Heat conduction in solids - temperature dependent heat transfer coefficient
Hi, I would like to solve a simple heat conduction in solids problem with a temperature-dependent heat transfer coefficient at one of the boundaries h(T) = 1000*(300/T)^1.3 However, the result computed...
View ArticleContinuing Modeling Issues with 2D & 3D piezoelectric SAW model
Hello all, I’m in desperate need of help with my model. The initial model setup is a 2D cross-sectional SAW device where I have silicon, a metallic electrode as my ground, a buffer layer, a...
View ArticlePlotting the gap distance variable
I am trying to do something very simple, but it doesn't seem to be intuitive. I have a contact pair in the structural mechanics module and I want to plot the gap distance variable as a function of...
View Articlemagnetic shielding with mumetal(nonlinear - saturation)
Hi I need some help with my model.... I have a 3D sim, A current line that generates my field and a mumetal infinite plane(1m*1m*0.5mm) The 0.5mm is the thickness of my mumetal. I have 0.5T on the...
View ArticleCalling variable or convert T(x,y,z) = >T(x,y,t) between models
Hi: Please help! I'm very stuck with a quite straightforward problem. I've got two models: 1) Model 1: 3D Heat Transfer Stationary 2) Model 2: 2D Teat Transfer Time Dependent. How can I call T(x,y,z)...
View ArticleHow to set displacement from study 1 as prescribed displacement in study 2?
Hey, I have a trouble with defining a prescribed displacement. Let's say that i received displacement of the edge caused by heating of sample. But displacement of this edge is different in every point...
View Articleeddy current
how to get the imaginary component (phase) in the inductor in the high-frequency alternating magnetic field? Comsol 4.2a Help me please
View ArticleLocal maxima of solution
Dear all, I use comsol to solving a certain EDP problem (Laplace equation for exemple in crown domain: 2D or 3D domain). The solution is noted 'u'. I want to calculate the all local maxima of the...
View ArticleHow different are these?
Hi, i am a student in republic of korea. My model is to observe how E-field enhancement is made by constructing nano gold patterns on a slica galss, applying incident laser from z-axis. However, I have...
View Article"No frame is defined for 0D applications"
Hello again. I am trying to simulate an E-core transformer. When I click the study 1 and select the show default solver there is an error occurs "No frame is defined for 0D applications" . What is it...
View ArticleElectromagnetic actuator
I have problem with coupling the magnetic that generated by 2D Coil with permanent magnate to actuate the cantilever beam. Also, I have faced problem to specify the boundary of moving mesh that is...
View ArticleInduction heating 2D with magnetic flux concentrator (MFC)
Hi all, I have some problem with an induction heating simulation which has a magnetic flux concentrator (a material with a really high relative permeability) in it. As a result, the metal plate heat up...
View Article"Nonsymmetric matrix found" error and meshing
Hello, 1 - I'm simulating a Newtonian incompressible fluid flow in a porous medium (medium formed by 1000 solid grains). For a mesh of 124816 elements, the computation runs normally and I get results....
View ArticleInduced current/voltage from one coil in another
Dear community, I just started to use COMSOL. Now, I'm trying to model two cylindrical coils with different radius but at the same position (also same length and thickness). I'd like to apply a...
View ArticleTroubles with reading COMSOL text data files and files with interpolation...
Hello everyone! I have some troubles with creating my own reader for COMSOL text data files and files with interpolation functions. I have read "The COMSOL File Formats" section of...
View ArticleCAD data for KEMAR
Hello. I have seen papers with scans of the KEMAR manikin, such as from Mads Jensen when he was at Widex. I am in need of CAD data (e.g. STEP file) for the KEMAR head. Does anyone have such data? Would...
View Articlecalculating average element size
Hi, I am trying to characteise the effect of mesh quality and element size on the solution of a model. I have generated a standard and several refined meshes using an external software (Simpleware) and...
View ArticleHeat Transfer in Soils
Hi, I am a comsol user and I want to have a 2d axisymmetric model. In my model, I have a soil sample that I put a steel bar in the soil. I want to heat the steel bar with a constant temperature 500(k)...
View ArticleImporting real data heat flux boundary condition to COMSOL
Hello all, I'm working on a 2D transient heat transfer project and I can't figure out how to import real data for heat flux vs.time in COMSOL. It only allow me to input a fix value or function, not...
View Article2D hinge in compliant mechanism
Hi all, I am trying to simulate a compliant mechanism as seen in the attached picture but I am having difficulties simulating the rotating pin in 2D. As see in the picture the structure is composed of...
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