laminar flow in tube
Hi iam new to COMSOL i want to design flow in tube and valve to obstruct in the end. By changing the valve positining i want to simulate the strain distribution on the surface of cylinder(tube) can...
View ArticleSeparating mesh of sub-domains
Hello every one i made a model when has 3 sub domains, i want to export the total Mesh of my mode. file->export->Mesh to file and saved. this file includes the node and element information of...
View ArticleDefining the outflow boundary condition for PDE interface
Hi, I am modeling species flow and transport in fracture-matrix system. Fracture is a thin space on left-side with connected matrix on the right-side. Dissolved species in water enter at inlet of the...
View ArticleSuperfilling only inside the trench
I need to modify the COMSOL 4.3 "Superfilling" verification model (provided in the Electrodeposition examples), in such a way as to consider only the inside walls (two vertical and one horizontal in...
View ArticleThin Thermally Resistive Layer on top of Boundary Heat Source
Hello everybody, I want to simulate a flat mikroheater on top of a foil that is covered by a liquid. Since the foil has a thickness of about 100µm and the liquid covering the heater has a height of...
View ArticleTwo solids in contact with relative movement
Hi I was wondering if there are any comments on the problem that I am working on it at the moment. Basically, consider two solid cylinders (like piston and cylinder) that the first one is moving inside...
View ArticleAlkali Silica Reaction (concrete)
Hi there, I am new to Comsol Multi-physics I was wondering if you could help me to model a concrete ASR chemical reaction. Any Ideas please write a post. Regards
View ArticleDoubts with induction heating
Hi, i'm designing an induction heating system applied for an FDM (Fused deposition modeling) extruder for my final proyect. I started using a ferritic stainless steel (430), which has a relative...
View ArticleWorking with tutorial Sliding Wedge
Im working with the tutorial Sliding Wedge, a warning in my resolution said: In segregated group 1: There was an error message from the linear solver. The relative error (0.0061) is greater than the...
View ArticleMesh Resolution Investigation
Hello I wanna check mesh convergence in my simulation. I make the maximum mesh size half in each time. Am I right or I need to make the number of elements half? Is the any relation between the number...
View ArticleWho has Comsol model of the Modeling Hysteresis Effects
HI everyone, I have a tutorial on Modeling Hysteresis Effects (in Comsol 3.5). Currently, I need this model for reference of hysteresis loss analysis. Anyone who has this please share the model here?...
View ArticleHow can I export an eps image (vector graphics)?
Hello, I would like to export an image of the model geometry as an .eps file (vector graphics). I could not find how to do that and it seems that the only options are jpg, png and bmp. Thank you.
View ArticleEvaluate the electrical voltage from the magnetic field (mf) physic
Hi ! I need to calculate the electrical voltage of an electric conductor subdued to a magnetic field. The conductor is excited by a current density using magnetic field physic (mf). I want to simulate...
View ArticleRecreating Jet Flow in COMSOL
I have temporal and spatial velocity profiles that I would like to try and recreate in COMSOL. At 0mm from the nozzle (d = 2.4 mm) the velocity is 110 m/s and at 12 mm the velocity is about 100 m/s. It...
View ArticleFluid flow with a moving solid object/hole
Hello, I would like to model the airflow in a room occupied with people, and to allow the people (cylinders) to move around in the room. Is this possible in COMSOL? For a silly example in 2D: I have a...
View ArticleCOMSOL APPCRASH and closed
hi I have a problem for the new server computer using COMSOL 4.3 First of all, the performance of server computer is below. OS: windows 2008 server RAM: 512GB CPU: AMD 6238 (x4) GPU: Geforce GTX 550 Ti...
View Articlemode analysis of a waveguide
Dear all, I'm trying to reproduce the results which is on www.comsol.com/cd/direct/conf/.../11847_frezza_presentation.pdf (Comsol conference 2011, page 7, symmetric case, neff). Could you let me know...
View ArticleModeling rigid components
Hello, I am working on a contact model where one object is much stiffer than the other. In other modeling programs I have used it is possible to assume the very stiff surface is infinitely rigid...
View ArticleLarge Deformation Analysis- Convergence Problem
Hi All, I encounter a convergence problem in my COMSOL model. It is greatly appreciated if someone help me to solve this problem. As you can see in the attached model, I am modelling a cartilage using...
View ArticleFailed to evaluate variable. - Variable: mwp.V0 1 - Global scope
Hello dear Comsoler, dc.cir1.R1_i is something like in the dc module the current through R1 of circuit1... I can somehow find out what the variable name is... but what when there is a space between the...
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