like to normalize the mode's energy. I mean, as you know there is a color bar on the right side of the...
View ArticleIntrinsic stress in Structural Mechanics Module or MEMS Module
Dear all, I'm simulating the stress distribution inside a waveguide that is cause by material having different thermal expansion coefficients. My simulation uses Structural Mechanics module and is...
View ArticleMagnetic field
Does anybody know how to write this expression on comsol ( ∇/B/^2 )? I meant expression that replace "the gradient of the magnetic field norm square". Thank you
View ArticleFluid flow due to temperature differences
Hello, This is not my strong side so I would appreciate some recommendations. I want to calculate the cooling oil flow in a cylindrical geometry in which there are a number of heat producing elements....
View ArticleProblem coupling heat transfer in fluids and turbulent flow
Hello, Im runing a simulation about a flow that enters a cilindrical reactor by a cilindrical ( smaller radius) cylinder. I had solved the velocity profile with the turbulent flow physics and obtained...
View Articlesaving comsol 4.3 as "fem" variable
Hi: I am wondering if it is possible to save comsol file as "fem" variable so that I can write a small code to extract the fields from fem in order to normalize them. I used to do this in comsol 3.5...
View ArticleI cannot get velocity field profile of fluid when adding heats...
Hi! I'm simulating non-isothermal simulation and my problem is I cannot get the velocity profile. I can see the temperature is changing due to heat source from underneath but I do not know why the...
View Article2D Power Density
Good Afternoon, I am having some trouble calculating what my power density should be in my 2-D model. I am modeling a cross sectional cut of a heated aluminum plate in air. In my experimental runs, the...
View ArticleMagnetized plasma
Hi Every body I am modeling a low pressure (50 mBar) plasma in 2D Axial Symmetric geom and I want to study effect of strong transverse magnetic field (in phi direction) on it. This static magnetic...
View ArticleCAD import file boundary conditions
I have a 2D model I've imported from CAD that consists of many interlinked hexagons making up a larger hexagon (like a big hexagon with smaller hexagon-shaped holes throughout). I'm trying to do a...
View ArticleBoundary conditions in Equation-Based Modeling
I am trying to solve a set of three "Helmholtz-type" equations using the Equation-Based Modeling of Comsol. There are three independent variables, call them u1, u2, and u3. The equations are (with some...
View ArticleALE+ PDE form
hi all. I have a PDE coefficient form for evaporation of fluid in a fluids mixture. The governing equation has the general form of: d(X)/dt=d{D(X,T)*d(X)/dz}/dz in above X is the evaporating fluid...
View Articletumor ablation model
hello, i am trying to make a model like" tumor ablation" model in comsol Heat Transfer Module but i want to change the current from DC to AC current and i want to plot the electric field distribution,...
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