How to couple turbulent flow and porous flow?
Hi, I want to calculate the compressible & turbulent flow and heat transfer in porous media. Here I have two questions. 1. How to couple the turbulent flow and porous flow? 2. I want to consider...
View ArticlePlastic strain
Hi! I'm playing with plastic strain dependent on the stress level. I have problem, when stress level goes down at the same time plastic strain is going down. So i have question for you. How to define...
View Articlecoil design
Hello, I work on a cold crucible magnetic modelisation with the mf physic around 10 kHz. I want to design a 2 turns coil according to the real geometry (with little simplifications). I start with a 3D...
View ArticleElectric Field
Where can I get a tutorial about how to simulate a electric field with some geometries, I am new in comsol thank you
View Articlevibration of film,model by Structural Mechanics
Recently, I model vibration of film, because I want to compare the Eigenfrequency of 3D and 2D, my model is Structural Mechanics, not Shell or membrane; I find the mesh affects the solution result, the...
View Articletemperature, pressure and field distribution
Hi all, I've designed string insulator using comsol multiphysics 4.3 (3D) i've formed a cylinder around the insulator model as a air medium and i've given the conductivity and permittivity values. But...
View Articlecorona discharge
sir/madam, how to design corona ring and fix to electrical insulator,please give me immediate answer
View ArticleError "out of memory during LU factorization" in Modeling the adsorption of...
Hi, My project is 'Modeling the electrosorption'.I tried to model adsorption of ions(Na+,Cl-) on electrodes due to applied electric field.I model using Poisson Nernst Planck equation which is made up...
View ArticleMode selection
Hi all. Does anybody know if there is a way to select special modes after eigenvalue solver? For example I need only high-Q modes or modes that have some integral value positive and so on, but the...
View ArticleIs it possible to use a pulse voltage in the "Electrodeposition" module?
I'm using "Electrodeposition" module right now. Instead of Direct-Current power supply, I want to use a pulse power supply in the simulation. Is this possible in the "Electrodeposition" module?
View ArticleAcoustic Band Structure of Metamaterials
Hi folks, I have been trying to find the band structure of an acoustic metamaterial. I have been attempting to adapt the "Bandgap analysis of Photonic Crystal" tutorial given for COMSOL 3.5a to 4.3. I...
View ArticleLoad or Temperature Assignment to Nodes
Hi All, I utilize Livelink Matlab to solve a multiphysics problem. First of all, my Comsol model solves film pressure on a surface. Then, I extract the pressure distribution and film thickness of a...
View Articleoutlet&outflow conditions
Hi, First of all , I have internal 3D Laminar flow through duct . My question is how does the COMSOL handle the zero outlet pressure condition? It seems that COMSOL assumes linear pressure drop when...
View Articlecoordinate system confusion
Hello, I have a 3D time-dependent diffusion model that I have built. This is a cylinderical geometry with diffusion of a substance taking place from the center of the cylinder to the outside. I tried...
View ArticleConstruction sequence - tunnel
Hi everybody! I'm playing with tunnel construction process. Mainly, construction process can be divided into two repeatable steps: 1. excavation 2. lining installation I'm modelling construction of...
View Articlehow to simulate transient response of change in atmospheric pressure through...
I am trying to simulate the ear canal of a pilot as he flies a plane to a high altitude. To simplify this problem (to atleast get the physics rite; I can add the complexities of the geometry,ect at a...
View ArticleSkip unsolvable parameters in parametric sweep?
General question. I run a parametric sweep and occasionally one of the parameters causes a simulation that doesn't converge. e.g. the parameters are param = 1, 2, 3, 4, 5 meters and this simulation...
View ArticleWhat is convergence?
I'd just like to know what convergence is - in the context of COMSOL.
View Articleplease help me how to eliminate the perspective effect .... how do you...
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View ArticleTorque application to a cylinder (circular or square cross section)
I have been been trying to torque a cylinder, with square or circular cross section, through methods mentioned in the previous threads. However, all the methods are leading to a radial expansion of the...
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