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 ArticleInitial negative concentrations
HI All, I am trying to simulate a A+B-->C chemical reaction. I dont know why my reactants (A and B) concentration is going negative. How do I fix this? I have attached my model as well as pic of the...
View ArticleCreep - Plasticity
I want to use the non-linear structural mechanics module for simulation of plastic deformation by yielding. There is a creep module and a plasticity module. In the creep module, I find more suitable...
View Articleimport particle positions in Particle Tracking
Is it possible to import particle positions in COMSOL for particle tracking? If not, can you add one, please?
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 Articlehollow core photonic crystal fiber using comsol multiphysics.
dear collegues, Iam simulating HC-PCF using comsol based on hybrid modewaves operated at free sace wavelength 1500nm in IR region. Iam unable to confine light through hollow core. please give me a...
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 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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