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View ArticleBaw Resonator Problem
Hi I am working on a baw resonator. For our simulation we have considered a 3.5a COMSOL 2D model of Thin Film Bulk Acoustic Wave Resonator in the model archives of COMSOL. So we treid to simulate the...
View ArticleMultiple input ports in RF problems
Hello, I'am doing a simulation with RF module. It's about the mode analysis of a rectangular silicon waveguide. There are two waveguides. To propagate the monochromatic light of 1550nm (1.935e14 Hz ),...
View Articleprescribed dispacement
Hello, I'm trying to do a simple thing with structural mechanics module, but I don't get convergence. I attached the model. I'd like to apply a prescribed displacement at boundary 2 and check the...
View ArticleError to initialize a physics interface created with Physics Builder in...
Hi all, I am trying to compile with LiveLink for Matlab (Matlab version MATLAB_R2012a) a Comsol model (Comsol version COMSOL 4.3.0.151) that uses a physics interface which I created with the Physics...
View ArticleSpatially-varying boundary condition (electric potential)
Hi all! I am using the Electrostatics package and need to define a surface with a linearly-varying electric potential that depends on one dimension of the model (e.g. V(x,y) = Kx). I tried to define a...
View Articleheat generation calculation
Hi, I am modelling microwave heating by Comsol 4.2 I used heat source domain and electromagnetic power loss density as heat source but I couldn't calculate heat generation terms (W/m^3) When I use...
View ArticleRectangular Pulse Train Creation
Hello, I am attempting to create a pulse train for my model. I am new to introducing pulses and would like an equation to place on my electrcial potential module to create the following: Rectangular...
View ArticleSurface tension as a variable
Hello all, I have a general question about surface tension in COMSOL. Can surface tension be assigned as a dependent variable? More importantly, can it vary in time AND space? Or be assigned as a...
View ArticleAC/DC Module Boundary Condition
I am currently working on a project to model a section view of a human forearm. The model terminates just before the elbow and the boundary condition there is a problem for me. I currently have the...
View ArticleVector operator expansion ∇·(c∇u) in 3D
hi I am working on a set of coupled differential equations in the equation based modeling (3D). Assuming that u=[u, v, w]. I am looking to evaluate the term ∇·(c∇u) to obtin the matrix c. I was...
View ArticleWeak form of Electric field , test(pzd.EX)
Hey all I am working in the 2D piezoelectric module and I want to take weak forms of Electric field in different direction, test(pzd.EX) and test(pzd.EY) but its showing error. When I try by making the...
View Articlestudy the effect of voltage on piezoelectric microgripper
hi,i want to perform the pressure and strain analysis (by varying) on the microgripper model given in comsol 4.2.please help
View ArticlePeak Temperature Optimization in Laser Heating
In a laser surface heating model the peak temperature achieved on the surface of the material is dependent on the material properties and on the laser parameters. For a given material (Cp, , k) beam...
View Articlefrequency domain study with external circuit
Hi The comsol model gallery includes a frequency domain model of a capacitor. I added an external circuit coupled to the capacitor and a time dependent study runs OK (as shown in a separate gallery...
View ArticleOrientation of legends when exporting as .eps
Hello, For some mysterious reason, the legends are turned "upside down" when I try to export a 1D plot as .eps as compared to when I save the exact same picture in any bitmap format. By upside down I...
View ArticleHow to create a spiral inductor in COMSOL
Hi, I am a new learner of COMSOL. I would like to learn how to create 5 uH spiral inductor. I have researched on website but I could not find the tutorial step by step. I saw only in AC/DC Library with...
View ArticleLicense error: -38
Hello, Whenever I try to run COMSOL 4.3, I get this error : License error: -38 User/host on EXCLUDE list for product User/host on EXCLUDE list for feature Feature: CADIMPORT license path: C;\Program...
View ArticleCOMSOL 4, TE and TM modes
In previous version of COMSOL (e.g. COMSOL 3.5) it is quite simple to choose TE or TM modes analysis. In the COMSOL 3.5, in the model navigator I can choose "In-Plane waves" or "Perpendicular waves"...
View ArticleUsing Google Sketchup for designing geometry
Has anyone found a way to export geometry from Sketchup to COMSOL? I cannot seem to find a format that works in practice. Are there any special considerations to make when converting/exporting the...
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