Importing a file from AutoCAD to COMSOL
I have created a 3D building model on AutoCAD and wish to import it to COMSOL for CFD analysis. Can I know the process for importing?
View ArticleIce melting
Hello, I am new to comsol and i am using comsol 4.2a. I have to create a model for melting ice on steel block of dimensions 0.1 X 0.1 m. This steel block is placed over a slab of dimensions 0.3 x 0.5m....
View ArticleUnexpected results with "Ground" BC
Hello, I do most of my modelling using electrostatics steady-state solutions. One thing that comes up in my models alot is a grounded metal object in a linear, vertical electric field as shown in the...
View Articlepost-processing (plotting)
hello, after a biphasic flow simulation "drop flows in other fluid" i hoped plotting my results, but i could not, beacause what i wanna draw it's a user difined characteristic, and i don't know how to...
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 ArticleTwo interdependent studies - but I cannot use results from frequency domain...
Dear all, How can I use the result from a parametric (parameter 'b') sweep-frequency domain study (e.g. emw.Ez(b) ) in another function defined under Definitions (e.g. f(emw.Ez(b)) ) which is used as...
View ArticleRadiation in conjugate heat transfer
Hello all, I have the CFD module and am using conjugate heat transfer. This means that I don't have surface to surface radiation but I do however have surface to ambient radiation. I am modelling...
View ArticleDiamond Young's Modolus Property confusion
Hi Comsol Community, the Young's modulus property of diamond in the Comsol material library is 105 x 10^9 Pascal whereas the proper property value in literature is an order of magnitude larger: 1220 x...
View ArticleHow to implement Valveless Piezoelectric Micropump
hello everyone. Is there any way to have a hold on the model presented in this paper for a piezoelectric micropump?"Design and Simulation of Valveless Piezoelectric Micropump" I have difficulty linking...
View Articlea question of memoy
Hi! I have one question about memory！ My computer have 90G Memory and 12 CPU，when compute the case，maxium 12G used，still have 78G memory is not occupied，my version is 4.3, win7 64bit；how can i fully...
View ArticleProblems with results of simulation in a range of frecuencies and a specific...
I am tried to simulate the microwaves propagation in a waveguide transition of rectangular to circular. The problem is the following: when I perform the simulation in a range of frecuency, the obtained...
View ArticleComsol PDE coefficient form
hello everyone, do you know what's the form of the matrix "C" to make the two expressions equal? (see the attached picture, "u" is a three componet vector). Tanks for your help.
View Article2D Model Problem...
Hi all, I'm working on a model which is a 2D representation of a solid container in a multiphase-flow section. what I'm trying to model is to study the relation between the contact angle and the ratio...
View Articleerror: The object 'Type: Save Point Geometry Tag: geom1' is not contained in...
Hi all- I have been working on a model for some time, and just trying to optimize the solver settings. I saved the model today, and then opened it up again to work on it, and now get this error for any...
View ArticleOne way multiphysics coupling within a transient simulation
Hello Fellow Users, I am solving two physics (fluid flow & species transport) in a transient simulation. The fluid flow is not affected by the concentration distribution. As of now, i have...
View ArticleIssue with temperature distribution
I am using COMSOL for simulating heat generated by current through a metal bar for my 3rd year dissertation project. I am having an issue with the output following the simulation. I have applied a...
View Articlesave the mesh points into a text file
How can I save the mesh points into a text file or some similar? Thanks!
View ArticleIssue importing ipt files from Inventor with the CAD module
Hi, I can't seem to import a simple IPT cad file (that has a helix built in) from inventor, the import module gives me an error back saying: Not a valid ENTITY type for this operation - Detail:...
View ArticleScattering boundary conditons for non-normal incident
Hi all, I'm wondering, if it possible to use the scattering boundary conditions in the RF module to make a boundary transparent for a plane wave with a known wave-vector (which is different from the...
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