electrostatic force cause displacement in parallel plate capacitor in COMSOL
Hi, I have been designed a parallel-plate capacitor in COMSOL. Where one plate is connect to voltage of 10V and other one is connected to GND. and a air box is around the parallel plate capacitor. As I...
View ArticleApparent inconsistency in induction heating solution methods
Hi everyone, I'm new to COMSOL 4.3, and I'm trying to properly use the induction heating module. While modeling the problem of a current loop heating several iron inductors embedded in water in 3D,...
View Articlestreamline problem
Hey, i am having some problems creating the steamlines for my Helmholtz coil. I followed the steps for the one of the model on comsol website for Helmholtz coil except other than revolve to create the...
View ArticleUse of global equations - An unexpected behavior depending on equation sign
I have submitted the following case in October 12, 2012 11:44....I do not yet get an acceptable solution. Maybe one of you has a solution to this. Dear Support, please have a look to my attached model....
View ArticleHeat in inductor using Induction Heating
I'm working on a model to see the temperature in all of the parts within the inductor. Since I'm using the Induction Heating physics I have to excite the inductor using Lumped Ports. However the...
View ArticleThermal expansion of a liquid
Hi all, I’m am trying to produce a model of a fluid enclosed on all sides except one by fixed constraints(walls), on the remaining face a thin diaphragm is in contact with the fluid. As such this is a...
View ArticleMoving mesh ALE
Hi, I am simulating a moving boundary with ALE method. My program is working fine with a certain geometry, mesh and time, but if I would like to change the geometry or set a larger time, then I get a...
View ArticleDefine a function like Linear elastic-perfectly plastic behavior.
How can I define a load which increase linearly up to time t0 and then stay fix by time. I defined something like "F*(rm1(t<t0)+step1(t))" which step function location is time t0. the only section...
View ArticleRecreating Jet Flow in COMSOL
I have temporal and spatial velocity profiles that I would like to try and recreate in COMSOL. At 0mm from the nozzle (d = 2.4 mm) the velocity is 110 m/s and at 12 mm the velocity is about 100 m/s. It...
View ArticleTracking two phase flow of bubble and moving free surface
Hello - I have a question regarding the use of the Level Set Method for Two Phase flow in COMSOL 4.3? I have included a figure to explain the question. I have a flow domain with two fluids (called...
View ArticleSwirling Flow Around a Rotating Disk
Hi all, first time I've posted here! So I've been working through the Swirling Flow Around a Rotating Disk Model:www.uk.comsol.com/showroom/gallery/616/ It's really impressive. I'm just wondering if it...
View ArticleComsol RF module norm and phase
Dear all, I have a problem with Comsol, a very naive one. I am trying to do a harmonic simulation (a single frequency in frequency domain model) of the EM scattering in a domain. For example if I have...
View Articleparticle deformation througn a contrained channel
Hi there, I am doing COMSOL simulation to see the behavior of a particle flow through a microchannel. There is a area of the channel where particle size is greater than the cross section. So the...
View ArticleHow to generate pulsed laser in Bioheat Eq.
For Bioheat equation, there is one parameter which I can input corresponding to laser source, Q_ext (spatial heat source) In this part, I typed the equation of laser radiation below,...
View ArticleSkull and Electrical Conductance
Hey, I'm just a beginner with Comsol and I'm trying to build a model of a human head that includes a top layer of skull, a brain, and space in between the two filled with some kind of conductive...
View ArticleDuplicate variable name
Hello all, I got some duplicate variable name error when computing my model(see the attachment), which including the piezoelectric device, laminar flow and deformed geometry. Should I use the physics...
View Articleco-efficient of thermal expansion
Hello evrybody, Can anyone help me to know if I can input my co-efficient of thermal expansion as a function of Stress and Temperature or not. And if possible how to do that. Thank you.
View ArticleJava Runtime Environment error
Getting following error, A fatal error has been detected by the Java Runtime Environment: # # SIGSEGV (0xb) at pc=0x0000003da3efbc6c, pid=6909, tid=46912497239488 # # JRE version: 6.0_20-b02 # Java VM:...
View ArticleJoule heating using AC voltage
Can I simulate the following phenomenon in COMSOL 4.1? When AC voltage is applied across a silicon beam, the temperature on the beam will change due to Joule heating and the resulting thermal force...
View ArticleGravity effect
Hi, Sorry for my newbie question. I'm trying to simulate 2D two-phase flow in porous media. I'm wondering whether COMSOL considers gravity effect when applying Two-Phase Darcy's Law physics. Thank you,...
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