Line maximum: tabulating data
I need to take a series of line maximums (for Temperature, say) from a regular array of parallel lines which are perpendicular to the y-z plane and pass through a bounding box in 3D space. The line...
View ArticleHow to change equation during a transient solution in V4.3
Hello everybody, I am simulating a transient solution by using transport of dilute species. I would like to change the equation during a transient solution and use the initial value of simulation 2...
View ArticleChange coordinate axis label
Hi Guys, Does anyone know how to change the coordinate axes labels in COMSOL 4.3? As we know, if we have a 3-D model and click 'Default 3-D view', we can observe that X axis is in the upper right...
View ArticleThermal Conductivity as a function of temperature
Hi all, I am trying to include thermal conductivity as a function of temperature in my model but its giving me error 'inconsistent unit'..let us say the function is -1.27E-9*(T)^3+8.09E-6*(T)^2-...
View Articlecannot 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 ArticleTime dependant signal at inlet
Hi all! I am trying to implement a time-dependant inlet velocity. What does 'location' mean and what unit is associated with this variable? Is it time or length? If length, is it meter of millimeter?...
View ArticleProjection of an Isosurface onto a plane or boundary
Hello Another visualization question: Is it possible to plot the projection of an Isosurface in 3D space onto a 2D surface or plane (such as the x-y plane). Thanks in advance Dan
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 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 ArticleCOMSOL Releases COMSOL Multiphysics version 4.3a
We at COMSOL are proud to introduce version 4.3a of COMSOL Multiphysics to the COMSOL community See: www.comsol.com/products/4.3a/ This introduces: * LiveLink™ for Excel® * LiveLink™ for Solid Edge® *...
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 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 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
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