Implementing amperes law in general form PDE interface
Hi,I'm trying to implement Ampere's law (Curl(B)=j) using the general form PDE interface, but am not having much luck. If someone could describe how to implement the curl operator using this interface,...
View ArticleA Model For Predicting Heat and Moisture Transfer Phenomena during External...
A stable 3D model is implemented in COMSOL Multiphysics® software to simulate temperatures, moisture contents distributions in the external wall Insulation System，and it‘s influence in system’s...
View ArticleLinear wave interaction with floating structure
Hi,I am quite new to COMSOL and has some basic doubts to clear. I need to solve a problem on water wave interaction with a finite floating sheet. I have started with PDE General Form solving Laplace...
View ArticleHow to add material
Hi,I'm using an App to simulate laser flash and i want to add a new material that is not one of those four, but am not having much luck. If someone could describe how to add a new material, that would...
View ArticleCan anyone help me with weak PDE problems?
Hi everyone: I am doing hygroscopic modelling,but I don't understand the equation I input. I use weak PDE physics interface and I defined the dependent variable is p, acting as pressure field. What I...
View ArticleSAW Device Impulse Response in the Time Domain
Hi,I have built a 2D model of a SAW delay line device in the time domain, where I set up a voltage pulse on one set of IDTs, which creates a surface wave that travels across the surface and is detected...
View Articlespinodal decomposition with a Cahn-Hilliard potential and with General Form PDE
Hi !I'm new on Comsol and the Comsol Multiphysics 5.4 my team has doesn't have the physics Moving Interface/Phase Field in the Licence. I'd like to model phase decomposition so I'm using a General Form...
View ArticleLasing condition for vertical laser device
Hi,I am a beginner of Comsol. And I am working on the Tamm plasmon-polariton laser structure. It is basiclly structure has a DBR layers with Ag strip on top. I set imaginary component of refractive...
View ArticleCounter variable
Hello,I would like to create a variable that accumulates or counts the number of times a condition is satisfied. I need the cumulative value as it will also retro-feed the simulation. In other words,...
View ArticleCan particle Tracing for Fluid flow display the 3-D animation of the particle...
Can particle Tracing for Fluid flow display the 3-D animation of the particle motion? It looks like only display the 2-D animation now?
View ArticleHow to keep the fracture aperture constant under initial in-situ stress ?
Hi, I am using the elastic thin layer to simulate the deformation of fractures in geomechanics due to the fluid injection. The application of the initial in-situ stress will result in a reduction in...
View ArticleDiscussion Regarding welding simulation
Hello, I am vignesh pursuving my bachelors degree in the stream if mechanical engineering. As i am a beginner in the comsol multiphysics , I am going to do the simulatipon regarding spot wlelding. I...
View ArticleAdding a layer of Silicon Oxide on top of polysilicon
Hello All,I am new to Comsol, so this may be a dumb question. I am trying to make a thermal actuator using joule heating. I am trying to apply a layer of silicon dioxide on top of polysilicon. I do...
View ArticleEncounter an error when simulating GaN HEMT electrostatic simulation
Dear All, I am new to COMSOL simulation environment.At present, I am facing issue when doing electrostatic simulation of GaN HEMT.Following are the error message getting during computation of...
View Article2D input and output
Hello Since I'm a beginner but want to make a model that might be useful to us, I decided to start in 2D but with proper dimensions. I'm just doing a laminar flow model. I know my pressures, and the...
View ArticleHow to measure a deformation of a cavity inside the piezoelectric 3D object?
Hello!I need to simulate a piezoelectric material with a cavity inside. So I take a 3D block, then I add a cylinder, then I subtract this cylinder from a block. Finally, I have the desired cavity....
View ArticleLinear wave interaction with floating structure
Hi,I am quite new to COMSOL and has some basic doubts to clear. I need to solve a problem on water wave interaction with a finite floating sheet. I have started with PDE General Form solving Laplace...
View Articlesimulation of a resin transfer moulding
Hello everyone, I need to simulate a resin transfer moulding on comsol, do you have any idea? Basically I have this rectangular fiber (maybe we modeled it as porous?) Then 1 inlet with epoxy and...
View Articleparticle tracing
Hello everyone,I'm struggling trying to compute the particle tracing when the particles are submitted by a drag force and magnetophoretic force. I tried to do something like "red blood cell...
View Articlesame model in matlab, but differents results in comsol
Hi, i'm working with heat transfer in a plate of polyamide 12, which heat flux is reached for a laser beam. i am putting my teorical model in matlab, because my goal is obtain the optimal control of...
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