Ampere Law (mf module) and Magnetic flux conservation (mfnc module)
Hi all, I'm really new at comsol and I'm trying to study some models. Now I have noticed that there is an example of an electromagnetic quadrupole (name "quadupole") which is a 2D model and it is...
View ArticleElectrical Conductivity in the RF Module
Hey, I have a question considering the setup of materials in the RF module. Comsol offers three different parameters to set up the materials in this module: the electrical conductivity, the relative...
View Article3D simulation of drop coalesnce
I am try to solve the two drop coalescence by applying the two phase flow and phase field method in comsol. 2D it solve the problem very accurately. but 3D is not. kindly suggest any modification need...
View Articleapply a ground motion on a simple structure
Dear all, What would be the best way to simulate the ground displacement motion in COMSOL? Basically, I have a simple tube structure that is excited by a shaker and I would like to simulate the shaker...
View ArticleFinal Abstract Submission Deadline for COMSOL Conference 2013 Boston is...
Dear COMSOL Community, *TOMORROW* is the Final abstract submission deadline to this year’s COMSOL Conference in Boston! New and updated abstracts are coming in every day and I truly appreciate your...
View ArticleMeasured refractive index profile import to COMSOL
Hi, I have measured some fibers refractive index data and I want to analysis them in the COMSOL. I know use the RF module can solve the modes and I need to set the index either a single value or...
View ArticleCustomized BH curve
Hi all, I'm studing a quadrupole permanent magnet and I would like to know how to give comsol a customized BH curve. I'm using Magnetic flux conservation (mfnc) and here you can set the BH curve but I...
View ArticleUrgent help in Meshing required...
Hi, Im working on building a rf MEMS switch since past months. The big problem i'm facing is in user control meshing. i'm still not clear what to select under ''size of minimal element, Size of maximum...
View ArticleDisplacement no symmetric
Hi there, I modelled a simple beam under axial load (20N). The strain and stress values are matching with the theoretical results. But there is no symmetry in the displacement results. The displacement...
View Article3D electrocoalescence with multiple inlets
Hi I have based my simulation on the electrocoalescence example except I have two phases coming in at the inlet. As such I have defined an explicit boundary selection for each inlet phase and have two...
View ArticleNatural Convection in a Box
Hi, I'm trying to get that cats eye picture of natural convection in a box. My solution converges but I dont see any streamlines. If someone can spot a mistake that I made, it would be helpful. I am...
View ArticleWeak form PDE Boundary Conditions-Weak Term Edit Field
Hi, I am trying to solve equation that has a weak form: -ux*test(ux)+a*ux*test(u) My boundary conditions are: ux(-L,t) -a*u( -L,t)=0 and same for the other end x=0 I am very new to the Comsol and I am...
View Articlecoding in comsol without matlab
Hi all I am working with different designs of Superconducting coils. As of now for my designs, I am using matlab code for building designs of the coils. I have attached 2 figures. The first figure...
View ArticleLaser heating and laminar flow
I'm trying to build a model to study the temperature distribution within a microfluidic channel. Liquid flows through the channel and heated by a laser beam. I used NITF for my modeling, and enter Q...
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 ArticleHow to simulate the Surface roughness for a solid particle
I want to simulate how the liquid to wet solid particle by considering the capillary force and surface roughness. I have simulated the capillary force by level set. but for the surface roughness, I...
View ArticleGlobal strength in Solid mechanics module
Hi everybody, I'm using Comsol with the Solid Mechanics module, and I would need to compute the global strength applied to my system. But I can't find how. In the results nod, global evaluation, I can...
View ArticleParameter Sweep on Geometry
Hi everyone, I created a geometry whose dimensions are related to a few parameters which I have been defining under "Global Definitions > Parameters". Now I would like to change some of these...
View Articlebuckling of a beam clamped at both ends with initial stress applied
Hello, I'm a newbie using COMSOL v3.4 structural mechanics mode. I'm simulating a silicon beam (~100 micron long, ~500nm cross-section side) clamped at both ends with initial stress applied (in the MPa...
View ArticleHow to get electrical force in AC/DC module
Hi, everyone! I am building a model in COMSOL. In this module, I build a container full of dielectric, like water. And I will put two electrodes on the opposite side, one 5V, and the other 0V. And I...
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