a cantilever beam 50 mm immersed in liquid
i want to extract the frequencies of a cantilever beam of length 300 mm and immersed in liquid the one sixth part of the cantilever length but when i excute the compute in comsol multiphysics it...
View Articledipole moment calculation issue
Hi I have used electric current physics in AC/DC module to compute dipole moment of a spherical dielectric particle in external E field. Once I determined the type of particles and medium and their...
View ArticleDefining Electric Field with X or Y polarization in 2-D axisymmetric case in...
HiI was using the 2-D axisymmetric electromagnetic module to simulate a 3-D case. I can see that all fields are defined as Er, Ephi, Ez in this axisymmetric case in both "port" and "electric field". I...
View ArticlePiecewise funtion to determine voltage pulse
Hello all,I have a simple thermoelectric simulation I want to run. I want to create a voltage pulse across a coil and calculate the coil temp over time. I cannot define my piecewise voltage function...
View ArticleVariable
I want to creat a temperature dependent variable for reaction module. Could anyone please guide me?
View ArticleHow to simulate flow with really close multiple rotating parts
Hi !I want to simulate the gas flow inside a non-existing rotary engine. Please see the picture for better understanding.It has 3 rotors, where the central one has teeth-like parts that compress the...
View ArticleGeneral
Dear all,I am trying to simulate a droplet breakup with a level set model , as a part of my project. I have used capillary number and initial length for giving the boundary condition at the inlet. I...
View ArticleGradient in axisymmetric mode
Hello, I'm solving Heat Transfer in 2D axisymmetric space dimension. I want to export gradient of temperature in cartesian coordinate system. So I tried to write Tx, d(T, x), d(T, X), it didn't work...
View ArticleFrequency domain prescribed velocity profile
Hi, I have a model that I have investigated previous by using the velocity of the vibrating surface for excitation (determined experimentally) to view the sound pressure directivity both near and far...
View ArticleUsing Non-Spherical Particles in Particle Tracing
Hello All,Is there any way to change the shape of the particles in the various Particle Tracing modules? I am trying to model the flow of cylindrical and disc shaped particles. I want to examine their...
View ArticleFlow through metal grate
Hi all,I do not have much experience in CFD simulation.I would like you to clarify to me about the simulation of flow through metal grates. I read some scientific articles on this type of simulation,...
View ArticleSimulating Ice Melting from -20 degC to room temperature 25 degC in a tank...
I would like to simulate the metling dynamics of ice in a tank under environmental vibration (eg. 2 Hz, 1 g).I need to consider the phase change process and also the free convection in the situation...
View ArticleMaximum deformation expression
I want to apply inequality constraints for optimization module that max deformation of component is smaller than 1mm.So I need expression for max deformation.How can I express that?
View ArticleAcceleration time history data for seismic analysis
Hi all,Can somebody explain how to apply acceleration time history load for seismic analysis of buildings?
View ArticleBuried pipeline (Beam embedded in solid)
Hi,I am trying to model a pipeline buried in sand. Elastic properties of the sand is assumed.I was able to do this succesfully using shell-solid as shown in the attached file "Buried pipe...
View ArticleInterface font size
Dear all,Is it possible to increase the font size of the interface on screen (I am using a MacOS)? The default is very small...Thank you Francesca
View ArticleUnknown Variable Error in a Multi-physics Model
Hi,I have defined the Young's modulus as a piece wise function in the global variables. (Function name pw1 and Argument p). But when it is called for, under the Linear Elastic Material node of the...
View ArticleHow to create uneven surfaces?
I want to draw a kind of cube, with the top face with the topography and different internal layers that divide the cube into the different rock layers of the subsoil. I have already placed the...
View ArticleError in the number of arguments in the analytic functions
I am trying to model the heat transfer through a laser cavity by a pulsed pump laser with arguments in both space (r) and time (t). I have set up my analytic functions with both arguments defined and...
View ArticleCoupling of two physics
Hi I made two models seperately and then assembled them. First model uses "Coefficient form PDE" and second model uses "particle tracing module and Electrostatics module". I want to couple them such...
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