Same model but Convergence Problem
Hi I have a model (using solid mechanics and heat) which is setup in 4.2a and I get excellent convergence. I have alos setup the exact model in 4.3a no changes been made in any boundary conditons or...
View ArticleHow to see the plots after running in batch mode?
Hello! I managed to get comsol to run in batch mode (Linux). However, after I open my newly created output model file out.mph, I do not see any graphs available. I am solely interested in CFD module,...
View ArticleUse of Ports to calculate the Transmittance and Reflectance of an array of...
Hi everybody, +Problem: I want to simulate an square array of gold nanorings, in order to get the graphs for the transmittance and the reflectance and find the resonant frequency. +My first approach:...
View Articlehow to draw a rectangle on a 3D cylinder's surface ?
hey ! we are working on the simulation of MEMS Based pressure sensor for biomedical applications. We are not able to create the heater element which will heat the liquid inside the cylinder. Kindly...
View Articlemode analysis for 2D slab waveguide
Hi, Everyone, I am new for using comsol, and firstly I built a easy model to learn. It is a 2D slab waveguide (see attached ). By mode analysis, I found the effective mode index obtained by comsol is...
View Article2D hinge in compliant mechanism
Hi all, I am trying to simulate a compliant mechanism as seen in the attached picture but I am having difficulties simulating the rotating pin in 2D. As see in the picture the structure is composed of...
View ArticleNot able to properly use remesh feature in multiphysics stationary simulation
Hi, I have simulated a steel specimen that becomes deformed due to bending. For that, I use the solid mechanics interface in a stationary study. Parametrizing the magnitude of bending also works....
View Articlestress corrosion cracking
Is it possible to be stress corrosion cracking? The steel structure has tensile stresses and would be susceptible to stress corrosion cracking. Thanks -- Arthur Rupel
View Article"comsol batch" crashed with Java errors
Hi, I am trying to run a CFD model using the batch mode but crashed with some Java errors. The same model runs fine using the GUI (comsol client) and a Comsol Server. OS: SLES 11 COMSOL version: 4.0a...
View ArticleSImulation of an electrostatically actuated beam
Hi, I am new to COMSOL and presently trying to simulate the pull-in instability of electrostatically actuated micro beams in COMSOL MEMS module. I need further insights into the following topics...
View ArticleHeat conduction in solids - temperature dependent heat transfer coefficient
Hi, I would like to solve a simple heat conduction in solids problem with a temperature-dependent heat transfer coefficient at one of the boundaries h(T) = 1000*(300/T)^1.3 However, the result computed...
View ArticleContinuing Modeling Issues with 2D & 3D piezoelectric SAW model
Hello all, I’m in desperate need of help with my model. The initial model setup is a 2D cross-sectional SAW device where I have silicon, a metallic electrode as my ground, a buffer layer, a...
View ArticlePlotting the gap distance variable
I am trying to do something very simple, but it doesn't seem to be intuitive. I have a contact pair in the structural mechanics module and I want to plot the gap distance variable as a function of...
View Articlemagnetic shielding with mumetal(nonlinear - saturation)
Hi I need some help with my model.... I have a 3D sim, A current line that generates my field and a mumetal infinite plane(1m*1m*0.5mm) The 0.5mm is the thickness of my mumetal. I have 0.5T on the...
View ArticleCalling variable or convert T(x,y,z) = >T(x,y,t) between models
Hi: Please help! I'm very stuck with a quite straightforward problem. I've got two models: 1) Model 1: 3D Heat Transfer Stationary 2) Model 2: 2D Teat Transfer Time Dependent. How can I call T(x,y,z)...
View ArticleHow to set displacement from study 1 as prescribed displacement in study 2?
Hey, I have a trouble with defining a prescribed displacement. Let's say that i received displacement of the edge caused by heating of sample. But displacement of this edge is different in every point...
View ArticleImporting real data heat flux boundary condition to COMSOL
Hello all, I'm working on a 2D transient heat transfer project and I can't figure out how to import real data for heat flux vs.time in COMSOL. It only allow me to input a fix value or function, not...
View Articleeddy current
how to get the imaginary component (phase) in the inductor in the high-frequency alternating magnetic field? Comsol 4.2a Help me please
View ArticleLocal maxima of solution
Dear all, I use comsol to solving a certain EDP problem (Laplace equation for exemple in crown domain: 2D or 3D domain). The solution is noted 'u'. I want to calculate the all local maxima of the...
View Article"No frame is defined for 0D applications"
Hello again. I am trying to simulate an E-core transformer. When I click the study 1 and select the show default solver there is an error occurs "No frame is defined for 0D applications" . What is it...
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