PhD 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 Articlecomment traiter des ions dans mon nanoflidique
Bonjour, Je suis en train de simuler les nano-fluidique qui est entouré par une couche de SiO2. Et puis on passe de l'eau ou d'autre liquide dans nano-fluidique. Dans un premier temps, je mets la...
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...
View ArticleProblem in cylinder geometry
Hello, I'm a new user of Comsol and I have the following problem: I'm is using a cylinder geometry with radius:0.013m and lenght: 172m when I build this geometry I dont have a cylinder in the grafics...
View ArticlePlasticity - Cyclic Hardening
Hi all, I am modelling a process where a steel plate is subject to cyclic forces that cause plastic deformation. As the process is cyclic I am inclined to use the kinematic hardening option - I am...
View ArticleFlow in simple geometry does not converge
It's been my first day with Comsol and it's CFD package, so please don't be too hard on me. I have (succesfully, I believe) built my first geometry. It consists of a tube that has several inlets on one...
View ArticleLarge Magnetic Force
Hello I'm modelling a simple E-shaped core made of iron and everything looks fine to me (!) There is an air gap between the core and the armature to which the magnetic force is applied. The magnetic...
View Article2-Step Full Field followed Scattered Field Simulation
I am trying to solve for the scattered electric field from a gold nanoparticle on a semiconducting substrate, using a 2-step process identical to the example file "Scatterer on Substrate." When solving...
View ArticleContinuity equation and momentum equation
Hi.. i'm new in comsol.. i'm doing 2 d simualation of wind passes through the hill by comsol multiphysics 4.2. May i know, did i need to specify momentum and continuity equation (ux+vy=0 and...
View Articlehow did I acquire the position of particles in particle tracing module
I have a confusion which is to get the data of particles when I use matlab linking with comsol. But the function of mpheval is error. For instance, qx=mpheval(model,{'qx'},'dataset','part1','t',0);...
View ArticleError from the Modal Frequency Response analysis
Dear all, I am trying the Modal Frequency Response analysis tutorial with the elbow bracket example in the Model Library. However, if I try to run the tutorial model file for modal frequency response...
View Articlesine excitation
Hi all. I am performing a 2D frequency analysis in the Structural Mechanics Module. I want to apply a prescribed displacement on the left boundary and to see which waves propagate inside the medium....
View Articlehow to set up the ions in water dans my nano-fluidics
hi everyone, I'm trying to simulate the nanofluidics covered by a layer of SiO2 of which the thickness is about 50nm. In the nanofluidicsm there is water or other liquid. First of all, I set the...
View Articleload model
hi it's possible to load a model create in the workspace of matlab (see figure) ? thanks best regards
View ArticleMagnetophoretic Separation
Hello, I'm trying to simulate magnetophoretic separation in a cylindrical cavity filled with water. Something in my simulation is still missing or wrong, I would be grateful if someone could help! I...
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