Voltage Induced in a Coil by Moving Magnet
Hi, I am trying to learn how to use moving mesh. And I created a project same as "Voltage Induced in a Coil by Moving Magnet", which can be found in Comsol website. But the problem is: when I run it,...
View ArticleSynchronous machine (torque)
Hi, I am new to COMSOL. I am tryng to build three phase synchrnous machine model. I have applied three phase voltage to the machine but unable to generate torque in a machine, I do not waht is wrong...
View ArticleMass flow unsymetric matrix error
I am trying to do simulation of turbulent flow through a valve. I have a problem that the pressure variable seems to become unsymetric as soon as I have flow through the inlets of the valve. I am able...
View ArticleGRI Mechanism 3.0
Dear Sir / Madam I need to model two counterflow burners for measuring the NOx formation in case of natural gas combustion. For this purpose I need to upload the entire GRI Mechanism of methane...
View ArticleModel-step index fibre
Hi, I saw a pdf conference, in the Comsol conference 2010 with Anil Prabhaka and his work was about the Engineering Light and in the presentation he shows Model Library was a Tutorial called Step index...
View ArticleInduced voltage in a coil
Hi, I'm modelling an eddy current testing probe with the AC/DC module. The model is 3D, and I have a transmitter coil with an applied current and also a receiver coil with no current. I'm doing a...
View Article2D Electrostatic module
Dear All I am using the 2D electrostatic module and used the Remanenet electric displacement option for the form of the constitutive equations. D=Dr+Eo*Er*E Dr is the Remanenet electric displacement Eo...
View ArticleSymmetry Fluid Flow
Hi there, I am a research student and currently working on the simulation of 3D droplet formation in micro-channel. I have a question on the symmetry geometry problem. When I set the symmetry settings...
View ArticleExploiting symmetries while using Floquet boundary conditions
Hello! I have a periodic structure which utilizes Floquet BC's. The cubic unit cell has uniaxial 4-fold symmetry about the vertical y-axis. I am using a periodic port to launch a TM mode wave,...
View Articlesingularity error
Hi, I am trying to solve a time dependent, 2D, multiphysics problem using "Transport of Diluted Species" and "Electric Current". In my model there are basically 5 domains in series: at all of them and...
View ArticleRF module surface current relative phase
Hello, I have two surface currents in the RF module, and I would like to specify a relative phase between the two currents. Is it sufficient to specify one of the density components as having a phase...
View ArticleFillet does not work
Hello, I've been working with a 2-D geometry and have been using the fillet tool to round the corners of a rectangle. I have been using this geometry for months and it has worked fine. However, today I...
View ArticleComsol and the Intel Xeon Phi
Hello everyone, We are considering building a workstation for use with Comsol. Does anyone know whether Comsol supports the new Intel Xeon Phi many-core co-processor, and whether it uses the Xeon Phi...
View ArticleThin, planar multicoil electromagnet
Hi! I have been trying to model an electromagnet in 3D that is flat and coiled like a spiral on a 2D plane (so the coils get smaller as they progress towards the center of the 2D structure). It would...
View ArticleMaximum Temperature plot
I'm trying to plot the value of the maximum Temperature in a subdomain during a transient event. Any suggestions on how to do this?.
View ArticleRF MEMS SWITCH
Hi sir, i am doing my project using comsol software.title was A NON-CONTACT TYPE RF MEMS SWITCH FOR 24GHz RADAR APPLICATIONS.here my switch is a capacitive shunt type switch which is actuated by...
View Articleregarding the error occured during simulation
Iam designing RF mems switch I got this error while computing Failed to find a solution for the initial parameter. Segregated group 2 System matrix is zero. Returned solution is not converged. Kindly...
View ArticleHelp understanding detailed solver log and time-step size selection
Hello Everyone, Could someone please help me understand what is happening in this excerpt from one of my solver logs? I'm trying to understand what exactly the non-linear solver is 'thinking' so that I...
View ArticleSimulating pull-in with contact pair
Hi everyone, I followed the model name "electrostatically actuated cantilever" in model library to build my own model - an RF MEMS shunt switch with fixed fixed beam. In the "electrostatically actuated...
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 =...
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