mass transfer with a rotor
HI I have some experimental data about carbon dioxide that diffuse through a membrane and reacts in a aqueous solution of MEA. I have successfully model the case where liquid is firm in the recipient....
View ArticlePlane wave propagation inside a duct (Vibroacoustic)
Hello everybody, I me dealing with an interesting vibroacoustic problem and wanna model it WIth COMSOL. The subject is : A duct (Air inside)of one meter length and cross sectional 0.2m*0.2m (width=1m)...
View ArticlePlotting Electric Field Gradient and "Dome-shaped" Electrical Field of...
Hi I am using AC/DC module to simulate the electric field distribution over a microelectrode when applying AC input voltage. I manged to get the total electric field distribution E (V/m) over the...
View Articlehow to define a variable in livelink with matlab which changes in a loop?
hi, I have a problem to define a loop in livelink. In the loop geometries with different shapes are created. The problem is how to define a parameter varies in loop? The .m file is attached below....
View ArticleHelp with fluid flow analysis on imported SolidWorks file.
Hi all I have imported a SolidWorks assembly into COMSOL 3.5a using the IGS file format. It is a smaller section of a larger nozzle that should produce swirling flows. I have attached a screenshot of...
View ArticleHow to draw a spherical dome?
Hello all, I am very new to Comsol. I am trying to draw a three dimensional spherical dome and mate it with a rectangular box. I have successfully drawn the box with a circular opening on one face. I...
View ArticleModel heat transfer in block but can't get the solution
I modelled the heat transfer within a block with some air gaps. In the model, heat is transferred by conduction in the solid domain, and in these air voids, convection and radiation are also involved....
View ArticleOverlay plot of geometry and analytic function
Dear Comsol Users I defined an analytical function depending on x and y which I would like to plot in overlay with my geometry for which it is defined (similarly to the plot on page 7 of the...
View ArticleTransmission spectrum for optical waveguide
Hello, I am currently trying to extract a transmission spectrum from a Si waveguide on top of SiO2 substrate. There are some gold particles on top of the Si (this configuration is taken from an article...
View ArticleHow to introduce non-linear variable
I am trying to introduce a non-linear variable in my temperature-dependent superconductor model, saying alpha(T)=alpha0*T_bath/T. When i run it Error:7248 Undefined value found Details Exception:...
View ArticleGeometry units
Hi, I want to draw my geometry in micro meters in comsol 3.5(a). Drawing it in meters gives very small view of certain portions. Does any one knows how to draw in micrometers? Regards
View Article1D-plot (line graph)
Hello, I am a new ComSol user. I have simulated the model and got the result plotting in line graph. I would like to have a result data in table (with xy-coordinate) How can I do this? Thank you very...
View ArticleWhat's the formulation of "mechanical energy flux" in COMSOL?
There are "mechanical energy flux," "complex mechanical energy flux" which I can derive or plot in the result. They are cool but still I want to know the definitions of them, how it calculates, and I...
View ArticleMesh Curved Structure
Hi, I want to mesh a simple curved structure for CFD but COMSOL gives the internal error in boundary respecting. After reading a few posts, I still cannot succeed in meshing the curved tube. I have...
View ArticleFluid Structure Interaction with Piezoelectric
I was wondering if someone could help me figure out how to model the fluid structure interaction using the piezoelectric device physics model as well. I am trying to model synthetic jet actuators and I...
View ArticleHeat Transfer in a Tanker
Hi, I am a new Comsol modeler and I am trying to model a steel tanker filled with molten bitumen. The tanker is insulated and the bitumen is heated by two propane burners ( in form of U) located at the...
View ArticleVisualize time dependent solution in matlab
Hello, I am solving a time dependent problem in matlab. I can get the final solution using mphplot but is it possible to get matlab to display the time evolving solution ? Thanks praveen
View ArticleHEAT TRANSFERT IN A BITUMEN TANKER
Hi, I am a new Comsol modeler and I am trying to model a steel tanker filled with molten bitumen. The tanker is insulated and the bitumen is heated by two propane burners ( in form of U) located at the...
View ArticleGetting 2-D geometry from 3D object
Hello, I am running a mode propagation analysis of a waveguide so need to run a set of 2-D mode solvers along the propagation direction. I am wondering is it possible to get 2-D gemetry of the 3-D...
View ArticleCreating high density 2D mesh in 3D model
Hi, Firstly, sorry if this is a stupid question, I'm very new to Comsol and don't know if what I want to do is even possible. At the moment I'm just trying to model basic permanent magnets then get...
View Article