Does COMSOL support simple matrix operations?
The below post is related to an archived discussion[start here]I need to define a matrix variable M as an expression of matrix products. For example, M = A * B. A and B are known. One certainly can...
View ArticleError message - Coupling between electric field distribution, temperature and...
Dearl all,I´ve used Comsol version 4.4 for generation of a electric field distribution coupled with temperature and fluid dynamic in a coaxial treatment chamber for liquid sterilization purposes. A...
View ArticleSimulation on Spin Coating of Droplet
I wonder that it is possible to numerically describe shape on droplet or film on spin-coater by COMSOL. If possible, does it simply need centrifugal force as body force for the liquid and wetting force...
View ArticleSimulation of Architectured Cathode Peformance
Dear COMSOL Users, I am new to COMSOL and just getting started with the Battery Module. In my lab, we are exploring how architecturing electrodes can be used to fabricate high energy density, high...
View ArticleAcoustic source point set up
I have a question on the Acoustics module in Comsol, regarding how to set a monopole acoustic source. However, I understand that in Comsol, to set a point source, we are supposed to go to Physics >...
View ArticleSet initial values for heat transfer module: solid domain surface
Hi everybody, I am modelling the thermal gradient within a cylinder containing water, which is heated by a solid spherical element in the middle of the cylinder. I am using the heat transfer in fluids...
View ArticleMoving free surface in liquid flow model
I have modest experience in using COMSOL, very limited in fluid flow modelling.I've encountered a new type of problem for me, & so far cannot 'get started'; any pointer to similar examples etc...
View Articleobtain temperature data over a line at a particular time
I would like to obtain a table of the temperature over a given line in my model at a given time. Is there a way to do this? I see that I can do the following, but these aren't quite what I'm looking...
View ArticleTotal power in 2D heat transfer model
Hi,I'm new to COMSOL, and I'm doing a 2D heat transfer with a constant heat source (constant power density). The power density has a 3 dimensional unit (W/m^3), so even though I defined the geometry...
View ArticleImplementing the boundary equations in Stokes-Darcy Interface
Hi everyone, Working on Stokes-Darcy coupling of two simple rectanglar 2D domains, the fluid flows in the Stokes domain first then penetrates into Darcy's, there are three simple equations that must be...
View Articleinconsistent initial value, two phase Darcy module
The below post is related to an archived discussionI have the same problem, may I ask to share the resolution if you figured it out ?
View ArticleRealising the Geometry of a toroidal coil in COMSOL
Hello everyone,I want to realise a toroidal coil in COMSOL, to make a magnetic and electric field simulation later on. For the iron core i created a torus. For the windings i tried to realise it with a...
View ArticleWhat material is present by default in a hollow space?
Assume that I have a large acrylic block. Now, I machine a small circle in the center upto half way in the acrylic. Then I place an eleastic membrane on top of the acrylic such that the hole inside is...
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Calculate the scattered electric field at the site where the source is placed?
Hello everyone, would you please help me about the following question?The spontaneous emission of an electric dipole can be viewed as the forced oscillation exerted by the electric field it produces:...
View ArticleJAVA API for the image export
The below post is related to an archived discussionI enter the comsolserver -graphics command in the cmd, it did not emerge any errors, is it that means I am in the server mode? when I continue to run...
View ArticleMagnetic Field Formulation (mfh) 2D - Continuity and Identity Pairs
Hello everyoneI've created an Identity Pair through Form Assembly in Geometry.But when I add the node "Continuity" in the physics menu, and I choose the identity pair, a message appears: "Unexpected...
View ArticleBoundary selection for thermal insulation - non-isothermal flow
Dear all,I have used a non-isothermal flow coupled with heat transfer in a application of pulsed electric field for liquid sterilization. For definition of the boundary condictions for thermal...
View ArticleTemperature time-transient study: Steps taken by solver
Hi,I am using COMSOL 4.3b and my model is a simple cube where I specified a heat source as having two different values. For my goal purposes, I am doing a time-transient study where from 1s to 2s heat...
View ArticleGrounding problem: inject voltage/current in a conductor buried into a soil
Hi, I’m trying to simulate a problem that consists of a vertical cylinder conductor, with a certain radius and length, buried into a cylinder material like soil, with conductivity equals to 0.01 S/m,...
View ArticleError in Mesh
I have a problem when doing a model for microstrip patch antenna. I got the following error**[[A problem occurred when building mesh feature 'Free Tetrahedral 1'. The current physics settings induce a...
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