Effect of tension on eigenfrequency
Hi, I'm trying to model the effect of tension on the eigenfrequency, and I think I'm misunderstanding the use of boundary loads. I have a long and narrow bridge (fixed at both ends, free along the...
View Articlebuilding a multicomponent gas mixture in comsol
Hello All, I was wondering if someone could help me with building a multi-component gas mixture in COMSOL 4.2. I have my biogas composition of 66% CH4, 33% CO2 and 2% H2S and I need to define...
View Articlewave guide
Hi, I am starting study using Femlab simulation. I have problem. Actually, i want to simulate my metamaterial design but before simulate my design, i try simulate simple design. I just make rectangular...
View ArticleHow to set a radial polarized illumination ?
Hello, I am simulating a model and the source of the model is radial polarized illumination. However I do not how to set this incident light. I hope anyone who knows the answer can tell me. I use the...
View Articletry/catch in matlab for COMSOL
I am doing a parametric sweep in COMSOL with the geometry. The problem is, it is a large parameter space and a few combinations which would be unreasonable to check give an error. It is a stationary...
View ArticleParallel computing MatLab Comsol
Hi, I am using Comsol 4.3 with Livelink for Matlab. I run an optimization code in Matlab where i call Comsol to perform frequency response simulations. Now i would like to start two parallel frequency...
View Articlemesh error
Hey, I was trying to follow the PDF on comsol website ( Model ID 15) to build a model for Helmholtz coil. I followed almost all the steps except for the dimensions, so the geometry should have no...
View ArticleGain Medium with Circularly polarized light in COMSOL
Dear All COMSOL follows exp(-iwt) modeling in the and hence the absorption of the material is given by imag(permittivity) >0. If I want to simulate a gain medium, is it trivial to replace the...
View ArticleSharp Fluid-Fluid Interface
I’m new to COMSOL, and I was hoping someone here would be able to help me. I am trying to model fluid displacement in a pipe. I could use the two-phase flow module, but I don’t need that level of...
View ArticleColors For 2D Plots
Hello, I have a parametric Sweep for 10 data point. Then I need to plot them in a 2D Plot with a legend. I have done that but some colors recycle, so it can be hard to distinguish them. Is there a way...
View ArticleShow parameteric value on plot
I've made a model of a hi-pot test setup to visualize how the electric field changes at a discontinuity as the conductivity changes (fixed potential). I'ts working great, but now I want to make an...
View ArticleHyperelastic anisotropic material modeling problem
I have a hyperelastic anisotropic modeling problem. There is a swelling for the the body. That is to say, the determinant of the deformation gradient equals a fixed constant other than 1. Does anyone...
View ArticleEasy way to convert a complex solid model to shell model
I am working with a complex structure with formed sheet metal and tubes. Wall thickness of ~.030" with linear dimensions on the scale of 8 to 15". Definitely a problem that would benifit from a shell...
View ArticleInaccuracies in the formulas of the Materials Browser
Let's work with Structural Mechanics Module> Thermal stress. The temperature at which there is no change in size of your model, called Tref. L (T) - the size of your model at a temperature T. To...
View ArticleAnchor loss in resonators
Hi If I want to evaluate Q of a vibrating resonator due to anchor loss using PML, is it necessary to have the acoustic module? or, I can use the structural mechanics/MEMS module for that?
View Articlepiezoelectric potential due to a deformation
hi, an electric potential applied to a piezoelectric material will cause a deformation of the material. On the other hand a deformation of a piezoelectric material will end up in an electric potential....
View Articlecharged particle tracing help needed
hello, i have a simple box with relative permittivity and electric conductivity = 1. with the mef module i created a magnetic field along the x axis with 10 A/m. i used a working plane inside the box...
View ArticleCan I use COMSOL to solve integral equations?
Dear all, I have some integral equation to solve. Can I do that with COMSOL or I always need to change it to PDE? Thanks a lot!
View Articlegive specific values for every mesh point of a boundary as boundary condition
hey everybody, is it possibly to give different values for all points of the mesh on the boundary, respectively? for example, just a vector containing as many values as i have boundary mesh points, or...
View ArticlePlease send me tutorial for ultrasonic wave propogation through liquid
I need tutorial on Ultrasonic wave propogation through liquid.
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