Help modeling supercooling effect in water to ice transition
Hello everyone, relatively new to COMSOL here, I am trying to create a model describing a simulation that took place in a climate chamber. I have attached a graph describing the temperature on the...
View ArticleCoupling of Electrostriction and Radiation pressure forces in silicon Waveguide
Dear All i hope that you are well, please if you can provide me by information about modeling such problem. Best regards Hassanain
View Articlefemur modeling
Hi! I am building a model of femur(thigh bone) and aim at studying their stress and strain distribution on applying a pint load.I have built the model but it doesn't seem to compute,and i can't figure...
View Articlepid control and constraining a variable
Hi, i'm making a pid control of a heat exchanger and I need to constraining the inlet velocity of fluid. The inlet velocity is calculated by the pid control law, but need to be constrained between...
View Articledifference in simulated stress and strain
Hi, I simulated stress for a 2D Silicon structure using "thermal stress" in COMSOL, the simulated stress values are quite consistent with my experimental results. however, when I look at the simulation...
View ArticleModeling intensity field from high-intensity ultrasound source WITHOUT...
Hi, I cannot afford to buy the Acoustics module, so I'm wondering if it's possible to model the energy being deposited into a material due to multiple ultrasound sources. The KZK equation can be used...
View Articleusing identity boundary condition.
Hi, I have just started using comsol and currently using 3.5 a I want to capture internal circulation inside a drop but i am not getting the velocity profile showing internal circulation. can anyone...
View ArticleHow to export a interpolation functio file.
Dear people, in a past thread I got an answer about interpolation function (http://www.comsol.it/community/forums/general/thread/32219/) but I don't know how export the interpolation function file, to...
View Articlesubdomain
hello I am working on design of photonic crystal fiber with Comsol using RF(mode analysis). I am using comsol with MATLAB. when I use loop in matlab to change the geometry to find the solution for each...
View ArticleWhere should I put constraint
Hi All, I'm not sure where I should put constraint or maybe I should use prescribed displacement in my model? My model (in attachment): I calculate the stationary state then I use stationary...
View Articlehelp about the finding parameters
Dear all I have problem in my model that , in the two coil system Excited primary coil with the Multi turn coil , and want to see the voltage , current and power in the second coil , and i want to see...
View ArticleConcetration should decrease when heating up a gas?
Hi, I´m modelling a gas that initially is entering to my geometry, with a given velocity, at a fixed concetration of H2 and at 25°C. In this geometry there is a barrier that is at 1100°C that is in...
View Articlefluid structure interaction
Hi , I'm facing a problem with FSI module . for the model in micro fluids library ( obstacle in fluid ) the dimensions are in microns , when increase the dimensions in Cm ( only scaling the model ) ,...
View Articlethe result of building half model to modal ansys(or eigenfrequency ansys ) is...
I build two models to modal ansys, one is half model and the other is whole model(the model is symmetrical),but the results i got is different. frist , the number of whole model`s modal Shape under...
View ArticleHow to rename / view /specify specific boundaries in the geometry.
Dear sir, I have a trouble locating specified boundary in the geometry. I am new to learn COMSOL. I follow up tutorials that asks me to define certain conditions at certain boundaries. I depend on...
View ArticleHeat Pipe on a Heatsink
I watched the tutorial for Heatsink Analysis. I was wondering if we can develop the model by adding a heat pipe. I was told that it needs to be developed as a porous region but how the -thermodynamic...
View ArticleProblem: Oil Droplets Seem To Dissolve In Water (Two-Phase Flow, Level Set)
I have a problem with my "Two-Phase Flow, Level Set" simulation in COMSOL 4.2. I am trying to simulate the formation of oil droplets in water by hydrodynamic flow focusing. The water and oil are...
View ArticleMeshing
Hello, I"m looking for good tutorials for showing the method of "user controlled mesh". I cannot find any good tutorial in COMSOL. Please let me know. Thanks.
View ArticlePiezoresistive modeling
Hello all I want to simulate a piezoresistive beam with Comsol. I was looking to find an example of piezoresistive modeling to find out what module they usually use and how are the settings but i...
View ArticleConvergence problem of contact mechanics
Hello, Following the earlier discussions on implementing an algebraic equation into a structural mechanics model, I fortunately got away with writing out explicitly an analytical solution. Thanks a lot...
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