Need a help in 3D geometry !!!!!!!
Hi all, I want to make the head of the tip round with radius around 12 nm. Can any one help me on that..... I attached the file... Thank you,,,
View ArticleFloquet boundary conditions in multilayer structure.
Hi all, I am trying to simulate a multi junction solar cell (for eg: Si/SiO2/Al) and trying to study the electromagnetic behavior of it. For periodic conditions I had used floquet boundary conditions,...
View ArticleInput for inlet of Charged Particle Tracing
Dear Comsol gurus, I'd like to know if there is a technique to read out a file with exact initial positions and velocities for the charged particle tracing. I don't mind using Matlab via the Livelink,...
View ArticleModeling a closed vessel pre-stressed by its internal fluid
Hi, I am trying to model the dynamic deformation of a vessel which contains incompressible fluid (fully encapsulated) under external load. At the initial state, the fluid has internal pressure such...
View ArticleMoving Mesh
Hy I want to check voltage induction in fixed coil from a magnet in a frame and frame is fixed at one end. Whether I should do it by moving mesh functionality or is there anyother way of doing it? And...
View ArticleStop Condition Evaluating Displacement at a Specific Point?
Hello, In a simulation I'm running, I'm measuring the time it takes for a given domain to relax after an initial displacement is induced. The relaxation times for my models vary greatly so my current...
View Articlename of the element
Hello everyone, I am working on a 3D model where each element has a specific permeability value, given in an excel sheet. Does anyone know how I can assign these values to my elements? One...
View ArticleTwo-Phase flow with Fluid Particle Interaction
Hi, I am using Comsol 4.3 to model a two phase flow of immiscible fluids. I would like to add the Particle Tracing for Fluid Flow physics with a Fluid-Particle Interaction to solve for the flow field...
View Articlepropagating electromagnetic wave on a surface
Hi All, I'm wondering if there is a possibility to mimic a surface wave propagating by using a very thin waveguide structure rather than utilizing surface plasmons. For example, can we use a thin...
View ArticleCould anyone can help me to solve the problem about the model building in 3D...
I'm working on the making a model of a capacitive transducer. I focus on the output pressure of the transducer and I worked it out in 2D. I use emi and acpr physics. but I can't work it out using 3D...
View ArticleError - 3D LID Driven Cavity Flow
Hello Forum, i try a computation for the "3D lid-driven cavity flow" model. I got a Comsol Error: Failed to find a solution. Divergence of the linear iterations. Returned solution is not converged. I...
View ArticleRemeshing of Deformed Geometry
There's a deforming part in a geometry with an edge moving downsides and the others hoding their position. After I defined the free deformation part and prescribed the mesh velocity, and run the model....
View Articleline integration of scalar field for use in study, not as result
hello, i am having great difficulty figuring out how to use a line integral inside of a study. for example, i am seeking to use the line integral of a temperature field (1st interface) across a line in...
View ArticlePostprocessing in cyclindrical coordinates
I am doing a plane strain analysis of a pipe with a crack in it. I would like to get the stress components in the cyclindridcal coordinate system (radial, hoop stress) rather than in the cartesian...
View ArticleMicrowave heating model with multiple frequencies
Hi, With the Microwave heating model, with a frequency-transient study is possible to simulate multiple frequencies in a well defined bandwidth? I have a input wave with a fixed bandwidth defined by a...
View ArticleError in the demo model ?
There is a demo example "Thermoelectric_leg.mph" available in the Multiphysics installation and it locates in directory c:\program files\COMSOL\COMSOL43b\demo\builder\thermoelectric_leg.mph". It uses...
View ArticleCUDA and COMSOL
Dear all, I have a new NVIDIA Quadro GPU and I would like to use it to accelerate my simulations, is it possible to use it somehow? I looked for some informations and it seems to me that CUDA it's...
View ArticleChoosing Font Type Via the Preferences Menu
Hello All, I would like to choose a different font type to be displaced in my graphics window. Reading the documentation, the way to do this is to go to preferences->Graphics-> Load System Fonts....
View ArticleProblem to converge a Reaction engineering, Diluted species transport and...
I want to degrade one component in a 3D geometry along with diluted species transport and laminar flow in it. My simulation runs okay in stationary study (i used step function here). But when i want to...
View ArticleC drive going out of memory!!!!
Hi all while I am running a case...my C drive shows out of memory. how can I save the temporary files/recovery files to a drive other than C:? I have tried it by installing the COMSOL in some other...
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