tumor 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,...
View ArticleSimulation of a floor heating
Hi all, I want to simulate a floor heating in a 2D modell. Floor heating systems release about 90 % of heat in the form of radiation and about 10 % in the form of convection. So is it possible to take...
View ArticleHow I can add data for a solution to a new study?
I'm working on the simulation of an iron foundry, I made a transient thermal study, and I exported data solution in time 200seg temperatures. I would like to know how I can add the output exported to a...
View ArticleComsol issue on Linux
We had a simulation computing for about 3 weeks and paused it to quickly analyse some results. We created a graph and then Comsol stopped responding. It uses 100% of one of the CPU on our Linux...
View ArticleVariables
Hi everyone, I have a simple question for you. If I have a variable 'D' , coeficient difusion, depends to temperature (T) with the expression D(T)=0.29*T. the range of temperature is (900 kelvin to...
View Articleparameters
Hi everyone, I have a simple question for you. If I have a variable 'D' , coeficient difusion, depends to temperature (T) with the expression D(T)=0.29*T. the range of temperature is (900 kelvin to...
View ArticleMie scattering in 4.3
Hello, I have already seen some discussion about mid scattering of a gold nanosphere. But I the discussions I have consulted, no one has yet implemented a mie scattering program in Comsol 4.2 or 4.3...
View Articleoptical Waveguide
Hi I am defining 2D waveguide from Er:Ta2o5 waveguide in top and bottom of sio2 substrate, now i want to define electromagnetic wave to this.and then i want to calculate the gain. 1-how can i excite...
View ArticleReacting flow, diluted species
Dear all, I am currently simulating the reaction of a dilute compound which flows through a cylindrical tube under laminar flow conditions. I am trying to use the physics method "Reacting flow, diluted...
View ArticleWhat type of boundary conditions to use for a part of electric chain
Hello, I'm not really good with DC, but I have to solve one problem connected to it very closly. I have a model of a bimetallic Copper-Aluminium conductor. I know, that the value of generated current...
View ArticleElectron Cloud Confinement
Hi, I am trying to model the confinement of a cloud of electrons in the center of a spherical axisymetric system. The electrons are confined by an electric potential. I was wondering if anyone had...
View Articledeformed parallel plate capacitor
Hi all, I'm working on a model of a parallel plate capacitor in 3D. I'm using the moving mesh, solid mechanichs and electrostatics physics as instructed in others examples. When a pressure is applied...
View ArticleSolving a size modified Electric Double Layer
Hi, COMSOL experts! I been trying to simulate an electric double layer that accounts for species size with Transport of diluted species and electrostatics module using the build in...
View ArticleImporting numeric port
In the RF module, is it possible to import a numeric port instead of automatically using the result of a Boundary Mode Analysis? I'm finding the normal way of doing it to be maddeningly limiting. Thanks.
View ArticlePeriodic boundary conditions in the PDE solver
I'm working on a simple solution for a closure problem related to developing the governing equations for mass transfer in a porous media. This requires a solution to Laplace's equation in a cubic unit...
View ArticleCoefficient Form PDE and periodic boundary conditions
Hi, I'm new to COMSOL so I would like some help regarding the following - I'm trying to perform a phononic crystal simulation using coefficient form pde. I have a hexagon with a circular hole shape...
View ArticleCoefficient form PDE, Zero Flux BC
Hi, Can I ask if there is any way in Coefficient Form PDE, to cancel zero flux BC and apply Periodic Boundary Condition? My file is attached. I really urgently need someone to help me out with this....
View ArticleSound Absorption Coefficient of Materials
Does anyone know how to simulate the "Sound Absorption Coefficient" of materials? I tried to build a waveguide (impedance tube) on top of the materials, but it doesn't work for high frequency.
View ArticleAbout optical force calculation of particles manipulated by microring resonator
Hi,everyone. I want to simulate a structure which includes two bus waveguides and one microring resonator to form an on-chip optical tweezer. One microparticle is placed in the gap area between one...
View ArticleHelp...Which Iterative solver settings for 3D RF module with periodic...
Hi All, Can somebody help me with my solver settings confusion. I'm trying to setup a 3D RF module simulation with around 250.000 elements only with periodic boundary condition. I read that I should...
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