Forced convection - horizontal flow against a plane sheet with a blunt edge
Hi folks, that's my first time I'm working with COMSOL MULTIPHYSICS and I'm trying to simulate a horizontal flow against a plane sheet with a blunt edge. I use convective and conductive (cc) and...
View ArticleQuantifying the force due to electrostatic pressure via the maxwell stress...
I hope this is a easy question to answer because I know there must be a way to obtain the numerical output for the forces created by electrostatic fields. I have produced an ES model with similar...
View ArticleFluid Flow between small pipe and large tank
This may be a simple question: I have a small vertical pipe with an inlet at the bottom (inlet velocity =~10m/s). The pipe is connected to a larger tank at the top. The outlet is set to be at the top...
View Article2 Parameter Sweep Causing Problems
I'm trying to do a parametric sweep over 2 parameters and plotting the result. I'm trying trying to calculate the eigenfrequencies of a simple structure as a function of 2 parameters. I can accomplish...
View Article3D Boundary mode analysis for plasmonic waveguide
Greetings. I have a plasmonic waveguide - a silver brick on silicon substrate with glass cladding. I would like to know the modes which this waveguide supports. First I have made a 2D mode analysis and...
View Articlehow to simulate the breakdown voltage in COMSOL?
hi, how could I use COMSOL to calculate the breakdown voltage in the dielectric?
View ArticleFluid flow into atmosphere
Everyone, I am still relatively new to this program. I have attached an example model to help explain what I am trying to do: I have the annulus of a vertical pipe with air flowing from the inlet at...
View ArticleMeshing 2-D and 3-D geometries with matching meshes
Hi! I have a very expensive 3-D electro-chemistry problem which I am trying to simplify. The problem has fluid flow and electro-chemistry (tertiary current distribution) equations in it. I would like...
View Article3D or 2D simulation of a drop on a silicone surface
Hello Everyone, I am new to comsol and I need to simulate a a water drop on a silicone surface. This water drop was placed on the silicone surface and i am required to find the force that will make the...
View ArticleSimulate Fields Outside of Semiconductor Device
Is it possible to simulate the electric fields outside a solid-state device (such as a PN junction)? In other words, I'd like to create a boundary outside the device representing air and solve...
View ArticleEigenfrequencies of a spring WITH Gravity
In the real world, I have a flat steel beam that is acting as a spring. It starts out curved into a semicircular shape, and then it is loaded with a hanging weight that brings it down flat. I want to...
View ArticleMagnetic field of permanent magnet
Hi, I'm trying to create a cylindrical neodymium magnet and visualize the magnetic field generated by the magnet on a normal plane. Anybody knows how to do this? Later on I intended to visualize the...
View ArticleCoupling plate and acoustics
Hi everyone, I'm trying to model a axisymmetric disk in 2D which is actuated with 40kHz in the middle in axial direction which gives a pressure wave in the surrounding air. The air is represented by an...
View ArticleConvergence problem with Open Boundary condition - No viscous stress
Hi, I'm modeling fluid flow through a 2D porous media using Darcy's Law. I intend to estimate fluid flux values across the top boundary of model, however,my desired outputs will be one in which the...
View ArticleDifferent results of Simulation from Solid Mechanics and shell
Hello, I have a problem when doing a simulation with a bend pipe meshed by shell element. The results of principal strains are one time larger than meshed by solid mechanics. But the results of...
View ArticlePDE
I am currently working on COMSOL 4.0a. Can anybody tell me how the variables for stress are defined in COMSOL? Since I want to define a Coefficient PDE, which its diffusion coefficient (c) is coupled...
View ArticleLivelink to MATLAB
Hi everyone I am doing research on obtaining absorptivity of the surfaces using RF Module. I am using Livelink to MATLAB interface. I tried two version of COMSOL with MATLAB 4.2a and 4.3a. At each time...
View ArticleTime dependent study on a 3D multiturn coil inside of an electrical circuit
Hello, I am trying to model the voltage in function of time across a 3D multiturn coil inside of an electrical circuit. To do this I use the Magnetic Fields and the Electrical Circuit physics and a...
View ArticleFluid Structure Interaction module - Water Hammer?
Hello, Can the Fluid Structure Interaction module of COMSOL ver 4.2 be used to solve a water hammer problem? Or, is the Pipe Flow Module necessary?
View ArticleIsothermal contour normal vectors
Hi All, Background: I am mapping the temperature gradients at the solidification front of a laser generated melt pool. However the gradients need to be measured in the direction normal to the...
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