Clik here to view.
modeling a 3d electromagnet in a stationary study
Hey i am having som trouble. it is giving me this error: and i can't figure out why! i tried to use and modify the "Multi_Turn Coil Winding around a Rectangular Ferromagnet cleared.mph" to help me make...
View ArticleClik here to view.
Large Virtual Memory after Derived Value Calculation
Hello, I've recently been calculating some surface integrals over a wide range of parameters. I have successfully run a parametric solution with 21x4 parameter combinations, and now I'm trying to...
View ArticleClik here to view.
COMSOL JAVA API to Control Camera
Hi, I am using COMSOL 4.4 JAVA API to export a series of group plots images. However, the model is ugly aligned in the output image. I am wondering is there any way to control the camera attributions...
View ArticleClik here to view.
Problems with STEP FUNCTION
Hi everybody, I have an inlet in a water reactor working in the following way: 10 s on, 80 s off, 10 s on, 80 s off.... -Fist of all, I have built a PIECEWISE (pw1) function (0<t<10 = 1,...
View ArticleClik here to view.
Eigen Frequency simulation results does not compare well with frequency...
Hi All, I am facing a problem with my simulation and was wondering whether I am doing something wrong or this is normal. I came up with my design and carried out Eigen frequency response for the first...
View ArticleClik here to view.
Using exact time from Event Interface
Hi everyone, I am wondering that How can I extract value of time from Event interface during Time-Dependent Solver to use for another purpose? For example, I use Event Interface to set up an expression...
View ArticleClik here to view.
What is solid.pm exactly in Comsol Solid Mechanics?
I know it is Pressure but what is the difference between this one and stress or Piola stress? I could not find it in the manual!
View ArticleClik here to view.
errror: mass matrix is zero
When I try to run the attached script which solves an eigenvalue equation with different parameters, I get the error: mass matrix is zero. Does anyone know why this happens?
View ArticleClik here to view.
load torque in Line start permanent magnet synchronous motor
Hello everyone. Im got my LSPMSM motor working fine but i wanna add a load torque to my motor and i really don't have idea how to add it. Im using 2d model with rotating machinery magnetic. I read some...
View ArticleClik here to view.
How to build a Wavy wall using "COMSOL Geometry "
Dear All I am pretty new to COMSOL and I am working on Natural Convection In Cavities which is having either one wall or multiple wall having a simple Sinusoidal wavy profile or which might be having...
View ArticleClik here to view.
Heat Transfer to a laminar flow in a microchannel
Hello, I am currently simulating the heat transfer in a bent microchannel using the Conjugate Heat Transfer Physics. The simulation worked satisfactorily. Now I want to calculate heat transfer...
View ArticleClik here to view.
Simulation of crack propagation using mixed mode intensity
Hi all, I have read 2 following documents that related to crack propagation.www.comsol.com/model/mixed-mod...of-a-laminated-composite-19961www.comsol.com/model/single-edge-crack-988 The examples talk...
View ArticleClik here to view.
Calculating flux in more than 100 cutlines in 2D
Hi I have a 2D model that I have to study the flux distribution in it (not B). I drew a cut line and used ''Additional parallel lines'' in that cut line to draw more lines. when I integrate over that...
View ArticleClik here to view.
Postprocessing and visualization
How can I plot in a self-defined function instead a cut line within a 3D model?
View ArticleClik here to view.
Eigenvalue solver in COMSOL
I am solving a PDE in COMSOL with the eigenvalue solver. When I compute the solution I get only one solution when in reality I should get an infinite number of eigenmodes. How do I access the different...
View ArticleClik here to view.
Optimize deformation
Hi I have a static simulation where I deform a 3D structure. I would like to use the optimization module to find out how much I need to pull in the edge of the structure so that a certain point inside...
View ArticleClik here to view.
Solving multi domain (different diffusivity) Poisson-Nerst-Planck equation
Hello all, I am trying to solve multi domain (diffusivity is different from each region for c1, c2) Poisson-Nernst-Planck equation. In order to do this, I am coupling electrostatic(es) module and...
View ArticleClik here to view.
immersed boundary method
Hello everybody , i'm really new in Comsol and i'm wondering, if comsol offers the possibility to simulate the flow in an elastic pipe by the immersed boundary method. Best regards, Paolo
View ArticleClik here to view.
Mass absorption
Hi everyone, I am modelling a mass diffusion problem in tissue. I need to model absorption of a certain species by cells in the tissue. The cells can absorb a certain amount of the given species before...
View ArticleClik here to view.
DISPLACEMENT
Hi All, I got a small problem and I think someone may be having an idea of how to solve it. I have run my simulation in COMSOL 5.0 and determined the displacement in the color legend. I applied a point...
View Article