2D 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 ArticleFracture flow in a single fracture
Dear Comsol community, I've been trying to model fracture flow in a porous media and I've encountered a big problem. I'm trying to simulate flow in a fracture. I've modeled a well pumping at the rate...
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,...
View ArticleElectrical Circuit and Comsoll
Dear memebers I Work with Comsol 4.3 ACDC. I know now how to import a SPICE Netlist to Comsol.But I still have a problem. I followed the exmaple in ACDC modul called "inductor in a Circuit". So to be...
View ArticleTemperature effect in Electrostatic module.
Hi, I am using Comsol ver 3.5a. Can anyone guide me that how could i observe the effect of temperature on capacitance value in Electrostatic module ? From where i can change/control the temperature in...
View Article[Batch Run on Linux Cluster Problem]
Hello, I am currently trying to run COMSOL/4.3a in batch mode on our university cluster. I am able to submit the job and pull it back after computation. However, although the size of the *.mph has...
View ArticleHow to 'fill' the space between two parametric curves.
Good morning, I'm trying to make an S shape drawing to my model that consists in two rectangles and 4 parametric curves ( forming 2 semi-circles). But when I make the extrusion the parametric part of...
View Articleheat exchanger
Hi Im trying to model a heat exchanger under Conjugate Heat Transfer module but i got an error. I attached the file. Would you please look at it and let me know where is my problem? Regards
View ArticleSliding boundary conditions in Solid Mechanics
Hi! I am trying to model a sliding boundary condition between to elastic bodies. By sliding condition here I mean, that the DIFFERENCE between the displacement fileds should always be zero in the...
View ArticleDifference Between Fixed Constraint and Rigid Connector .
Whats the difference between fixed constraint and rigid connector ?? I'm trying to simulate a Frequency Response Analysis on a Aluminum Box that has a 'shaker' on it's lid and the lid is fixed to an...
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