individual mode contributions in Modal Analysis
Hello, I would like to know if it is possible to obtain individual mode contributions in a modal analysis response graph? I have some resonant peaks in my structure whose gains are low and they are...
View ArticleUsing dependent variable values at specific points on a boundary
[Conjugate Heat Transfer v4.0a] [2D Stationary study] I want to use the temperature at two fluid-solid boundaries to generate the boundary condition of heat generation at one boundary. Something like:...
View ArticleHow do I simulate the stress distribution that result in shrink fit of a...
Hi, I model a compound cylinder, the inner cylinder has initial values before the shrink fit; inner radius, ri and outer radius (rc + delta) where delta is the interface displacement due to shrink fit....
View ArticleMath operations with different solutions
Hello. I hope someone can help me with this question. Is it possible to operate with different post-processing solutions? For example, I want to obtain a ratio between a temperature field calculated...
View Articleboundary conditions for hoop stress
Hi, I am new to Comsol structural mechanics and I am trying to solve a very simple problem without any success. I would like to simply solve for the hoop stress on a simple copper ring by applying a...
View Articleusing function
Hi, I have some data like bellow and I want to use the fitting curve through this data as a function. I have tried the interpolation function but this error appeared >> interpolation grid axis...
View ArticleComsol + Matlab / GNU Octave
Hi everybody, I have Comsol LiveLinkMatlab and it is pretty good to access a comsol model in matlab programming environment. GNU Octave is very similar to Matlab and its FREE! Is there any way to...
View ArticleFortran
Hi every one Is it possible to run user written programs (like c, FORTRAN) in comsol?. I need to update some variables which is calculated using FORTRAN code. please can anyone help me?????
View ArticleThe error "Internal error in geometry decomposition"
Please, explain me about this error "Internal error in geometry decomposition".I am using comsol 4.2, i meet the error when i built a new model. thanks you for comment !
View Articleuse modulo for periodic step function
Hi! I want to create a periodic step function to control the input concentration of a contaminant in an aquifer. I want the concentration to be 1 for 3 months and 0 for the rest 9 months. I have...
View ArticleHow can I export an eps image (vector graphics)?
Hello, I would like to export an image of the model geometry as an .eps file (vector graphics). I could not find how to do that and it seems that the only options are jpg, png and bmp. Thank you.
View ArticleNumber of Elements Along a Diameter
When reporting mesh details within the CFD community, it seems to be a standard to report the number of elements along a diameter when workings with a geometry of circular cross-section. Is there any...
View ArticleDiscretization schemes, micromixer tutorial
Dear Comsol users, I kindly ask you to help me with the following task. I have to specify the discretization schemes employed in my model. Since I used an existing tutorial model 'micromixer.mphbin'...
View ArticleMaterials data viewing and editing
Hi. I'm pretty new to COMSOL, and I don't know how to view all of the properties of all of the materials in my model. The edit box inside COMSOL is a bit restrictive in viewing what I'm putting in. I...
View ArticleError in modifying diffusion in electrode equation
I have made this modified model of Li ion battery where I wanted to include stress in the equation of diffusion of Li ions in active particle (for cathode only). Since I am using the standard Li ion...
View Articletransmittance setting problem
Hello, I have used comsol to simulate transmittance of a structure. And I have used two methodd to calculate transmittance. The first method is integration the input port and output port and then...
View Articledesign and simulate Helical filter by Comsol 4.2
I'm vietnamese.I,m final year student.now i'm doing graduation thesis.my theme is "design and simulate Helical filter" and i want to simulate it by comsol 4.2 .I hope everyone could share...
View ArticlePEM fuel cells-Mass transport Analysis
Hi Sirs..Can help me knowing how to construct and simulate the model of Proton Exchange membrane of a PEM fuel cell.The problem I face is,the membrane is coated with dispersed catalyst...
View ArticleMoving ferromagnetic objects inside magnetic field
Dear COMSOL experts, for our research we would need to simulate moving metallic leaves of finite extent inside a magnetic field generated by multiple coils carrying a DC current (i.e. no changing...
View ArticleDerivative of Interpolation Functions
Dear all, I am trying to understand if, given an interpolation function (defined by a table of points in an external file like *.txt file) it is possible to define the derivative (spatial) of the...
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