Change of a lens' focal point with wavelength. Refractive index wavelength...
Hello Everyone,I was using a Comsol example for the focusing lens:https://www.comsol.com/model/focusing-lens-57621I made no changes to the model. The focal length of the lens is set to be 1000...
View Articlemodeling the influence of roughness on impedance response of rectangular...
Hi all, I am beginer for studying Comsol. I am modeling the influence of roughness on impedance response of rectangular electrode and using AC/DC module in Comsol now. I really do not know how can I...
View ArticleVacuum evaporation
Hi, Is there any way to simulate how fast a cup of water is evaporating under low pressure (boiling)? I mean mailny the speed of mass change.
View ArticleSetting surface to ground
Hello! I am totally new to COMSOL so I am sorry if this is really silly. I have a basic geometry (created in Inventor) with a cylinder which has a bifurcation at a point and right before the...
View ArticleIs there a MPC functionality in COMSOL?
My problem is to simulate two beams connected at an included angle. The diagram is shown below.The first beam is hinged on the ground, and the rotation is restrainted by a rotation spring with...
View ArticleHow to set up a circularly polarized light source
I'm going to set up a circularly polarized light source in the 2-d model. Now I'm using the boundary condition of the port, but I don't know how to set it.So I hope to get your help
View ArticleLaplace equation, Potential Flow, Air/Hydrofoil, Kutta Condition, Lift/Drag
Dear fellow COMSOL users,I'm using Laplace equation solver to get the potential flow(ideal flow) around a 3D air/hydro foil.The inlet and outlet BCs are set correct, which I cross checked with...
View Articleheat penetration in microwave oven domain through waveguide
The below post is related to an archived discussion[start here]sir, As I am done with modelling for basic model (heating of water), i came across two problem 1. the study part showing no output as...
View Articlesolid mechanics weird results
Hi,I am simulating a piezoelectric device. I am experiencing difficulty in understanding the stress result of the structure. The bottom layer has zero displacement boundary condition, however I see a...
View Articledisplay the graph for a specific volume
Hello,I made the mechanical simulation for a large volume (eg. 0<X<760, 0<Y<760, and 0<Z<80). But I want to general a 3D graph to show the mechanical deformation (strain) for a...
View ArticleLaser cavitation
Hello ereryone, I am leaning the COMSOL to simulate laser cavitation, unfortunatly, I can not simulate the expansion and collase of bubble. Anyone have the related experience of bubble simulation?Or...
View ArticleInternal error callback
Hi therewhen I run same case 5 times, maybe 3 times of them failed the error was** internal error callback**. It seems that COMSOL is unstable. It's not always worked or failed.Any help will be...
View ArticleSolid-beam weld joint
I screwed up the Comsol versioning on my previous post so I want to ask my question again, in proper context. I use Comsol 5.2a, I have a simple need to weld one end of a beam to a rigid domain. All I...
View ArticleHow to draw an arc with fixed radius and across two points in MATLAB livelink...
Hi,I am using matlab livelink to draw a geometry. Does anyone know if there any commad to draw an arc with a specific radius and across two points?Thanks!
View ArticleOpening/Accessing methods saved in the MPH file outside of the Application...
Hi, we created an App from MPH file under Windows (Application Builder is only available in Windows). This MPH file was then slightly edited under Linux, but the functionality of the App should not be...
View Articlehow to know the meaning of phrase like ewfd.nxx or ewfd.kixx used as part of...
Hi, I find many phrases like ewfd.nxx and ewfd.kixx were used as part of expression for variables and it is hard to konw what these mean.Is there any files to search or anyway to know ? Thanks.
View ArticleHexagon spiralled channel
Hi,I need to model a hexagon spiralled channel in a similar fashion of a circular one, which is taught here: https://www.comsol.com/blogs/how-to-build-a-parameterized-archimedean-spiral-geometry/Would...
View ArticleProblem in the creeping flow model: does not work in one case but works in a...
Hi, I'm having a problem with comsol : I do not know if it come from a ill-posed physic or if it's a "numerical problem". Indeed, I use the creeping flow model on a rectangle with an inlet (p = 1) to...
View ArticleBalanced and Unbalanced Signals
Hello,I would like to study on baluns by using COMSOL. I need to convert between a balanced signal and an unbalanced signal. I had assumed that the coaxial lumped port is unbalanced. But after I did...
View ArticlePeriodic Boundary condition in a multiphysics.
Hello everyone,I am new to COMSOL, and I was in a confusion about the boundary conditions applied to the multiphysics. I am working on a piezoelectric model and want to apply periodic BC to the model....
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