Particle Field Interaction
Hi, I have been trying to use the particle tracing module in COMSOL and I have been able to trace particles with electric and magnetic fields. As I am putting in milli amps of current and I want to...
View ArticleTransducer like perturbations applied at one end of a chain of steel balls...
I am trying to simulate a piezoelectric transducer used as an actuator to perturb a chain of steel balls in a copper pipe in contact with a second transducer at the other end. I am trying to simulate...
View ArticleExternal radiation source- solar radiation
Greetings! I have a final project where I should measure maximum solar radiation heat flux during a day on re-radiating surface (i.e mirror) towards a window. My object finally is to to find an optimum...
View ArticleFlouquet periodicity on Eigenfrequency analysis 3D
Hi everyone! I'm trying to obtain dispersion curves for a 2D periodic structure in 3D. Already build the geometry (basically a ball inside a box), assigned the materials, and set the Flouquet...
View Articlecomsol 3.5 Capacitance and permittivity calculation
Hello everyone, I 'm new to comsol and I've been trying to model a simple parallel plate capacitor with a mixture as dielectric. I wish to obtain the effective permittivity value of the mixture. Since...
View Articlesolver sequences
Hi, I am simulating fluid flow and heat transfer in a cylindrical pipe. what i need is a very long term simulation (i.e., 25 years) and I am using pipe flow module which assumes the pipe and 1D and the...
View ArticleTemperature distribution within a cable's cross-section
I want to simulate the temperature distribution within a cable's cross-section. Three phase currents with 120 phase shift are applied to this cable. The physics i use is heat transfer in solid, I add...
View ArticleNo-slip on interior boundary
I like to solve (Comsol 4.1) Navier-Stokes (incompressible) in a 2D-domain that has an interior boundary (typically a line starting at some point on the exterior boundary and ending at some point...
View ArticleSlip and No Slip
What is the difference between slip and no slip options in the boundary conditions of laminar flow. which will be a suitable option to choose for blood flow in capillaries.
View Articlehorizontal stress only shows in the top layer
hi i'm simulating a road using the elastic model. the road has 3 layers (asphalt, foundation, soil) with different moduli. when I apply the loads of the wheels, I can clearly see how the vertical...
View ArticleHelp me! Error"Internal error in boundary respecting."
Hi, all I want fix it, It is coordinate (-2,06378, 1,35209, 2,8034) Thank a lot Vinh Nguyen
View Articlewireless power transmission simulation help.
I am very new in using comsol and have a little knowledge about comsol.I want to simulate wireless power system using comsol 4.3b.If someone give me some direction about how to simulate wireless power...
View Articledraw a hollow ( half radius) cylinder
I would like to draw a hollow ( half radius) cylinder with inner radius 12mm, outer radius 25mm with length 1m. I am using COMSOL 3.5a Can you tell me how is draw hollow hollow ( half radius) cylinder?...
View ArticleChanging parameter during time-dependent study with MATLAB (Does not work at...
Hello, I have a script running using MATLAB livelink. It is a time-dependent study and I would like to change the parameters defined at specific time during the study. I have managed to make this work...
View ArticleCoefficient Form PDE Coupling
Hi, I am using the Coefficient Form PDE module to simulate a material under an applied voltage. I set two Dirichlet boundary conditions for my voltage on either side of the material (imagine a single...
View Articledp/dx and dp/dy in Comsol
Hello, I am working with a N.S equation. Does anybody know that p in N.S equation is static pressure or not? How can I find out that dp/dx=0 or dp/dy=0 in my simulation? Comsol bring out p as a...
View ArticleCOMSOL 4.0 - Linear Extrusion
After learning version 3.5a, I was forced to jump into version 4.0 and have not had a good experience with the "upgrade." Making a linear extrusion from a 1D geometry to a 2D geometry in 3.5a was...
View ArticleVery simple semiconductor simulation
Hi! I'm trying to learn Comsol, but it seems have run into a wall. I've looked thoroughly through the semiconductor_diode model as well as the MOSFET model (in the showroom). However, as I implement...
View ArticleFree and porous media flow 3D simulation - convergence issues
hey all, I was using the free and porous media flow module (fp) to understand flow distribution patterns in my system. in the 2-D form it was working pretty neat. When I scaled it up to a 3D problem,...
View ArticleAC/DC rmm module - bug report
In the 2D generator tutorial, I changed the prescribed rotational velocity from 'rpm' to 'rpm*tri1(t[1/s])'. tri is a triangle function. Therefore the rotation speed should first increase, then...
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