Plotting ratio of displacement
Hi, I am using COMSOL 4.2.1.166, and am simulating a circular membrane as a Structural mechanics 'plate'. I simulate to get the mode shape of the fundamental mode for a uniform load in the normal...
View Articleintegration of interpolation function
Hi, I am simulating a heat transfer problem in 2d. I would like to have my heat source as a function of a new variable (j) which is not a variable in the set of equations. I am importing a...
View ArticleLevel Set Methods
My simulation involves droplets in a microchannel and I am using the Laminar Flow Level set methods for the solution. It will be very helpful if anyone can post a tutorial on the working of the level...
View ArticleUnidirectional coupling of a time dependent study to a stationary study
Hello, I am using structural mechanics module and a stationary study to calculate stresses and strains in a simple 2D axi-symmetrical model. The model has a thermal expansion node. I have another study...
View ArticleOptimisation of processing parameters in laser sintering of metal/alloy powders
Hi everyone, I am new to COMSOL Multiphysics.. Can anyone help me in simulating selective laser melting(SLM)/direct metal laser sintering(DMLS) of metal/alloy powder media in layer-by-layer fashion? IN...
View ArticleEquations
Hai, I have been designing the composite insulators to analyse the Electric field distribution. How can i feed my own equations in to the study instead of working with default equations.
View ArticleMATLAB livelink solution miss-match
Dear Sir/Madam, I am handling structure mechanics problem. I want to extract Mass, Damping and Stiffness matrices. I have started with stationary (static) problem (for simplicity). My problem is...
View ArticleHow to do a Coupling a structure to a fluid domain using pairs
Dear all, My question is very simple: I try to realize a coupling between a fluid and a structure using identity pairs. My geomtry fail to be imported using the union, and I want to work with the...
View ArticleInconsistent uni-directional constraint with Conjugate Heat transfer
I am trying to model a simple high temperature hydrogen heat exchanger with the conjugate heat transfer module. While I have been sucessfull in modeling individual tubes of the hydrogen alone, I cannot...
View ArticleHow to simulation thermal expansion with a T dependent CTE
I would like to simulate the thermal expansion of an combined object from cryo temperature to room temperature. My current conditions are: COMSOL version 3.5a, simulation model is smsld, the CTE...
View ArticleWebinar - Introduction to COMSOL Multiphysics 4.4 – Now Online!
Hello COMSOL Community - Watch the recorded version of the webinar, Introduction to COMSOL Multiphysics 4.4:www.comsol.com/video/introduci...omsol-multiphysics-version-4-4 VP of Product Management,...
View ArticleFSI - High convergence problem
Hi all, I'm new to COMSOL and I have a problem that involves an interaction between air and a solid body. I am interested in the torque generated on the body by the moving fluid. My intent is to use...
View ArticleParticle tracing - release from a set of points
In the particle tracing module (using 3D mathematical particle tracing) is it possible to release the particles from a set of defined (x,y,z) points or from points along a parametric curve? I can draw...
View ArticleWaveguide Modeling
Hi, I am trying to make a simple model where a light source is incident of an input port of a waveguide and then it passes through a different media. I need to see the output power (Intensity) at port...
View ArticleSolving memory intensive model
Solving 3D problem with a better mesh has become an issue for my model. I am always getting out of memory errors. I was wondering if It is possible to extract the matrices and solve it with , for...
View ArticleStress gradient
Hello, I am trying to simulate the deflection of a cantilever due to stress gradient, how can I define an uniform stress gradient through the cantilever thickness?? Thanks for your help! Andres
View ArticleProblem by installing Comsol 3.3 on Windows 7
Hello, I am installing Comsol 3.3 on Win 7. I run into a problem when I am trying to load the lisense file. When I click the Browse button it notices: Error: 9040 Fatal error. - Type:...
View ArticlePoint Charge
Hello all I want to define point charges (lets say some circles as positive Or negative charges) in Comsol. Can anybody give me some idea how i can do this? what I have in my mind is: define a constant...
View ArticleResidence time in the particle tracing module
I ran a simulation of a polymeric solution inside an extrusion die by using laminar flow and carreau model. Afterwards, I implemented the particle tracing module, beacuse I am interested in the...
View ArticleThermal conductivity
Hi I have a geometry mith two different materials and i want to know the thermal conductivity of the whole geometry. I know how to use COMSOL to evaluate the thermal conduktivity but i want to know...
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