Acoustic 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 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...
View ArticleCoordinate system and COMSOL solver
Hi This may sound silly but I need to understand the basics. I am bit confused about how COMSOL handles coordinates. I have a circular geometry in 3D, preferably in theory it is usual to use a...
View Articleplease help me how to eliminate the perspective effect .... how do you...
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View ArticleCapacitive pressure sensor
Hi, i'm currently using the version 4.2a. i'm trying to model a capacitive pressure sensor. i downloaded a capactive pressure sensor from comsol website (for version 4.3) and it is working fine. in...
View Articleuse of composite beam for detection of load
Hi, In my project i am using a composite cantilever beam of SILICON & GOLD. Now i am trying to calculate the deflection in the cantilever analytically when a load is applied on it. For this first i...
View ArticleHow to simulate two physics field: e.g. Solid Mechanics and Electrostatics
Hi , I have a simulation about two physics field, that is, solid mechanics and electrostatics. In my model, there are two parallel plates. I give a force or pressure on one plate, then caculate the...
View ArticleConvert 2D to 3D
Hi, I imported an on chip inductor that I draw in Layout Cadence (Format *.gds). The inductor is in 2D and I want to convert it on 3D in COMSOl so I can go further with my work.. How can I do this in...
View Articlefield distribution
i design a insulator it get meshed but when i give study i show the which i design please tell what mistake i done and there is no error message in display.
View Articleerror in impedance calculation of multi-turn domain
Hello, I would like to calculate the impedance of a coil in a 3d model. For that I solve the problem in the frequency domain for several relatively low frequencies. I therefore can neglect the skin...
View Articletwo phase flow combined with porous media
Hi I have a 3D model of a DMFC channel. The physics associated with this channel are: 1. Secondary current distribution Cathode side: 2. Transport of concentrated species 3. Free and porous media flow...
View ArticleTemperature 3D Plot - Conversion Colour into Z-Coordinate
Hi. Maybe this is a simple problem, maybe not. My question is, I want to change my 3D plot with colour scaled temperature as the fourth dimension into a 3D plot while using a plane through my...
View Articleplease tell me how to use the CAD live link program...?
I installed the auto CAD2014 Program after installed the comsol 4.3b So, I don't use the CAD live link... I wish to use the cap faces function but I don't use it .. help me
View ArticleLight Bulb Problem with a twist
Hi all, We don't currently have the heat transfer module, which we are talking about getting. We have a problem very similiar to the light bulb tutorial model. However we would need the argon pressure...
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