Expression for incident magnetic field
Hello,I am simulating a resonator where I use a port condition to send in an incident wave, specificied with initial electric field amplitude. From my results, I want to obtain the z component of the...
View Article2D shallow water equations
Hello. I'm having a difficulty in modeling 2D shallow water in COMSOL to model a river flow. All I could not understand is how we could identify boundary conditions and how to implement them in COMSOL....
View ArticleFrictional heat generation
Hello, I recently encountered a problem about frictional heat generation. The model I created was generated by pressing an object on another object in the structural mechanics module and then...
View ArticleReaction Kinetics in Hydrogen Storage system
The below post is related to an archived discussionHello Guys, I am new to COMSOL . I needed to include a "mass source" in Darcy law model and "heat source" in heat transfer in porous media model.The...
View ArticleUse transient solution as initial value for another transient simulation
Hi!What I want to do: A transient Heat Transfer model where there is a new component added at a specific time, let's say t=180 s. The simulation then continues to end time. Temperature boundary...
View Articlehow to inherit the previous deformed geometry and stress.
Hi, In comsol software, after re-meshing the deformed mesh, there is no residual stress in the deformed geometry. How can we inherit the previous deformation and stress? Thank you very much.
View ArticlePhase 2 appears from nothing in Microfluidics module
Hello!I'm working with the microfluidics module for a droplet generation problem. After some time working on this, I got these results (in annex). Both files are volume fraction of phase 1 plots. The...
View ArticleSetting default camera position in 3D view
Is it possible to update the default camera position values from the graphics window? Rather than manually enter the position and other values for the camera, I'd like to position my geometry in the...
View ArticleMomentum
Dear Sir/ma'am Can we simulate the motion of an electron/proton in an electric field and determine the change in their momentum. Which module we should use?
View ArticleLaser-Ultrasonic simulation
Hi everybody,I have the same question with this discussion: https://www.comsol.kr/…/pressure-wave-generation-due-to-the…It's about laser-ultrasonics simulation, the first phenomenon is laser heating is...
View ArticlePort Impedance + Impedance Matrix
Hello,I am trying to find out the impedance matrix of a 2-Port-RF Device through a numerical simulation in Comsol. For this I had defined a 50 Ohm Port on each side.Since the simulation did not match...
View Articlecurrent calculation using equation in comsol without ac/dc module
J=q(Dn*dn/dx+sigma*E) is correct?
View ArticleFlow in inclined pipe
I want to model laminar, Newtonian fluid flow in an inclined pipe w.r.t. gravity. The inclination angle is 30 degree. How should I define the flow? When i enter my average velocity and average pressure...
View ArticleModelling Ferromagnetic Materials
Hello,I'm a just a recent user of COMSOL and still trying to get my head around some of its features, but learning slowly but surely. I have been trying to model induction heating of ferromagnetic...
View Articleprinter problem
I have both a Canon printer and a hp printer. My Canon printer was connected with my computer earlier. So when I tried to connect my hp printer, I faced an error which occurred at that time. I learned...
View ArticleSet initial velocity in a droplet-substrate impingement problem using level...
The below post is related to an archived discussionAsking a similar question as the archived discussion above. How to set the initial velocity (actual velocity at t=0) of a liquid droplet (fluid 1)...
View Articlehow to add attenuating medium in Pressure Acoustic, Transient physics?
I want to see the acoustic radiation force induced in a fluid by a focused ultrasound beam, which caused when there is an attenuation medium.I can do so for a linear solution with Pressure Acoustics,...
View ArticleHow to get the derivative of a specific coordinate point?
I defined a piecewise function VFUNC as a variable. When calculating this function, I need to use the derivative of the specific coordinate X0 (the piecewise position). How should this specific point...
View Articlefor designing generator
Hello I want to design the generator and wnat the effect of the load cuurent on the generator. How the effect can be incorporated.From Mohit Bhola
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