How to identify boundary edges together
Hi, everyone, I'm new to COMSOL, so I'm still getting used to things, but I was wondering if someone could help me with identifying boundary edges. I've attached the geometry I'm working with right...
View ArticleReference Point for Moment computation
Hello, I am using the 2D beam module in order to model 2 structures A and B and to couple them together through 2 springs. The springs have stiffness in the x and y directions, but also a rotational...
View ArticleProgramming a constitutive equation?
Hello, I want to simulate the fracture mode using a specific fracture model and I don't know if it is possible to program different constitutive models in COMSOL. e.g. The Gurson model (One of the...
View ArticleRe-creating
Hello, I am trying to recreate a classic problem. I have air trapped in a box. The top and bottom walls are insulated. The left wall is at a fixed temperature of 100C and the right wall at 0C. Due to...
View ArticleSymmetric boundary condition in COMSOL 4.3
Hello, I am using Comsol 4.3 now. I am wondering whether it still has the symmetric boundary condition in RF module as Comsol 3.5 or something similar that I can minimize the simulated geomitrical size...
View Article3D Symmetry of Model
Good afternoon all, I am modelling two electrodes (tips facing each other) and the electric field between them. There are two Z-axis layers to each of the electrodes, measured in nanometers, whereas...
View ArticleChanged environment from air to water doesn't alter electric field
Good afternoon, I have two electrodes set apart several microns, with their voltages set to p/m 5 V, and I'm measuring the electric field norm between the two tips. I want to see what would happen to...
View ArticleTransferring values to MATLAB using Livelink
I have constructed a COMSOL model and exported it as a .m file. In the model, I have a derived value corresponding to the strain energy integrated over the volume of my system which I want to extract...
View ArticleHow to get materials fuctions?
Hi I am an absolute beginner to Comsol and I am working on residuals stress of multi layer thin films simulation. Does anyone work with Ba0.6Sr0.4TiO3 or LaSrCoO3? I want to get materials properties....
View ArticleHow to set up multiple input powers for a single port?
Hello everyone, I'm new to COMSOL. I got a question that might be quite easy for an experienced user. Could I enter multiple input powers at a sinlge port in RF module? For example, I only created a...
View ArticleFlux linkages of 3-phase Synchronous machine !
Hi, I have tired to calculated self and mutual inductances of the three phase machine, followed the method defined in paper attached with this message. Could any one please check my model and tell me,...
View Articlevolume force on dispersed phase only?
hi everyone i am relatively new to comsol and ran into a perhaps simple problem: i'm simulating a two-phase mixture model in the chemical engineering module. i want the dispersed solid phase to be...
View Articleabout helix geometry modeling
Hi, I am trying to model a spiraling geometry (helix-like) with a complicated cross section. Does anyone know how to do it with comsol 4.2/4.3a? I used the build-in "helix" one but that was with a...
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...
View ArticleVoltage 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 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 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...
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