internal normal flux
Hi All, can someone please let me know what comsol means by internal normal flux down/up side in a 2D model. Is this different from normal total heat fuxes? Is it related to the out of plane fluxes...
View ArticleCauchy free drainage boundary condition
Hello, I need to implement a Cauchy condition in the Richards equation module. In particular it should be a free drainage condition on a boundary (ie water is immediately removed from that boundary out...
View ArticleMultiphysics Simulation: An IEEE Spectrum Insert 2018 Is Available Online!
Hello!We are excited to announce that this year's edition of Multiphysics Simulation is available online: www.comsol.com/offers/multiphysics-simulation-2018Read the magazine to learn about a variety of...
View ArticleConcatenating Solutions from Parametric Sweep
I'm doing a parametric sweep over frequency for my model. I'm doing small sweeps in order to see if that particular sweep was in the range I wanted, or if I need to keep sweeping. So 20 x 5min sweeps...
View Articlelaminar flow velocity profile does not run after saving the file
i ran a laminar flow velocity magnitude profile of 12 hours cycle (Sine wave) yesterday.It ran perfectly...and then i saved the file.After saving it i tried and that still ran.but today when i try to...
View ArticleHow to get output variable of thermoelectric generator
i'm doing a simulation of a thermoelectric generator. after designed geometry, specified different materials and temperature of cold and hot sides, i have got : output voltage, temperature...
View ArticleTruss in fatigue modelling
Is the fatigue model only available for solid mechanical modeling? How to simulate the fatigue model for truss modeling (edge molder)?
View ArticleHeat source probing of a single domain
Hi, I am simulating time dependent heat transfer of an IC. The IC have several heat sources that are temperature dependent and I like to probe those heat sources in order to have the temperature and...
View Articleusing DerivedValues - Surface Integration as objective function
Hello!I have created a model, which solves a structural problem. Geometry in this problem depends on parameter b. I'm calculating maximum von Mises stress in a region using Derived Values->Surface...
View Articleprescribed displacement (point)
HiI used prescribed displacement(point) condition to make a bending modelI have a question about the rotation of the prescribed displacement condition.Is the point free from rotation?or rotation is...
View Articlebottle water impact with floor
HiI need simulate the impact of a water bottle with a horizontal rigid surface because of the gravity, with different indicial condition on the water, like wave in the free interface, vortex, etc. I...
View ArticlePartial differential equations for surface integration.
I am trying to calculate the expression as written in the attached file at a given surface of my electromagnetic simulation. Am i correct in my expansion and how would I then go on to implement this in...
View ArticleAdhesive Contact - Multilinear Seperation Law
Dear all, I would like to model the shear deformation at the interface between two parts. I need something similar to the multilinear separation law, but I would like to be able to extend the...
View Articlesaving a file
I am now working on comsol 4.3 b. My lab has installed an older version of comsol.Is it possible to save my file in 4.3b to an older format?Thanks in advance
View ArticleCNT strain gauge simulation
I am working on a simulation study of CNT composite strain gauge placed on a cantilever beam. My simulation study has piezoresistivity multiphysics. I am unable to get resistance value for my strain...
View Articlepde interface
The below post is related to an archived discussionHello,I am not a professionnal in the programmation but I want an explication about pde interface how to introduce it with comsol.Thank you
View ArticleSimulation of phase transformation inside a moving object
It is necessary to determine the period of time over which the water temperature (the initial state is ice) change from minus 30 degrees Celsius to plus 36 degrees Celsius. Water (the original state is...
View ArticleIs it possible to rotate the material structure for a 2D model in all cases...
I've searched and seen similar questions posted a number of times, but not really answered. And even through the support it was not clarified for me either. The examples given use 3D not 2D models.The...
View ArticleConditional disable of nodes in model tree depending on study.
I have a model containing two studies (Eigenfrrequency and time dependant structural). I use the modal analysis to look at the resonance and then the structural to look at the peak stress with a...
View ArticleCurrent sources with different frequencies
Greetings,I am trying to simulate interferential stimulation, where 2 pairs or more electrodes are applying different AC frequencies. Is it possible to do that in COMSOL? It seems that when I use...
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