Recreating Jet Flow in COMSOL
I have temporal and spatial velocity profiles that I would like to try and recreate in COMSOL. At 0mm from the nozzle (d = 2.4 mm) the velocity is 110 m/s and at 12 mm the velocity is about 100 m/s. It...
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 Articlemode analysis of a waveguide
Dear all, I'm trying to reproduce the results which is on www.comsol.com/cd/direct/conf/.../11847_frezza_presentation.pdf (Comsol conference 2011, page 7, symmetric case, neff). Could you let me know...
View ArticleModeling rigid components
Hello, I am working on a contact model where one object is much stiffer than the other. In other modeling programs I have used it is possible to assume the very stiff surface is infinitely rigid...
View ArticleTime solver dynamics - advice
I'm in "currents and voltages" applying a current density pulse within a copper short going through the glass dielectric of a spherical copper capacitor. This is a biological equivalent, there is no...
View ArticleHow to construct a new equation in COMSOL interface? What kind of file format...
Hi, Anyone can suggest me some way to construct my own equation in COMSOL? Thanks Alex Lee
View ArticleType of physics needed to solve thermal stress and strain between 2 materials...
Hi, I'm still a new man in COMSOL Simulation. Basically, i'm not quite sure how to use the suitable physics to include in my problem stated in the subject matter. Can anyone help me on that? Since i'm...
View ArticleLarge Deformation Analysis- Convergence Problem
Hi All, I encounter a convergence problem in my COMSOL model. It is greatly appreciated if someone help me to solve this problem. As you can see in the attached model, I am modelling a cartilage using...
View ArticleFailed to evaluate variable. - Variable: mwp.V0 1 - Global scope
Hello dear Comsoler, dc.cir1.R1_i is something like in the dc module the current through R1 of circuit1... I can somehow find out what the variable name is... but what when there is a space between the...
View ArticleUndefined value found
Dear COMSOL Community I have a question regarding the example of the Vanadium Redox Flow Battery (www.comsol.com/showroom/documentation/model/14153/). I have tried to simulate it but I get following...
View ArticleHow to figure out the wave type for scattering boundary condition?
Hello, I'm a newbie in Comsol and I have a question, which you might be able to answere. I want to simulate the absorption and scattering of nanoparticles illuminated with an incident plane wave. My...
View Articlehow to get no gridlines in comsol plots
In any 1-D plotgroup whether a point or line graph is there a way to avoid grid lines and retian the tick labels
View ArticleEvaluation of line integral via Matlab
Hey! I have a question concerning the evaluation of results via Matlab: I added a line-integral to my model in the Comnsol-desktop which I can see in the exported m-file as:...
View ArticlePhD position available
Dear colleagues, We are looking for a higly qualified PhD candidate to start towards the end of this year. The PhD study would take place at the Institute for Technical Physics...
View Articlecurrent
Hi there, I´m modeling the distribution of the electrical potential applied by an electrode (1V) in different media using the electrical currents interface. For my questionaire, I additionally need the...
View ArticleImplicit boundary condition
Hello, I am trying to solve a set of reaction-diffusion equations and the heat equation, using general form PDE. On one boundary some of the boundary fluxes depend on a quantity (electrochemical...
View Articlecoil on the iron build!
Hallo everyone, please help me, i wanna only to build a coil on a iron core und this with Comsol, bu i don´t know how is going.. :/ Thank´s you in forward!
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 Articlecurrent and temperature dependent conductivity (sigma(T,j) )
Dear all, I am trying to model a conducting wire, where the conductivity depends both on the actual temperature and the actual current density. The temperature dependence is no problem. But I don´t...
View ArticleHow to deal with Contact problems, Adhesion!!
Hello Everyone, I am dealing with the topics of contact mechanics and adhesion. In my case, two surfaces are adhered strongly and I would like to model the detachment of contact or treat it as a crack...
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