Assign number of processors to a Comsol server
Hi, the option -np sets the maximum number of processors that Comsol is allowed to use. When Comsol is started in server mode this option seems to be ignored. For example Comsol server is started...
View ArticleOperate with the solutions of a parametric sweep simulation
Hello I have solved a problem using the parametric sweep simulation. Now, of course, I have a result for echad parameter, now, what I want it is sum all of these results, what I do not how to do it......
View ArticleOptimization of the minimum deviation from measured steady state conversions...
I have correctly assembled the model physics and have a working COMSOL model for the conversion of a certain species. This model does not incorporate any optimization. It is necessary to use...
View ArticleStore the data points into the created table
Hi, I have problem is that what kinds of ''form'' can store into the table. I just want to interpolate the 2-D plot, however, when I want to the store the "2-by-N array" into the table, the problem is...
View ArticleWork on COMSOL through MATLAB
Hi I would like to run COMSOL from MATLAB. I saved the model as M-file and tried to run it in MATLAB. I found the error. MATLAB command line showed ??? Java exception occurred: Exception:...
View Article[SOLVED] "Solution not initialized" when using Livelink for Matlab
(Documenting for others' possible benefit.) This error happened: ============================================================ Error using com.comsol.model.impl.SolverSequenceImpl/getPVals Java...
View Articleparametric sweep
hi, can we use geometry parameter like (length, width, height) in parametric sweep, i want to see how the output changes with variation in geometry
View ArticleModulo function for making pulse train.
Hi, Trying to make a pulse train by combining the heaviside function with the modulo function, as described in a previous post. The heaviside works fine for one pulse: (flc2hs(5- t),1) But when I...
View Articletime dependent boundary conditions
hello all.. i am solving a time dependent heat transfer problem.. at the start ,for a rectangular domain boundaries 1 and 2 are insulated and 3 and 4 are assigned with constant temperature.. after some...
View ArticleStop condition in Electromechanics(emi)
I would like to implement a stop condition similar to what is described for a moving mesh problem. The parametric study would stop when the mesh quality is lower than a certain value, inorder to...
View ArticleMeshing and convergence problems
Dear Comsolians, I was finally able to draw the problem in 3D in Comsol :), am also a beginner, lol. The way I have modeled the coils is that they do not form a complete closed loop, thus I assigned...
View ArticleCoupling Surface Charge Density from Electrostatics to Electrical Circuit
Hi, I have made a model of a varying overlap capacitor with an electric potential on one side as an electret. It seems to work with just ES and ALE but once I add in CIR and set the top electrodes as...
View Articlecurved beam
Hi, How can I change the radius of curvature of a reinforced concrete straight beam inorder to come up with a curved beam?
View ArticleMultiple concentration step function
Hi, Have a great day. I am a new user of comsol 3.5 version, currently, I am working with chronoamperometry and I am trying to simulate that one using comsol by multiple concentration step functions....
View ArticleElectrostatics using deformed result of solid mechanics
Hi, I am new to COMSOL, using version 4.1 to simulate a flexible capacitor. The goal is to have the geometry deformed using a Solid Mechanics simulation (which I have done) then simulate the behaviour...
View Articlecubic bezier curve
Hello! I have some problems in a project: In the geometry I attached to this message I designed a part of tensile test sample to simulate the stress and strain in the sample. Between the upper, broader...
View ArticlePiezoelectric Device 3D
I'm a quite new user in Comsol, and I have some doubts about the Piezoelectric Devices (pzd) Module. I have built a model with 2 ceramic rings (see the model in the attached file), that are suposed to...
View ArticleSolution isn't converging
Hello everyone, I'm having a problem with my simulation, where it isn't converging. It's a very thin plate (10 nm) of graphene, and the dimensions of it are around 0,5 um. I've made a simulation where...
View ArticleGeometry of a cylinder
Hello! I am a beginner in COMSOL and i would like to ask you about the dimensions of a cylinder in 3D! In my model i have to design two cylinders with the next dimensions: the first one with radius =...
View Articlesimply supported beam
Hi, How do i define the constraints for a simply supported reinforced concrete beam which has both truss and solid mechanics elements. Do I use boundary conditions or edge conditions
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