Wall 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 Articledesign and analysis of 2d single axis capacitive accelerometer
hi, I have designed 2d single axis capacitive comb drive accelerometer, i am getting the same deformation for the different g-forces but displacement value is changing. help option present in comsol...
View Articleinsulated electrode solution interface, assistance requested.
Hello, I'm a beginner with COMSOL and appreciate any guidance that could assist me learn more about this powerful tool. I have a question about modeling the voltage drop across the electrode-solution...
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 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....
View ArticleMaxwell Stress Tensor
Hello all, I'm new to Comsol and Im having a little difficulty getting my head around how the Maxwell Stress Tensor operates. I understand its operation when applied to parallel wires (Like in the...
View ArticleMake my model infinite at one direction
In order to make my block having an infinite length in x-direction (as it is a stripe of graphene and extends along its length to infinity) Should I use some specific Boundary Condition??
View ArticleSettings for simulating static or rf field between metallic contacts
Hi, I'm a new Comsol user and I'm interested to simulate the 2d field between two electrodes on a substrate. The electrodes can work at low but also at high frequencies. I've been able to draw the...
View ArticleFlow in a pipe with a very large aspect ratio
I'm trying to solve what should be a very simple problem as part of a larger project I'm working on. It's just laminar flow in a pipe of length 14,000 feet and radius 0.04 feet. I'm just trying to find...
View ArticleMessage:
What does this message mean: Parametric solver does not support geometry and mesh dependent parameters? It solved me things but not sure if it is correct.
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