combined time-dependent and stationary solvers
Hi I have a coupled system of solid mechanics and magnetic field, and I want to solve the magnetic equation in time domain and solid mechanic ones in stationary case. they are bidirectionally coupled....
View Articlefinite element method
What COMSOL product is useful in solving a system of coupled (linear) differential equations by the finite element method? Thanks!
View ArticleUsing non-linear materials ε(E)
Hello to everyone. I encountered with a problem during using an nonlinear material, where a relative permittivity depends on electric field strength in a certain material. During the simulation I got...
View ArticleAmpere 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 Article*TODAY* is the Final Abstract Submission Deadline for COMSOL Conference 2013...
Dear COMSOL Community, *TODAY* is the last day to submit your abstract for submission to this year’s COMSOL Conference in Boston! You have until midnight tonight. Submit your abstract...
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 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 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...
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