FSI Modelling Capabilities?
Hi all! I am modelling a tube which acts as hyperelastic material. Inside the tube there is a fluid. Third object suppose to push this tube in one direction. Tubes edges are constrained. The problem is...
View ArticleMesh element volume
Dear all, I have a material property having a different value in a domain and it is function of individual volume of deformed mesh element and undeformed mesh element. Could you tell me how to get the...
View ArticleFinding the location of the maximum of a variable
Dear Comsol Community, I am looking for a way to find the location of the maximum of a variable. Getting the maximum value is easy, but so far I have not been able to get the coordinates of the...
View ArticleAsynchronous Machine time dependent startup, singularity error
Hello, I am trying to simulate a ASM in the rotating machines physics, time dependent. The Stator slots are coupled to the electrical circuit physics for a Voltage excitation The rotor slots are also...
View ArticleVariation of density
Hi everybody! I am trying to get effective index variation with density of material. How can I use this using parametric sweep.I am using COMSOL 4.3.Thank you
View ArticleEffect of sound pressure on refractive index/density
Hello fellow Comsol users, Most of my experience comes from structural mechanics and fracture and would like to ask a little help regarding pressure acoustics. The presence of high and low pressure in...
View ArticleAbout creation of struturegeomerty
Hi...! I am a student of University of Pune,working on Rf MEMS Switch. I can't get how to create a structural geometry of cantilever beam in Com sol multiphysics. So please help me to create a...
View ArticleMagnetic Force on an armature
Hello I'm dealing with a very simple problem that has been very frustrating for me! I would appreciate if any one can assist me with that. I'm modeling an E-shaped core in 2D magnetic field module. It...
View ArticleDefine simple-support boundary condition of a beam (Solid Mechanics)
Hello everyone, I am a new Comsol user and through the past few months I have made simple models comparing the results with some theoretical models. I will bother you with plenty of questions the next...
View ArticleIssues with Full Coupling of Physics
Good day, I am having issues with fully coupling two physics. My system contains the solid mechanics physics coupled with a general form PDE to model concentration change and the diffusive properties...
View ArticleSolid Mechanics - Linear Elastic Material - Thermal Expansion
In the solid Mech - Linear Elastic Material - Thermal expansion node, there are two tabs: Model Inputs & Strain reference temperature, which both contain places to write temperature values. What is...
View ArticleCoupling B/W two solid stress-strain modules
Hi all, I am trying to model a 3D structural mechanics problem with two separate solid stress-strain modules coupled together at the interfacial boundary through equal displacement boundary condition...
View ArticleAnimation depending on distance
Hello dear Comsol gurus, I have made a CFD simulation (stationary) which is based on the model library example of the static mixer. I have also generated the slices and surfaces to see how my fluids...
View ArticleUnusual condition between two fluids
Hello, i`m new here, then sorry if this is a silly question... I need to set the follow condition in the interface between two fluids: ro_v*u_v*hfg = ro_l*u_l*hfg = lambda_v*(dTv/dx) -...
View Articleaccess to any solution (more than one parameter)
Hello When I do a parametric sweep with only one parameter, I can access to one particular solution with the operator "with", for example, with(1,emw.Ez) gives me the z-electric field for the first...
View ArticleDetermine Burst Pressure
Hello everybody, I'm working on a mems pressure sensor, I want to know how we can calculate the burst pressure of diaphragm. Any help will be greatly appreciated.
View Articleoutput data to file via script
I am trying to script a model using the .m file and it seems to be able to do everything including the postprocessing but amazingly I can't seem to find an option to simply output the data to a txt...
View ArticlePiezoresistive Coefficients
Hi I want to find out the sensitivity of my piezoresitive cantilver beam. In order to do that, based on the equations, I should have the piezoresistive coefficient (Pi-1): Delta-R/R=(PI-1)*maximum...
View Articleerror geometry
what is this error!? please hepl me Failed to evaluate variable. - Variable: mod1.spf.T_stressx - Geometry: 1 - Boundary: 1645 1646 1647 ... 4656 Failed to evaluate expression. - Expression:...
View ArticleColors messed up when exporting GIF
Hello, When I export a GIF from COMSOL, often times the color scheme will be all messed up. Instead of a fluid change from blue to red, I will see about 16 distinct colors. This looks terrible and is...
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