Water balloon deformation
Hello, I've only recently started using this program, so my level of knowledge is not very high. I'm trying to model the physical deformation of a water balloon due to external force (get the shape in...
View Articlecomsol with matlab
Hi, I encountered a problem while using comsol. when I open the icon comsol with matlab, I got "??? Undefined variable "com" or class "com.comsol.model.util.ModelUtil.connect"." Any ideas on what is...
View ArticleProblem in defining analytic function
Hello everyone, Am working on electrostatics and had used an image function for my model. I am trying to define the relative permitivity of as a function of grey scale in image. But whwn i try to plot...
View ArticleResonating magnets
Hi folks, Me and my team-mates are working on a project and we now need to simulate a design we made. We have a tube with a length of 10cm and a diameter of 2cm. At both ends of the tube, say x = -5cm...
View ArticleHow to use stationary solution as initial value for 2nd time dependet study?
Hello Everybody. I’m using comsol 4.3a. I try to use the solution from study 1 (stationary heat transfer) as the initial temperature value for a second time dependent study. Further a new geometry...
View Articlecapacitance of a parallel plate capacitor
These are the steps for my capacitor simulation 1. set two solid blocks (dimensions (25x1x20) ) 1 distance away from each other. 2. set a solid box (65x43x60) to surround the plates of the capacitor....
View ArticleRemeshing a Deformed Mesh in 4.0a
Hi, I am simulating the heat transfer in biological tissue that has been compressed. First I apply a gravitational load, and next I want to run the heat transfer calculations on the deformed geometry....
View ArticleQuestion about example- "Plasmonic wire grating"
Dear all: I have a question about the example "Plasmonic wire grating". In this model, I saw that the Floquet boundary condition applied at the left and right boundary is that kF=kax (wave vector),...
View ArticleInitial Conditions for Sine-Wave or More complex disturbances
Hi Everyone, I have reviewed previous posts in Comsol forum about I.C . One of the suggested ways of applying the I.C was to do a stationary analysts before the time-dependent one. (This can be true...
View ArticleCoupled magnetic and solid-mechanics simulation
I have a question about coupling a magnetic study to a solid mechanics study. I attach to this email a simple model to explain my question. In the model you can find a permanent magnet with a round...
View ArticleDC discharge dc.de_4
Hi, I am starting to use the plasma module and I am currently having a look at the DC discharge example (www.comsol.com/showroom/documentation/model/8640/). During the model set up the value of the...
View Articlethermally resistive layer
Hi everyone, I am modeling a pipe with fluid circulating within by coupling heat transfer and fluid flow and the pipe diameter is defined in the geometry section. i need to define the pipe wall...
View Articleminimum time value under condition
Hi I have a problem on my simulation I have a time dependent simulation and I want to get the minimum time value when a phenomena occur ( The voltage V raise a value above a certain threshlod) I want...
View ArticleSimulation of third order nonlinearities such as four wave mixing in silicon...
Hello; I myself think that simulation of nonlinearities is possible by COMSOL. However, I have not tried it until now. The question in my mind is possibility of launching several fields (several...
View ArticleDrawing a sinusoidal wave in COMSOL
Hello; How can I draw a sinusoidal wave as a part of a geometry in COMSOL? Thanks for your help. Sincerely; Uldouz
View ArticleEfficiency of solar panels – transition line
I want to calculate the efficiency of solar panel, I know that the answer need to be approximate 15% because this information I find in the website of one company that manufacture the solar panels, but...
View ArticleNeed help regarding use of optimization tool for inverse heat transfer problem
Hi, I have just started using "Comsole V4.2a". Can anyone provide me any tutorial regarding a simple inverse heat transfer problem ? The problem may be finding out thermal conductivity k, using known...
View ArticlePart of module
Good day. It is possible to create a report in which it was shown as part of the model? Thank you.
View ArticlePlasmonic wire grating
Hello All, I am trying to remodel the device in the 'plasmonic wire grating' example. As a background reading I wanted to read in depth about this device. It would be of great help if anyone could...
View ArticleSurface temperature dependent heat transfer coefficient
I'd like to apply a convection heat transfer boundary condition to the attached problem. Currently I am using a constant convection coefficient (h=10 W/m2K) on the interior gypsum surface. I have...
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