Applying torque in COMSOL
I have created the drill string (pipes and joints interconnected alternatively 9 times) geometry in the XZ plane and defined the cylindrical co-ordinate system. Boundary load 10000 N is applied as...
View ArticlePhysics Coefficient PDE - "Re"build thermoacoustics module
Hey there, I am using the physics module to rebuild the 3 differential equations of the thermoacoustic module (please see attached). In the physics module I am using the coefficient form PDE (3D). In...
View ArticleDoubt with extrusion coupling
Dear all, I have been reading the documentation on extrusion coupling and the packed bed reactor example in which extrusion coupling is used. I have a couple of questions: 1) How to select the...
View ArticleReactor with rotary disk and triple reaction
Hi to all I am working on a Model in COMSOL 4.1a I have made model and it run properly but when I see the results , it seems that the input materials not go to reaction! and we have not consumption in...
View ArticleImporting an Excel point XYZ elevation file into COMSOL for modeling ice flow
Hello, I have an microsoft excel spreadsheet that has 475 point locations with known latitude, longitude surface elevation, and depth of ice for each point on a valley glacier. I also have 40 locations...
View ArticleConjugate heat transfer Interface boundary condition
Hello All, I am new to COMSOL. I am trying to solve a 3-D conjugate heat transfer problem with volumetric heat generation in the solid domain. The problem is more like solving for a temperature profile...
View ArticleSpecifying location of an import CAD in the simulation
Hello Everyone, I've been searching for a while, but I have been unable to find a way to specify where in the design space you would like an import CAD to be located. Any help would be greatly...
View ArticleDifferentiation of electric potential
I have used Laplace equation module to compute electric potential for certain geometry. Now I would like to compute electric field lines, but I am not finding a way to do that. Please help regarding...
View ArticlePenetration and convergence in contact; viscoplasticity
Hi! My ultimate goal is to simulate metal extrusion, specifically interested in the streamlines of the metal flow as the billet deforms in the die. I'm applying a prescribed velocity at the top surface...
View ArticleTo find the temperature difference between two boundaries
I have built a model and found the temperature distribution over its surface. I want to plot over time the difference between the temperatures at two points over the surface. Please assist me in this...
View Articlesolid core photonic crystal fibers
hai. Iam doing research on solid core photonic crystal fibers I have doubt in calculating mode field diameter and confinement loss of solid core photonic crystal fiber Presently doing simulation using...
View ArticleDefine an arbitrary EM wave
Hello I am new in Comsol and i have a problem : i want to calculate SAR for SAM phantom for different types of EM waves. but the source of EM waves ( signal generator ) isn't important. is there any...
View Articlehow to deform the copper ring by removing the outside layer where the...
Hello In a coupled problem of magnetic field and thermal stress, in which a copper ring is heated and also electromagnetic force is applied on it, the temperature of the outside layer of the ring...
View ArticleProblem with Neumann boundary condition definition
Hi, I am simulating a Helmholtz equation (using the PDE mode module) with a Neumann boundary condition. Some days ago, we decided to update our Comsol version from 3.4 to 4.0. In the new version we...
View ArticleWhat's the difference between Form a union and Form an assembly?
comsol version 4 In Geometry, there is an interface called Finalize (Form Union or Form Assembly). What's the meanings of Form a union and Form an assembly? Is it like this? For example, when I creat...
View ArticleHow to get the current from current density
Hi Everyone, I am simulating a piezo electric transducer in COMSOL Multiphysics 4.0a. In order to get the impedance of the transducer at different frequencies, I need the current flowing at the...
View ArticleTransport of diluted species and electrostatics
Dear Community, I am trying to combine the physics of the poisson equation (electrostatics) with the nernst-planck (transport of diluted species) in Comsol 4.1 for like 6 weeks now, and all I get is...
View Articlepulse train
Dear sir i try to get generated heat in cable termination as a result of pulse train ( apply for 5 hours) first i want to generate the pulse train (0.5ms ON and period 1 ms) the value of pulse equal to...
View ArticleQuestions about Darcy's model in Comsol gallery
I have some questions regarding Darcy-Brinkman example, Which I have found online in Comsol gallery. I will be more than happy if you can help me to figure out my problems or tell me how can I find my...
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