Simulation of leakage flux from transformer
Hello. I've tried to simulate a quantity of leakage flux from transformer by using COMSOL 4.3a. To do this, I made a simple transformer model with LiveLink for AutoCAD.(I want to attach mph file, but...
View ArticleSessile droplet
I want to put a sessile droplet inside a channel. How to create a droplet of a specific material ? and how do I choose the model ? As a reference I was wondering about the model in one the Paper - A...
View Article2D magnetic field streamline plot from cut plane
Hi, I have a question on the streamline plot. I have build the 3D emf model on 6 parallel bar with the same current density. bar cross section was in YZ plane The 3D streamline could be clearly seen....
View Articlemesh
Hi , I am trying to see the accuracy of the numerical solution with different meshes and I am using analytical solution for comparison. As long as the mesh is refined the numerical model is more...
View Articlehow to define Heat source?
Hi, I use COMSOL to simulate a microheater to heat the polymer waveguide on Silicon substrate. The model is 2D. Silicon substrate serve as the heat sink at 25 degrees. When I set the microheater to 300...
View ArticleParametric Sweep in order to change the location of a point
Hi, I'm using the Parametric Sweep in order to change the location of a point who separate edge into two lengths; each has a different boundary condition. (One defined by me and the other one is the...
View Articlegeometry problems
Hi all, My question is, if you build up a block first, then you build up a sphere inside the block. Is it means that the volume which was belonged to the block is taken by the sphere? If so, is it...
View ArticleElectric Fields - Insulated Electrodes
Hi all, I am trying to simulate electric field around insulated electrodes and placed inside a cylinder containing dielectric material. Could someone help me setup the model correctly ? I am trying to...
View ArticleLoad materials from library with Java API
Hello COMSOL aficianados, We are working with the Java API for COMSOL here. Let's say you want to load the material copper into your model. It seems, according to the manual, that the only way to get...
View ArticleRichard's Equation questions
Hi, I'm trying to use COMSOL to model water infiltration and evaporation in porous media. Few questions in this issue: 1) How do I define a boundary as open boundary for Evaporation. How do I define...
View ArticleGlobal constraint
Hi, I am modelling thermodiffusion of moisture with the mathematical module. Is it possible impose a constraint to the concentration, c, in order to ensure it stays positive.
View ArticleAssigning material properties to an interior volume
I want to assign the empty volume within a closed container to be a fluid and assign material propertied to this fluid. I imported a closed 3D model that is made up of a number of solid parts contained...
View Articlehow to simulate a permanent magnet with vertical movement toward a coil ?
Hello everybody, i want to simulate a permanent magnet with vertical movement toward a coil i've used magnetostatics and moving mesh in comsol 3.5 i defined a constant Br(remanent flux) and a...
View ArticleBC in assembly mode
hello, idk but i am getting an error in running the simulation. I am getting a warning saying: "MUMPS allocation factor increased to 1.44". What does it mean? is it due to the insufficient BC? I am...
View ArticleDifficulties with #985 Peristaltic Pump Model
Hi All (bear with me; I'm new) Working my way through the peristaltic pump tutorial and all has been a-okay thus far but once I get to the plot of the total volume (bottom of pg. 14) when I try to...
View ArticleHow to see the plots after running in batch mode?
Hello! I managed to get comsol to run in batch mode (Linux). However, after I open my newly created output model file out.mph, I do not see any graphs available. I am solely interested in CFD module,...
View Articleparticle deformation througn a contrained channel
Hi there, I am doing COMSOL simulation to see the behavior of a particle flow through a microchannel. There is a area of the channel where particle size is greater than the cross section. So the...
View ArticleExternal U vs. I
Hello, I'm quite new to COMSOL. I generally have doubts where to use external U vs. I or external I vs. U when I want to insert my designed model into a circuit. I think in any of those cases I have to...
View Articlehill plasticity
Hi, Trying to make hill plasticity non-symmetric so my question is; is it possible with different yield stress level in tension and compression. Then in addition the plastic stage is confusion. How are...
View ArticleParameter studies.
Hi I am trying to do parameter studies of the device and find the design variable that is important. In order to do, I am simulating 5 cases at one time, but I guess this makes the computer go crazy....
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