Can I use beam module in structural mechanics to analyze plastic problems in...
Hellow, Can I use beam module in structural mechanics to analyze plastic problems in a beam? I have tried to use the variable Young's modulus to simulate nolinear stretch, but I don't know how to...
View ArticleRadition pattern
Dear Fellows, I simulated dipole antenna and calculate the normalized electric field in the gap of the antenna (near field). Now I want to plot the radiation pattern. Can you tell me where I can find...
View Article"Use space coordinates as arguments" check bock - Interpolation Functions
Dear support-team, recently I updated my Comsol from 4.2a to 4.3a. In my models I use the interpolation functions. In the 4.2a version there was a check box "Use space coordinates as arguments" which...
View ArticleMathematical Particle tracing - resintence force
Hi! I'm trying to compute some trajectories using Comsol Math. Particle Tracing in the Newtonian formulation for some force which is of the form: F=F1+F2 where F1 is proportional with the...
View ArticleMathematical Particle tracing - resintence force
Hi! I'm trying to compute some trajectories using Comsol Math. Particle Tracing in the Newtonian formulation for some force which is of the form: F=F1+F2 where F1 is proportional with the...
View ArticleSystem matrix error in structural mechanics module
Hello! This is in reference to a femur model built to study stress and strain variation upon application of force.However,even after setting the boundary conditions and meshing,it displays an error...
View ArticleDeformation of liquid droplet
I am new to COMSOL, so I am referencing a work on deformation of liquid droplet impacting a solid surface. I tried to recreate the same model as that work. But I ran into several problems. As I tracked...
View ArticleModelUtil.connect(solverHost, solverPort);
Hi everyone, I try to compair the results of two solvers running in parallel on two different comsol-servers. Therefor I try to establish a link from my Java-API to two comsol server. But only one...
View ArticleHelp...Which Iterative solver settings for 3D RF module with periodic...
Hi All, Can somebody help me with my solver settings confusion. I'm trying to setup a 3D RF module simulation with around 250.000 elements only with periodic boundary condition. I read that I should...
View ArticleElectric Field in an object place in an EM field
Hi, I am quite new to COMSOL and with some help from tutorials I have built this 3D model where a cylinder is placed in the electric field radiated by a dipole antenna. To calculate the Electric field...
View ArticleDirect comparison to strain gage
I'm modeling a simple fixed-free beam to compare with a piezo strain gage with a foil strain gage that I have on an actual beam (aluminum, 20cm x 2cm x 2mm). I'm trying to decide which strain I should...
View ArticleVoltage source in AC
Hi. i'm studing an inductor to analyze inductance and resistence od the model. I use electrical circuit and i work with AC frequency of about 20kHz and i have some questions: 1)Vsrc in voltage source...
View ArticleHeat source
Hi all, I have a model composed of three layers, three different materials. How could I insert a triangular power profile(as heat source) in the second domain. Example of power profile ( t=0s P=0w;...
View ArticleLumped port
Hi, Do i have to use some particular dimension when i use a lumped port? I mean do i have to use a particular hport an wport ratio? Thanks Nicola
View ArticleDependence of Electric field on mesh size in RF modeling
We would like to model our laser in an RF module, solving for electrical field strength, to see the optical field distribution as a function of layer thicknesses, however we kept seeing unexplainable...
View ArticlePlotting in air, postprocessing, 4.2a, RF module
Dear All, I have some issue. I made some calculation of gold nanosphere on substrate, and now I want to plot normalized electric field. BUt, thing is I want to plot emw.norm^2 not just on sphere, also...
View Articlemeshing a cylinder
Hi All, I have been having some issues meshing a cylinder. When you define a cylinder in COMSOL, it splits the curved face into 4 quarters, and as a result, when I went to mesh the cylinder I was...
View ArticleStop condition
Hi all I am running a time-depedent heat transfer simulation. I want to stop the simulation when the average temperature is higher than 310K. i defined Tm as the average temperature in the domain. I...
View Articlecartesian vs cylindrical coordinate
Hi My problem is flow through a pipe surrounded by a rectangular block. Now I want to solve 3-D continuity, momentum and energy equations. Now, those equations need to be solved in cylindrical...
View ArticleMatlab function in Comsol handover String
Hi everyone, thanks to the discussion on http://www.comsol.com/community/forums/general/thread/7946/ I've successfully included a matlab-function with 3 arguments (equal to the tree dimensions of my...
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