creating a new material
Hi All, I want to make a portion of my model out of a particular material which isn't included in the built in library. How can I create a new material and add it to the library? Many thanks, B
View ArticleIs there any way to debug in COMSOL? I mean, to solve step by step
Hello, I think this is interesting. It would be very useful for me if there would be a way to run a model step by step. I am working in Time Dependent, with PDE equations, and I cannot find the mistake...
View ArticleGenerating mechanical waves in a tissue phantom having different shear moduli
I have been trying to simulate mechanical waves in a phantom tissue, having some different tissue properties such as shear modulus, using COMSOL. When I used poroelasticity waves under Acoustic Module,...
View ArticleField behind metal shield
Dear Users I want to model the following simple case. Within vacuum, a 2D body carries a surface charge. Next to it is a metal body. I want to obtain the quality of the field direction behind the...
View ArticleExternal functions : passing (variables and) unknown functions
Dear all, I'm actually using Livelink for MATLAB in order to solve a 2D time-dependant PDE in coefficient form, which is supposed to return a function u(t,x,y) One of the coefficients might depend on...
View Articleswitching between results
A very easy and quick question is there an easier way of switching through all the results of say a frequency sweep. http://i.imgur.com/U1yVh.gif this is what I do now and its soooooo tedious... ps it...
View ArticleHow do you know which resonant frequency of the cantilever is the proper one?
Hi, everyone. I'm quite confused. It's a rectangular beam,with one end fixed. Then I do the eigenfrequency study. When I apply different mesh method to the beam, for example, first I use Free...
View ArticleDirect influcence over automatic time-stepping?
Hi everyone, I'm wondering if it is possible to have a model influence the time-stepping algorithm directly? I know that certain things will cause time-stepping issues and I would like to 'inform' the...
View ArticleDimension of a exported data array
I have two model, and I need to graph with matlab the difference. I plot with 1D graph a first model, and export the graph; then i plot with 1D graph the second model, and export the graph. My problem...
View ArticleInterpolation function file
Hi people, in my Heat Transfer simulation I use an interpolation function input with a spreadsheet file. All work OK! But when I specify the file name and load it, the form change shape: the file name...
View ArticleSimulation with a very high Peclet Number
Hi there, I'm working a geothermal problem, when I put the variables to work with the simulation I got a very high Peclet number, then I need to know if it's possible to stabilize the solution, and...
View ArticleSinusoidal Stress Time Dependent Study
I have been attempting to model a simple 5mm cube fixed on one side and with a sinusoidal time dependent stress on the opposite side. This should produce a propagating shear wave. I want to do this in...
View ArticleVolume calculation
Hi, I would like to calculate the deformed volume of a half ellipsoid void embedded in circular domain caused by internal pressure boundary load. I try to use deformed mesh but I did not get any...
View Articledeformation of a dielectric
Hello everybody, Am trying to simulate the deformation of a material with the application of electric potential.Which physics should i choose? Thanks in advance.
View Articleproblem with Implementing two region diffusion
Hi all, I've big problem with two region diffusion. I have two region and each region with a laminar flow and solute transport physics.I want to let each system to diffuse free across the boundary...
View ArticleComsol not following ideal gas law or conservation of mass
Hello, I am currently working on modeling a high temperature hydrogen heat exchanger. I decided to start as simple as possible and just model the heat transfer into an axi-symmetric tube of hydrogen...
View Articlecomplexity of the model
hi, i m modelling a 3d capacitive comb drive acclerometer, wen i mesh the model it shows " out of memory in mesh processing" hw to resolve dis error n cud u tel me hw the complexity of d model can be...
View ArticleElectric Field in an object place in an EM field
Hi, I am quite new to COMSOL and with some help from tutorials I have built this 3D model where a cylinder is placed in the electric field radiated by a dipole antenna. To calculate the Electric field...
View ArticleMagnetic Fields, No Current
Hi everyone, So I've been trying for a while now to bypass the problem of creating an external magnetic field in *other* AC/DC modules; but now I see that in the MFNC there are two options: External...
View Articlefemur modeling
Hi! I am building a model of femur(thigh bone) and aim at studying their stress and strain distribution on applying a pint load.I have built the model but it doesn't seem to compute,and i can't figure...
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