Plotting the mesh of a cut plane through a 3D model
Hey guys, So i am currently doing some simulation involving parallel plate capacitors and i just want to see the difference between the meshes outside and within the capacitor. I've tried to create a...
View Articlemagnetic field gradient in 3D return zero!
Hi everybody If anybody knows that why the gradient of magnetic field in 3D models is always zero? I checked the different methods. for example I wrote d(Bx,x) or different component of B and H. Even...
View Articleconvert imported *.stl into solid
I am importing a rather complex geometry into COMSOL from Solid Works. After some tinkering with the import controls, I managed to import the object but I do not think COMSOL recognizes it as a solid....
View ArticleSurface evaporation, condensation
Hi, I want to model surface evaporation from a water flow at 40 Celsius and observe the consequent condensation on a cold surface. Can you help me with the model that I should use? I could not find...
View ArticleFace Cannot Be parameterized
Hi all; I try to import a STL file to Comsol 4.3a but this error appeared "Face Cannot be parameterized"? Any help? Thanks in advance :)
View Articleelectrostatic force cause displacement in parallel plate capacitor in COMSOL
Hi, I have been designed a parallel-plate capacitor in COMSOL. Where one plate is connect to voltage of 10V and other one is connected to GND. and a air box is around the parallel plate capacitor. As I...
View ArticleNew "Introduction to COMSOL Multiphysics" book now available
Hello, We are pleased to announce that a new version of the "Introduction to COMSOL Multiphysics" book is now available for immediate download...
View Articleerror in statonary analysis of a biased resonator
Dear comsol community, I'm working on comsol4.2a , I would be glad if i can get a solution for my following two queries: 1) I have gone through the modelling instructions given in the 'Stationary...
View Article2D geometry but illuminated from below
Hi, I want to create a 2D geometry but illuminate it from below, or out of plane, with a plane wave. Whenever I try and set the Background Field as exp(-i*emw.k0*z) (in x direction) I get errors as it...
View ArticleMeshing problem with very thin Layer, sourrounded by air.
I'm modelling a spiral inductor on a PCB. The height of the copper layer is only 70 µm. Between the turns is an air gap of 200 µm. The inductor is sourrunded by an air domain and an infinite element...
View ArticleConnecting concentric windings in inductor using periodic condition - Problem
I'm working on an inductor model which has more than one concentric layer of winding. For this problem I have the most simple case with two concentric layers of windings. I'm using the induction...
View ArticleHow to improve the velocity profile to be close to the theoretical values.
I'm trying to generate velocity profile in cylindrical tube (3D, laminar flow module) containing water. I expected it to be parabola shape of velocity profile along the axial direction with zero...
View ArticleGravity volume force in non-isothermal laminar flow
Hello I'm trying to simulate non-isothermal laminar flow through a tube, and I use 2D-axisymmetrical to decrease the computing time. The model works fine with laminar flow and heat transfer, but when I...
View ArticleRegarding Hand Tool in work plane
Hello, I am trying to design a complex and very minute pattern in micro-meter scale on a work plane but I am not able to figure out how to move the plane while working, I need to zoom in and out again...
View Articlesolution does not converge when using more intensive mesh
Dear: I am making a 2d model about laminar flow around a plane. When I use better mesh, the solution does not converge. It works quite well using not so intensive mesh. Can anybody explain this to me...
View ArticleExcavation process - time dependent
Hi, I am trying to model a real-time excavation of a borehole. Assuming that at the time t = 0, the drilling begins and at time t = 1 day, the tunnel advancement is 1 m (drilling velocity = 1m/day)....
View ArticleHow to make sure AC/DC and Structural models are coupled? SIMULATION ATTACHED
I'm doing my thesis on the magneto-mechanical coupled analysis. The attached file is only a simple example showing what I want to do about magneto-mechanical coupling. I chose to use the AC/DC model,...
View ArticleRigid connector equivalent in 4.2a
Good day i am using version 4.2a but the tutorial i am using is for 4.3 and it says to find a rigid connector in solid mechanics. I need to apply a torque to a fillet bar,what is the equivalent function?.
View ArticleCan I use "soil plasticity" in the poroelasticity module?
Can I use "soil plasticity" in the poroelasticity module? Because I want to consider plastic behavior of soil when I am using poroelasticity module.
View ArticleHow to see the plots after running in batch mode?
Hello! I managed to get comsol to run in batch mode (Linux). However, after I open my newly created output model file out.mph, I do not see any graphs available. I am solely interested in CFD module,...
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