Building a mesh having in a thin gap in between two beams
I am using the piezoelectric devices interface (pzd). Some layers are linear elastic and other - piezoelectric. The surrounding block is air and I defined it with the electrical material model. I want...
View ArticleLiveLink
Dear sir, Is there a LiveLink extension in COMSOL 3.4 version for importing files from AutoCAD to COMSOL?? Please help me out how to find it in my installation?? Thank You...
View Articlesolvers in 4.3a/4.3 version
Hello I am interested in accesing solver information for ODE/PDE in Comsol. So far I was using the Matlab - COMSOL connection in 3.5 version which was showing a sequence like: fem.sol=femtime(fem, ......
View ArticleScattering Cross Section
Hello All, I am trying to find the best way to calculate the scattering cross section in COMSOL for a 2-D cylinder. I eventually will move to 3-D spheres and cylinders. What I have is a circle of 30 nm...
View ArticleProblem: Oil Droplets Seem To Dissolve In Water (Two-Phase Flow, Level Set)
I have a problem with my "Two-Phase Flow, Level Set" simulation in COMSOL 4.2. I am trying to simulate the formation of oil droplets in water by hydrodynamic flow focusing. The water and oil are...
View ArticleSurface Integration with different modes
Hi all, I have calculated the results for the different transverse modes in an optical waveguide using the Mode Analysis solver in the RF module. Now I want to perform a surface integration across one...
View ArticleStructure with 2D and a 1D truss...
Hello all, I am trying to implement this (see attachment). I guess it should be relatively easy, and for sure lots of people know how to do it :). After "spending" quite a lot of time, I decide to...
View ArticleSector symmetry on a 1/5 3D electro motor
Hi All, i have a 3D model that shows only 1/5 of whole motor. It has 3 phase and 5 pool pairs. i'm using rotary machinery modul 3D. if i disabled all continuity BC on the outer slice surface, it...
View ArticleUnexpected results with "Ground" BC
Hello, I do most of my modelling using electrostatics steady-state solutions. One thing that comes up in my models alot is a grounded metal object in a linear, vertical electric field as shown in the...
View ArticleTwo interdependent studies - but I cannot use results from frequency domain...
Dear all, How can I use the result from a parametric (parameter 'b') sweep-frequency domain study (e.g. emw.Ez(b) ) in another function defined under Definitions (e.g. f(emw.Ez(b)) ) which is used as...
View ArticleRadiation in conjugate heat transfer
Hello all, I have the CFD module and am using conjugate heat transfer. This means that I don't have surface to surface radiation but I do however have surface to ambient radiation. I am modelling...
View ArticleDiamond Young's Modolus Property confusion
Hi Comsol Community, the Young's modulus property of diamond in the Comsol material library is 105 x 10^9 Pascal whereas the proper property value in literature is an order of magnitude larger: 1220 x...
View ArticleHow to implement Valveless Piezoelectric Micropump
hello everyone. Is there any way to have a hold on the model presented in this paper for a piezoelectric micropump?"Design and Simulation of Valveless Piezoelectric Micropump" I have difficulty linking...
View ArticleMaterial properties in axialsymmetric form for 2D axialsymmetric simulations
I have the following problem: I'd like to perform a 2 dimensional axialsymmetric simulation of a piezoelectric thin film on a silicon bulk and a round metal electrode on top. Since the coordinate...
View ArticleFollowing the manual but got the false result
Dear all, It's weird that I followed every step in the manual but got a wrong result for thin layer diffusion model. I'm a COMSOL beginner user; would anyone who knows the reason tell me how to resolve...
View ArticleIssue with temperature distribution
I am using COMSOL for simulating heat generated by current through a metal bar for my 3rd year dissertation project. I am having an issue with the output following the simulation. I have applied a...
View ArticleInterpretation of results
Hi, what is the difference between "Line Integration", "Line Maximum/Minimum" and "Line Average" under subnode "Derived Values"? What is calculated specifically? How to interpret the results? For...
View Articleparametrize the position of a point in the geometry gives an error message
Dear Comsolfriends, I want to do a parameter study for the size of my geometry, but I get the following error when trying to set the position of a POINT using a parameter defined before in MATLAB...
View Articlesave the mesh points into a text file
How can I save the mesh points into a text file or some similar? Thanks!
View ArticleInaccuracies in the formulas of the Materials Browser.
Let's work with Structural Mechanics Module> Thermal stress. The temperature at which there is no change in size of your model, called Tref. L (T) - the size of your model at a temperature T. To...
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