Excavation process - time dependent
Hi, I am trying to model a real-time excavation of a borehole. Assuming that at the time t = 0, the drilling begins and at time t = 1 day, the tunnel advancement is 1 m (drilling velocity = 1m/day)....
View ArticleHow to make sure AC/DC and Structural models are coupled? SIMULATION ATTACHED
I'm doing my thesis on the magneto-mechanical coupled analysis. The attached file is only a simple example showing what I want to do about magneto-mechanical coupling. I chose to use the AC/DC model,...
View ArticleRigid connector equivalent in 4.2a
Good day i am using version 4.2a but the tutorial i am using is for 4.3 and it says to find a rigid connector in solid mechanics. I need to apply a torque to a fillet bar,what is the equivalent function?.
View ArticleCan I use "soil plasticity" in the poroelasticity module?
Can I use "soil plasticity" in the poroelasticity module? Because I want to consider plastic behavior of soil when I am using poroelasticity module.
View ArticleHow to see the plots after running in batch mode?
Hello! I managed to get comsol to run in batch mode (Linux). However, after I open my newly created output model file out.mph, I do not see any graphs available. I am solely interested in CFD module,...
View ArticleElectrical Circuit and Comsoll
Dear memebers I Work with Comsol 4.3 ACDC. I know now how to import a SPICE Netlist to Comsol.But I still have a problem. I followed the exmaple in ACDC modul called "inductor in a Circuit". So to be...
View ArticleTemperature effect in Electrostatic module.
Hi, I am using Comsol ver 3.5a. Can anyone guide me that how could i observe the effect of temperature on capacitance value in Electrostatic module ? From where i can change/control the temperature in...
View Article[Batch Run on Linux Cluster Problem]
Hello, I am currently trying to run COMSOL/4.3a in batch mode on our university cluster. I am able to submit the job and pull it back after computation. However, although the size of the *.mph has...
View ArticleHow to 'fill' the space between two parametric curves.
Good morning, I'm trying to make an S shape drawing to my model that consists in two rectangles and 4 parametric curves ( forming 2 semi-circles). But when I make the extrusion the parametric part of...
View Articleheat exchanger
Hi Im trying to model a heat exchanger under Conjugate Heat Transfer module but i got an error. I attached the file. Would you please look at it and let me know where is my problem? Regards
View ArticleSliding boundary conditions in Solid Mechanics
Hi! I am trying to model a sliding boundary condition between to elastic bodies. By sliding condition here I mean, that the DIFFERENCE between the displacement fileds should always be zero in the...
View ArticleDifference Between Fixed Constraint and Rigid Connector .
Whats the difference between fixed constraint and rigid connector ?? I'm trying to simulate a Frequency Response Analysis on a Aluminum Box that has a 'shaker' on it's lid and the lid is fixed to an...
View ArticlePolynomial Issue with User-defined Variables
I have a 2D rectangular geometry that has porosity and permeability values dependent on x-coordinate. Polynomial expressions are used to define the local porosity and permeability. However, COMSOL does...
View ArticlePML for infinite layered films
Dear folks, I am trying to simulate a point source illuminating on a stacked films extending to infinite. A intuitive way to truncate the film, I think, is to use PML. However, when extending the...
View ArticleUse eigenfrequency found in study 1 as a parameter in study 2
Hello all, My simulation is divided into 2 studies: Study 1: Eigenfrequency (model: solid1) Study 2: Frequency domain (model: solid2) Have you an idea how to use one of the eigenfrequencies found in...
View ArticleWhat COMSOL Module is Needed for a "fluid-structure interaction" model?
Just a quick question here... What COMSOL Module is Needed for a "fluid-structure interaction" model? Can one perform this is the "Microfluidics Module"? Or, does one need the "Structural Mechanics...
View ArticleInitial Concentration in Reacting Flow in Porous Media
Hello, I need to know if I can add a starting concentration for a variable in the Reacting Flow in Porous Media, that will then change via the Reactions Node. The Initial Values Node does not seem to...
View ArticleHow to draw Bezier curve
HI All Can any body suggest me how to draw bezier curve in 2D.
View Articleexport as _real_ vector graphic
Hi, I'm not satisfied at all with the image export capabilities of COMSOL. I just want to have real vector graphics. There is a possibilty to export graphics as vector graphics (eps-file), but this is...
View ArticleInstallation problems on Ubuntu 11.04: Failed to load libjvm.so
Hi, I have problems installing COMSOL 4.2a under Linux. I mounted the .iso file as indicated, but when i run setup, i get the following error message: Failed to load the JNI shared library...
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