cannot select an edge to become an outlet boundary
Hi! After struggling for quite a while with 4.2a, I haven't been able to enable one edge to become an outlet. What I did was to construct two objects: the first one is a sequence of lines, which I then...
View ArticleDefining wires in 3d models
I am trying to simulate a process that includes flow, electrostatics and mass conservation. The model is simply a rectangular. One edge is grounded and the opposite includes 59 wires. The grounded edge...
View Articlevolume within a closed isosurface
Hello WIthin a 3D domain containing closed isosurfaces, is there a way to calculate the volume of material contained within each isosurface? Many thanks Dan
View ArticleElectric Field Simulation Problem
Hi, I am trying to create a plot of electric field, but i failed to do it. I created a simple model of column, and I used the physics of "Magnetic and Electric Fields". I defined a electrical potential...
View ArticleNeed help: Error whenever trying to simulate periodic boundary condition in...
Hi Everybody, I'm trying to do 3D RF module simulation with periodic boundary condition on the sides. Every time i start the computation, i keep getting an error that says : Unknown function or...
View ArticleComplex permittivity in electric currents physics
This seems like a simple question but I can't find a clear answer in the documentation. I wish to solve for the electric field induced by a conductive particle surrounded by an insulating membrane in...
View ArticleCAD import file boundary conditions
I have a 2D model I've imported from CAD that consists of many interlinked hexagons making up a larger hexagon (like a big hexagon with smaller hexagon-shaped holes throughout). I'm trying to do a...
View ArticleTemperature mapping with Model Coupling
I wish to generate temperatures in a model and subsequently map the temperatures them to a similar model in a different study. The two models will have the same geometry. However, the model will be...
View ArticleExtract voltage with lumped port?
Total COMSOL newbie here, please be gentle :-) After some struggle and a lot of looking at the model library, I managed to set up a simple 2D model of a plane wave incident on a pair of metal strips...
View ArticleHeat continuity
Good afternoon! I need an advice about how to use the heat continuity option please. The task is to describe the following situation: in my model, there are some details that are physically not in...
View ArticleComputing physic in dependence of another physic
Does anybody know, if there's a model in the model gallery, where you compute a pyhsic in dependence of another physic?
View ArticleModal damping ratio
Hello all, Anyone knows how can I calculate modal damping ratio for a rotor if I have access to eigenvalue? Thank you, Br, Hessam
View ArticleGeometry
Hello!!!!!! I'm trying to do heat transfer + joule heating between two rectangles. But when I do the geometry I have two rectangles together (2 domains) 1 domain is the joule heating, and I have a...
View ArticleEvaluate the electrical voltage from the magnetic field (mf) physic
Hi ! I need to calculate the electrical voltage of an electric conductor subdued to a magnetic field. The conductor is excited by a current density using magnetic field physic (mf). I want to simulate...
View Articlestudy
Sir, In frequency domain study, in stationary solver there are options like automatic, linear, linearized and non'linear which is to be shown. Is there any need to change the relative tolerance value
View ArticleAxial flux permanent magnet generator
Hi Dr. Ivar/All, Iam trying to simulate the axial flux permanent magnet generator with two rotor and a coreless stator sandwiched between two rotor. Permanent Magnets are attached on inner surface of...
View ArticleLaminated core
Hello everyone, I’m interested in simulating the induction heating of an object that occurs with the help of a rectangular coil that is placed above it. The problem that I’m facing is that I want to...
View Articlesinusoidal voltage to time dependent solver
I am trying to apply sinusoidal voltage to a model with time dependent solver. I apply the voltage based on a function but it doesn't show anything. the model is attached. thanks
View Articleconstraining the range of dependent variables
Hello, I have implemented an axisymmetric drift-diffusion equation using the equation-based modeling interface in COMSOL 4.3 (incorporating the necessary terms due to the curvilinear coordinates). I...
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