thermal BC's across the interanl surface between the heat sink and air in the...
n Model Library : Heat transfer module : Tutorial models: heat sink . It is considered the temperature filed is continuous across the internal surface between the heat sink and the air channel. first...
View ArticleTime Dependent Study of an Airfoil- Lift Coefficient
Hi, I am trying to learn how to calculation the lift and drag coefficient of an airfoil running a time-dependent study. Below are the boundary conditions. Re ~2000 Inlet- Inlet U*step1(t[1/s]) Top and...
View ArticleRF: Emitting planar light from PORT (3D)
Hello my friends. I am trying to construct a model where the port is placed along the y,z-axis and emits light in the x-direction. However, I do not want to just emit light normal to port's surface, ie...
View ArticleThermal expansion model
I built a thermal expansion model, at temperature 700K. I want to examine the stress distritubion of the cross-section inside the expanded sample, how do I do that? Also, is there a way to visualize...
View ArticleElectrostatics using deformed result of solid mechanics
Hi, I am new to COMSOL, using version 4.1 to simulate a flexible capacitor. The goal is to have the geometry deformed using a Solid Mechanics simulation (which I have done) then simulate the behaviour...
View ArticlePlasticity - Cyclic Hardening
Hi all, I am modelling a process where a steel plate is subject to cyclic forces that cause plastic deformation. As the process is cyclic I am inclined to use the kinematic hardening option - I am...
View ArticleWall condition (no slip or sliding), fluid outlet condition
Hi all, I am modeling a sphere moving in a moving laminar fluid domain (2D). The sphere is moved by the motion of the fluid, through boundary load on the sphere surface. I am wondering what kind of...
View ArticleCorona discharge, Plasma module
Hi everyone What I'm trying to do right now is to simulate corona discharge with "DC discharge" branch of the plasma module. There are these two boundary conditions called "Electron outlet" and...
View ArticleDrag Calculation in Ahmed Body tutorial
Greetings Folks, I was going through the ahmed body tutorial. Turbulen k-e model has been used to solve the problem. In the tutorial pdf, drag coefficient value from simulation has been compared with...
View ArticleDrag Calculation in Ahmed Body tutorial
Greetings Folks, I was going through the ahmed body tutorial. Turbulen k-e model has been used to solve the problem. In the tutorial pdf, drag coefficient value from simulation has been compared with...
View ArticlePD in insulation
Hello I want model the partial discharge (PD) in insulation , my geometry is insulation( rectangular) between two electrode with one void inside the insulation. I want model PD inside the void. or...
View ArticleLaminar inflow into a turbulent domain
I have a 3D geometry in which turbulent flow develops downstream, but the inlet to the domain is a pipe that has laminar inflow. The turbulence physics interfaces do not have a laminar inflow boundary...
View ArticlePlot of a line between two points in 3D
Hello, I need to plot a line that describe the electric field between two points in 3D. I tried the way I used to try in 2 D but obviously it didn't work as I wanted. It didn't give me the plot I...
View ArticleHow to calculate a value between two points?
Hello, I have modelled a simple 2D electric potential plot of a dielectric between two plates with a void in the middle. I want to know the voltage between across the void. I can get the plots on...
View ArticleCut Point 3D Point Evaluation
Hi there I am trying to obtain data for a point on my model that is not directly defined within the geometry. I have used the "Cut Point 3D" to add a point on my model, then I was going to use the...
View ArticleHow to simulate the water boiling by Level-Set method
There is a good example simulating water boiling by phase field. I am trying to use the Level-Set method. However, I was frustrated by many times of failure. My problem is how to deal with the...
View Articlecoupling Electric Currents and Magnetic Fields
Hi everyone! If a model consists of both electric currents (or electrostatics) and magnetic fields separately (not using MEF), how do you couple them to make possible the magnetic fields can be...
View ArticleFluid flow channel in cantilever beam
Hello, My model is the following: a cantilever beam has one longitudinal channel containing a fluid flow. My goal is to find the effects of the fluid flow (viscosity, velocity, size of the channel) on...
View ArticleCahn Hilliard type Equation not converging in COMSOL General PDE module
i Have been trying to run this model is COMSOL. I am using the PDE module to solve the problem.I keep geting this error Failed to find consistent intial values. Last time step is not converged....
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