Trouble coupling heat transfer physics for both fluids and solids
Hey all, So I'm getting stuck with my model where I try to couple three different physics. The three physics are: Electric Currents, Heat transfer in Solids, and Heat transfer in Fluids. Basically what...
View Articleloss factor
Hi, Is the loss factor in COMSOl the same with the viscosity factor? I got the viscosity factor of silicon( as in the attachment) . And i want to use thest datas to calculate the Q factor of a MEMS...
View ArticleThermoelectric Effect - Adding the physics
Hello, I'm working in a project on thermoelectric generator. As 'Thermoelectric' physics interface,is not in the physics area/physics list, I was trying to add the physics using the steps given in the...
View Articlecasting of aluminium alloy
Hi, i want to model the fluid flow during casting of al-si alloys. I have solved the model for laminar fluid flow but i cannot distinguish the point at which the alloy solidifies and velocity becomes...
View ArticleShrinkage of hollow sphere
Hi, I'm working on diffusion of a hollow sphere (axisymmetric 2D). I have set up the problem for constant external radius and I moved on to the ALE method of simulating the shrinkage of the external...
View ArticleHIgher order derivatives of solved variables
I was wondering if someone could help me with an issue I am having in the "Magnetic Fields (mf)" module. As a test, I am doing a very simple simulation that calculates the field for a given external...
View ArticleFailed to Evaluate Jacobian Variable
Dear COMSOL users, I am trying to model the electromagnetic heating stimulation for heavy oil reservoir (2D radial) to be further studied for my bachelor's degree thesis. The model is very simple. I am...
View ArticleDisplacement Field
Hey: I would like to know what is the difference between Displacement field and Displacement gradient. I developed a poroelastic model to simulate a reservoir in the soil.
View ArticleCenter of mass (X,Y,Z coordinates) for complicated domain but with isotropic...
Background: I am modeling an elbow joint and I need to scale two bones equally so they almost touch. Problem: If I am not mistaken, there is no offset surface command in COMSOL. However, the "scale"...
View ArticleCan particle inlet surface also act as bouncing walls?
In the particle tracing module, it seems to me that whenever I select a surface as a particle inlet, that surface will be excluded from (or override) wall boundary that can bounce/freeze..etc....
View ArticleComsol's capability on modeling atomic oxygen ionization and movement control
Dear all, I am considering a dielectric barrier discharge (DBD) particle control problem in the space environment. I read a Comsol paper on modeling the DBD flow control in the atmosphere, and I wonder...
View ArticleProblem in Coupling thermal-electrical-mechanical model
Hello everyone! I'm trying to develop a thermal-electrical-mechanical model using Joule's heating and solid mechanics module. Now the problem is that both the joule's heating module and the solid...
View Articleis this possible in comsol?
Hi all, I trying to solve simple element killing problem. i found ansys tutorial for element killing. please find the attachment, is this possible in comsol? Genius please give me your valuable comments.
View ArticlePressure Drop in a Muffler
Hello I need to calculate Pressure Drop in a Muffler (3D), i tried to use the Discharging Tank model that uses the Pipe Flow Module, but it seems i can't use a pipe within a pipe (trying to simulate...
View Articlemoving pulsed laser
sir, I have to simulate for a moving pulsed laser in a circular path so please give me idea how can I start it.
View ArticleMEF+CIR FrequencyDomain No solution. Model problem?
Hi, I am trying to combine Spice with MEF to simulate parallel resistors on a PCB at higher frequency where skineffect changes the behavior of the copper. The model solves correctly for low frequencies...
View ArticleProblem on Linux....
Hi, I have a problem, when I try to install Comsol 4.0a on Ubuntu. When I run this comand : francesco@ubuntu:/media/FRaNK/PROVA/COMSOL40a$ sh setup setup: 497:...
View ArticleLivelink AutoCAD
Hi, i have Comsol 4.2 and Autocad 2010. I tried to connect them via livelink, but comsol shows me all the time: "Failed to connect to AutoCAD. Please make sure AutoCAD is running." I cannot find a way...
View ArticleCOMSOL on Private Cloud
Hi, I have been trying to deploy COMSOL on the top of my private cloud. Can any one help me in moving COMSOL to the cloud? Thanks!
View ArticleNumerical Simulation of Magnetorheological Fluid in Magnetic Field
It is known that magnetorheological fluid presents controllable yield stress under external magnetic field. I want to know whether the yield stress shown by magnetorheological fluid under magnetic...
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