Linking swept with thets
How can i combine a swept and thet mesh together? Picture shows actually totally my problem :D Im done with the rest and really happy ;)
View Articleslab-waveguide simulation / scattering losses
Hello, I'm attempting to simulate a simple slab waveguide (see attached). The waveguide has a core of n=1.5 surrounded by air (n=1) above and below. This design is surrounded by PML rectangles. The...
View ArticleHow to Improve Convergence in Natural Convection
I am wondering how I can improve convergence in my natural convection model. It is a simple model; an isothermal aluminum plate in water. The model starts out fine but as the run continues (transient...
View ArticleWaveguide amplitude errors, scattering boundary condition
Hello everyone! I am modeling a waveguide with the purpose of verification, but I am getting high errors in amplitude when the length of the waveguide is not a multiple of the wavelength of the...
View Articlerf mems switch design (comsol 4.2a)
HeLLO, i'm working on designing a switch that should work on rf range. I'm able to draw 2d structure in work plane but still not able to fix one side of the cantilver beam. i hve following questions,...
View Articleimpose a local young's modulus on many subdomains
hi everybody i want to make a script (matlab) to impose a local young's modulus on many subdomains (attached image of my subdomain) someone have any idea how to make it ? thank you very much
View ArticleSet pressure and mass flux on a internal boundary.
Hello, I need to set an specific pressure and a mass flux between two domains on a internal boundary condition. There is any way to do this? I would appreciate if someone could help me. Thanks
View ArticleSet pressure and mass flux on a internal boundary.
Hello, I need to set an specific pressure and a mass flux between two domains on a internal boundary condition. There is any way to do this? I would appreciate if someone could help me. Thanks
View ArticleStationary / time dependent solution differs
Hello everyone, my model is a U-shaped pipe in a concrete block. Cold water (1°C) flows through the pipe and the warmer concrete (11°C) surrounding it warms up the water inside the pipe. I used the...
View ArticleAC Joule Heating question
I'm currently on a trial license trying to evaluate this product for my company. I have here an assembly of 3 connectors. One end is given a terminal condition (with 2000 or 3000 amps), the other is...
View Articlemodel coupling
Dear comsol users, I am a new user of comsol and I am building a 3d model with two physics: laminar flow and thin film-shell. I am trying to set the outlet pressure of thin-film flow as the inlet...
View ArticleHeat equation in cylindrical coordinate
Hi Does any one know how I can use cylindrical coordinate in 2D (r &theta) in heat trasnfer module for the heat equation? Basically I want to monitor conduction in radial direction only. Thanks
View ArticleA simple question for COMSOL v3.5a
Hello, I am now trying to use the femlin() in COMSOL v3.5a. According to the documentation, [Ke,Le,null,ud] = femlin(fem); Ke and Le are the stiffness matrix and load vector. null is the matrix...
View ArticleModélisation des écoulements à travers un barrage en terre
SVP , est ce qu'il y a quelqu'un qui peut m'aider à modéliser les écoulements dans un barrage en terre homogène sous COMSOL multiphysics. Ci attaché le model Le niveau de l'eau se trouve à 13 m de...
View ArticleLocal coordinate system for material properties
Dear all, we are trying to do an eigenfrequency analysis of a car tire and are struggling with defining the correct elastic material properties for the tire plies. The tire plies are fibrous composites...
View ArticleA time-dependent Free molecular Flow study
Is it possible to do a time dependent simulation incorporating free molecular flow physics in a reasonable amount of time. A stationary study is pretty fast to converge, but the time dependent study...
View ArticleCooling Towers
Can we input humidity for simulating cooling tower on COMSOL 4.3a? Can you help me with amy examples, if any??
View ArticleShallow-channel approximation with wetted wall in Laminar Two-Phase Flow
Hello, in earlier versions of COMSOL (eg. 4.1) it was possible to define a wetted wall boundary condition simultaneously with shallow-channel approximation in the two-phase flow physics. However in...
View ArticleModeling a spring and damper system
I am having trouble modeling a simple 2D spring mass damper system. The geometry comprises the spring at the upper end anchored (fixed) attached to a square mass which in turn is attached to a damper...
View ArticleThermoelectric Model
Dear All, I am looking to find and study example models relating to thermoelectric effect modeling using COMSOL. Does anyone have any reference source/model on thermoelectrics which could be used ?...
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