Large 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 ArticleCountor data set does not generate plots
Hi, I´m solving a very easy Laplace equation on Comsol, I would like to extract values of some variables I´d define along the isolevels of another user define variable. I´m able to create the Contour...
View ArticleFluid flow with a moving solid object/hole
Hello, I would like to model the airflow in a room occupied with people, and to allow the people (cylinders) to move around in the room. Is this possible in COMSOL? For a silly example in 2D: I have a...
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 Articleoptical fiber modeling
Hi everybody, 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 am performing a simulation of light coupling...
View ArticleHeat Flux Boundary Condition
Hi, I am trying to impose a constant heat flux BC to the common face of two metal blocks. But comsol does not allow me to select that face for this type of BC. In fact, only outer boundaries are...
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 ArticleRF frequency domain scattering electric field module- normalization of...
I am uncertain if I am incorrect in my assumption, so I have come here hoping someone can clarify for me. emw.Ex -displays the scattered electric field emw.Ebx -is initial background electric field...
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 Articleparameter sweep error when loading a geometry
I am applying a load to the top of the geometry shown while the bottom is fixed but i keep getting an empty parameter sweep error can u help me??
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