Magnetic Force on an armature
Hello I'm dealing with a very simple problem that has been very frustrating for me! I would appreciate if any one can assist me with that. I'm modeling an E-shaped core in 2D magnetic field module. It...
View ArticleLarge Eddy Simulation
hello I want to use Large Eddy Simulation on comsol but I can't found it. Can you help how to do this. thanks a lot
View ArticleBase vector coordinate system
I am modeling the anisotropic behavior of a plate that have fibers oriented in different directions. For this purpose, I am using the structural mechanics feature. I am orienting my fibers using a...
View Articlehow to do moving mesh in 4.2a
Hello everyone I am implementing a rectangular piezoelectric converter, in which i want to be vary the length and width of the piezo layer via moving mesh ale. I studied one of the paper of "Thickness...
View Articleexport mesh data for an explicit selection
Dear all, I am a relatively new user COMSOL with a lot of Finite Element experience both on the programming and theory level. I started with COMSOL today which went actually quite fine and fast. I...
View ArticleCapacitance matrix evaluation (electrostatics)
Hello everyone, i have a question about the capacitance calculation method. In comosl example "Capacitance matrix", it explains that the electrostatics model use the Charge volateg relationship (Q = C*...
View Articleinterface to be used in studying electrochemical reactions
what interface should i use in Comsol 4.3b if i want to study species transport inside the electrolyte,ion transport including convection,diffusion and migration and electrodic reactions represented by...
View ArticleMapped Coordinate System for L-Shape
Hello, I would like to simulate the deformation of an L-Shape made of carbon fibers. In the beginning the L has an angle of 90 degrees but after it is cured in the oven, there is a spring-in effect,...
View Articlemoving inner boundary by defining prescribed displacement
Hello everyone This may have an obvious answer but I am a bit new with Comsol so I am playing around with various interfaces, particulary the ale interface. I am trying to deform an inner boundary by...
View ArticleHow to use compressible gas flow .
Hi I am trying to find a module for doing the analysis of a gas flow in a little 2-d chamber where I am using a compressible gas at a predefined pressure from a tank ranging from 3-6 psi-g at the inlet...
View ArticleHow to find Piezoresistive coupling matrix of gold,Al.
Hi All, I want to work on piezoresistive bases sensor using common material like Al/Au.But I can not find Piezoresistive coupling matrix of gold,Al in m^4/(s*A^2) unit.What should I do? Do any of you...
View ArticleWeak Constraint thermal flux
Hi every body I am using Weak form to model strongly coupled thermal-structural equations.My model consists of two layers. I used Weak constraint to ensure that my thermal flux will be continuous but...
View Articlehelp on error : failed to evalute jacobian
hi everyone, i am using comsol 4.2, and i want to plot\solve the temperature field the is generated around a gryogenic probe. i have a datasheet of the change of temperature of the probe in time...
View ArticleHow to add scattering conditions
Greetings, I have been conducting simulations using the RF model for 2D boundary analysis of optical waveguides. I have noticed that for some structures I have some kind of resonance from the outer...
View Articleactive vibration control
Hey all, I am working on a an active vibration control progect with a cantilever beam, piezo electric actuator, and with a location measurments components. but first i need to simulate the whole closed...
View Articlecomsol element reference and theory manual
Dear all, Depending on the module that is selected, the elements are selected automatically also I guess. I have several questions related to this proposition if that is right, namely, + Is there a...
View ArticleCouple diffusion and convection
Hi, I have a packed bed with spherical elements from which material is being extracted. I would like to know the concentration profile in the particles and in the axial direction of the packed bed. I...
View ArticleMoving mesh 2D
Hello, I am trying to simulate the moving boundary for a 2D geometry. I started with a simple 2D geometry where 1 boundary is moving in the x-direction and 1 boundary in y-direction, but because the...
View ArticleUsing a Gaussian Pulse
Hi everyone, I'm actuallay working on a modeling of a laser pulse which is heating a front of a material in order to determinate the diffusivity, my current issue is that i would like to model my heat...
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