mesh quality not achieved
I am trying to simulate a problem where the particle is moving in the domain. So i have used moving mesh (ale) and assigned a value to prescribe mesh velocity for the particle's boundary. The particle...
View ArticlePressure boundary conditions
Hi All, I am working on a coupled problem involving a piezoelectric and fluid.....I need to apply the pressure from the piezoelectric after each iteration step and apply it as a pressure boundary...
View Articleerror:1038 File created by a later version of COMSOL
Hi I work with version 3.5a. I want to open a file but i encourage an error:1038 File created by a later version of COMSOL How can i open it, i think it is with version 3.5 Thanks in advance
View ArticlePCF with Matlab live link
Now i am designing on hexagonal structure PCF of six air-hole rings and successfully interface comsol 4.2 with matlab live link. The problem is that it takes a lots of time to simulate in Matlab when...
View ArticleSimulating a Magneto-caloric effect in Comsol
I have a problem in which i have a permanent magnet. In regards to theory of Magneto-caloric effect, if i pass the magnetic field to the gadolinium(rare earth, lanthanide group in periodic table),...
View Articlephononic crystal -- Acoustic Structure Interaction
hello, i'm computing the phononic crystal band structure using the Acoustic Structure Interaction modal, and the PC is 2D square lattice and the unit cell is a circle in a square area. the problem is...
View ArticleHeat Transfer in Soils
Hi, I am a comsol user and I want to have a 2d axisymmetric model. In my model, I have a soil sample that I put a steel bar in the soil. I want to heat the steel bar with a constant temperature 500(k)...
View ArticleMie scattering in 4.3
Hello, I have already seen some discussion about mid scattering of a gold nanosphere. But I the discussions I have consulted, no one has yet implemented a mie scattering program in Comsol 4.2 or 4.3...
View ArticleUsing the Optimization Module for geometry examination
Geometry optiization 4.3a Simple 1D sold state battery problem (in COMSOL) Done with assistance from COMSOL M = length of anode 320 nm L = length of solid electrolyte 1500 nm objective function =...
View ArticlePreparation of figures for papers/thesis?
If it has been written somewhere, can someone point me to where there is a guide to producing figures from 2D plots? I am using COMSOL 4.2a, and want to use some surface plots alongside legends of the...
View ArticleIntegration of MATLAB functions with more than one variable
Hi, I want to realize an integration in COMSOL 4.3a using self-written MATLAB functions. If I use a test function with one input and one output argument everything works as expected (plotting function,...
View ArticleInductively coupled plasma-High vacuum-Laminar flow-Free Molecular Flow-times...
hello! *** first question: I try to simulate the device using the PLASMA MODULE (inductively coupled plasma) and LAMINAR FLOW in a vacuum (10 millitorr). The problem is that when I run the solver, had...
View ArticleI want to simulate the deformation of two cylinders when they have different...
Hi, guys, I want to simulate the deformation of two cylinders when they have different potential. Is the model right? In the calucation, I find the model has difficulties to converge.
View ArticleUnknown function or operator
I defined an integration operator intop2 under Model 1 --> Definitions. But when I try to plot the results under Results --> 1 D Plot Group 1 --> Global 4, it says "Unknown function or...
View ArticleGraphene layer - transition boundary condition
I am trying to analyze a waveguide with a graphene layer, using Perpendicular Waves - Hybrid Modes. In this analysis, the graphene layer is considered as an infinitely thin conducting layer. Thus I...
View ArticleApparent inconsistency in induction heating solution methods
Hi everyone, I'm new to COMSOL 4.3, and I'm trying to properly use the induction heating module. While modeling the problem of a current loop heating several iron inductors embedded in water in 3D,...
View Articlephase change material
Hi, I am working on phase change material. During the simulating the Global Definitions, I can not understand that how step 1(function H) and step 2(function T_right) are working. and how they will...
View ArticleBioHeat transfer in Comsol. I am looking for a programmer for project
Solved in Comsol using the mesh geometry (3D) some physical three-dimensional problem. At the exit to the graphical construction solutions: line temperature isotherms in the (O-graphs) can be...
View ArticleRib waveguide
Hi I want to simulate this rib waveguide,but when i want to solve the problem the wave scattered every where of the waveguide that it is wrong.It should amplify the center of the waveguide. Who can...
View ArticleError during compute!! ( please help me!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! )
Hello friends! I have a muffler that will acoustic analysis it, But when the computer is compute the program give me an error. i Capture a picture of error & attached. I atteched the project, too....
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