Problem with defining subdomain expressions
Hi!I am working on the project where I am trying to revive old simulations done in Comsol 3. Unfortunetely, some features of the program are very different now. The problem I am currently facing in...
View Articletrasnmission monitoting between silicon layer
I had designed a three layered structure. Using PORT 1, I excited the EM wave from the top of the SiO2 and placed second port(PORT 2) at the bottom of Ag(Silver). I had calculated the reflection and...
View ArticleHeating transfer water
Hi!I have made a heat transfer 3D-model of a plastic container which contains water. There are also 2 blocks of iron in the water. This model is time dependent, I want to see how the temperature of the...
View ArticleHEAT TRANSFER IN A WALL FIXED WITH A INSULATION MATERIAL
Hi, I want to find the heat transfer through a building wall which is fixed with a insulation material. The following physics has to be applied ie, conduction, convection and radiation. So far i have...
View Article2D Cross Section and Parametric Sweep
Dear allI am simulating a Cross section of a 3D problem. Everything goes well, except when I want to sweep a geometrical parameter (with the Parametric Sweep, not Auxiliary of course.)If I do it, it...
View ArticleRetrieving data using Livelink to Matlab
Using Livelink to Matlab In a study with Parametric Sweep (all combinations) and a Time Dependent step there are only two outersolution numbers when there are 24 combinations of (2) parameters. Is the...
View ArticleAdding surrounding air/ambient effect in coupled HT and SPF physics
Hi,I have a irregular block with pipe flow within. Water is flowing through the pipe and the block surface is subjected to certain heat flux. I have successfully coupled these two physics (laminar flow...
View ArticleFatigue material degradation
Hi, I am new in fatigue analysis in Comsol. We know, during fatigue loading material property (e.g. stiffness, strength) of a specimen degrades with the increase of load cycle. Is it possible to...
View ArticleRegarding simulation fiber Bragg grating
Hi all,Does anyone has experience regarding simulation of fiber bragg grating and also using comsol tools to calculate the coupling coefficients of modes in a fiber. Please throw your ideas if you have...
View ArticleInterfacing Piezoelectric Device with Electric Circuit
Hi, I am trying to model a piezoelectric device and interface it with the electric circuite interface. The piezoelectric material should create a voltage, between GND and a Terminal which then should...
View ArticlePlotting equipotential as contour plot without AC/DC module
I am attempting to plot equipotential as a contour plot on a 2D model. I don't have the AC/DC module. Does anyone have any suggestions?Thanks, John Vogel
View ArticleTwo phase darcy Law
I am trying to model a air-water flow in a glass-bead base porous media (with three zones; matrix, fracture and skin)- [the problem definition is attached ]-The model I set up is symmetric 2D Two-phase...
View ArticleCreation of Floating electrode
I m simulating an application which involves collection of induced EMF in a liquid, for the purpose i need to create floating electrodes for measuring the EMF. How to go about?
View ArticleHarmonic Analysis with alternating currents and permanent mangnets in the model
Hello,I want to execute a harmonic analysis to investigate the influence of alternating currents in coils of an AC/DC-Model that includes permanent magnets.How is it possible to "fix" the magnetic flux...
View Articlesimulate viscoelastic material
hi i want to add a layer with comlex modulus in comsol but i face error and it accepts only real part. how can I do this? Thank you.
View ArticleExporting data on mesh nodes
Hi, I need to export mechanical vibration eigenfrequency data which could lie exactly on the mesh nodes coordinates. Although I am able to export quite similar coordinates, there is always a mismatch...
View ArticleEulerian approach
There is a flow channel in which a slurry of coal and water are fed through the inlet. Gravity forces are acting on the domain. I want to see the flow behaviour of coal particles in the channel. Please...
View ArticleScattering by a point source dipole
Hi,I am new COMSOL user and currently using it to model Scattering from a point source dipole.Though ,I am able to simulate the Scattering phenemona from the dipole source ,I have a doubts which is as...
View ArticleDifference between Variables and Analytical Functions
Hi!I would like to aply a heat flux with a mathematical definition onto a surface. I have noticed that there are two ways to do this. I can define the heat flux as a analytical function or write the...
View Articleflyc2s use
I do not know the exact meaning of a,b in flyc2s(a,b) function. I use 5.1 version, can not find the mph-ug pdf under "documentation" mennu. Does anyone have the pdf of detailed funtion use or know...
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