Sessile droplet coalescence in Comsol 5.2 with level set method
In my simulation of sessile droplet coalescence with two phase level set method, from the beginning, one drop start coalescence with other drop, no matter how far the drop is placed from other one. It...
View ArticleNon-linear load
Hi everyone, I'm new in software Comsol and I would like to know if is possible to make a non-linear load in this software? And how can I do it? Thank everyone!
View ArticleDestruction modelling
Hello! I simulate an explosion in a steel barrel (Using solid mechanics physics and force per unit volume in all axes for explosion).How can I get information about the fact of the destruction of the...
View Articlepiezoelectric energy harvester
hello all, I am planning to simulate the below figure. I am applying force on one plate, so it will deflect downwards and strikes second one. But when I simulate the figure in comsol , it doesn't shows...
View ArticleUnable to see Moving interface in mathematics module
Hello guys,I want to use level set method in moving interface included in mathematics module and after talking to a technical support they also confirmed that level set is included in my license. But...
View Articlestress boundary conditions in pde
Dear All,How to apply stress boundary condition in a 2D gerneral pde model?Thanks
View ArticleClik here to view.
How to Apply Convection Boundary Condition for Concentrations in Transport of...
Hello,I am trying to apply a diffusive boundary layer as my upper bounary condition in my reaction transport model. My upper boundary should include an external concentration and a gradient.The closest...
View Articlehow to plot the specific value vs time? (heat front vs time)
Hi there,Could you please tell me how to plot the curve of the specific value vs time? Such as the 1D transient heat transfer case (Tinitial=10 deg, Ttop=10 deg, Tbot=-10 deg), if I want to show the...
View ArticleFar field profile of grating
Hello,I am trying to simulate the far field of a grating. In my simulation I am using periodic boundy conditions and a port exitation. When I am cacluting the far feild profile, it seem that it did not...
View ArticleNames of Boundaries
How can the boundaries that there are in COMSOL be named according to their names in the CAD geometry imported from SolidWorks?×Names do not need to be "string", being "number" is enough.
View ArticleUsing output of a study as input in a new study.
Hello,I am trying to run a time dependent CFD problem with a variable flow rate, and obtain the reaction forces on the wall of the lumen. Then I would like to apply these reaction forces in a new time...
View ArticleScaling of heat transfer coefficient with Thickness in 2D heat transfer/fluid...
Hi,I'm modeling heat transfer of a simple cylinder in convective flow in 2d, with a defined volumetric heat source (General Source in W/m^3).If I add a constant heat flux to the outside of the...
View ArticleCorona discharge in COMSOL
Hello guys, I just started to learn COMSOL, and I found a weird thing that makes me confuse a lot. I was trying to simulate the plating on the cathode and checking the corona discharge. First, I made a...
View ArticleRandomize any surface thickness
Hi everyone! I would like to know how I can make rough curve surfaces. To clarify: I started generating a random surface, as explained here, but I want to fit it to a curve surface, such as a sphere...
View ArticlePhase Change in Two-Phase Flow
Dear all,I am trying to solve a two-phase flow problem, where one of the fluids is a gas and the other a polymer melt. Isothermal computation works out of the box without any severe problems.However, I...
View ArticleMovable boundary condition while using stationary study
Dear all,I want to model a process in steady state modling (like etching a sacrificial layer with a constant rate) but the boundary condition (BC) is required to be changed for every steps (imagine a...
View ArticlePhase field with mass transfer
Hi !I'd like to use a phase field model (meaning a potential like Cahn-Hilliard with interface energy) but with mass transfer between the phases. Unfortunately, the Phase field Physics doesn't allow...
View ArticleAdding a Mass Flux to Slope Stability Model
So I am trying to add a mass flux to a model with richards EQN to a model, but it doesnt add the way it should be adding. How do i add a mass flux to a model
View ArticleFlux boundary condition
I recently noticed the flux boundary condition in the new version is different from the old versions. For the flux boundary n.j=j_0 is j in the domain always considered as the diffusive j=-D(grad c) in...
View ArticleJava: Invalid cd root dir error
Hi I'm trying to install Comsol on a Ubuntu 18.04 machine. However when I run:./setup in the installation folder the terminal prints:./setup: line 756: [: /home/joey/Documents/2019-4/Install: binary...
View Article