surface to surface radiation without surface
Hello, I work on a molten charge and i have some issues with radiation. Usually i use a surface to ambient radiation condition but it is not enough precise for my problem, i have to take into account...
View Articlehelp internal parser error
Hi, it appears an error that says "internal parser error" when I write " 0.01[Pa·s] " in Global Definitions->Parameters. It has something to do with the viscosity units. Could anyone help me? Thanks...
View Articlemoving projectile-railgun
Hi The following linkwww.comsol.com/stories/cote_railgun/full/ describes a model with a moving domain. Does anyone have the paper or model file or maybe knows some detail, which modules were used, in...
View Articlerf mems switch
can anybody upload a .mph file of rf mems switch ? i am new to Comsol. and ii want to study a movement of mems switch on this s/w.
View Articleabsorbing boundary condition for heat transfer problem
Hi, can I give a absorbing boundary condition for a transient heat transfer problem. This is to avoid the heat wave reflecting at the boundary and contributing to the temperature rise. Can someone help?
View ArticleImported SolidWorks part doesn't behave correctly
I'm relatively new to COMSOL but I haven't had much luck finding a solution. I had an assembly in SolidWorks made of 3 parts. I created a new SolidWorks part file which had the 3 parts mated together...
View Articleharmonic perturbation
I have a question about harmonic perturbation I assigned a 1 A current to a cylinder in mf physics using multi-turn coil and solved it with a 60Hz frequency using frequency domain. If I assign 0.1 A to...
View ArticleForced Vibration of Vertical Simply Supported Beam with 'Overhang'
Hi, I'm trying to simulate the forced vibration of a beam that stands vertical and is supported by two simple supports that are shaken back and forth by a motor as in the attached schematic. I've also...
View ArticlePML Scaling factor in COMSOL 4.3
Hi, I am doing a 3D simulation with COMSOL 4.3 to find the field distribution and the mode of a waveguide where all the cladding, the core and the substrate have different refractive index. I have...
View ArticleVibrating horizontal plate.
Good Evening everyone, I have a really simple question, I'm sure someone knows the answer to my problem. I'm trying to make a model of a plate, platform, anything you want to call it, that vibrates...
View Articlemagnetic forces direction in post-processing
Hi all, I have made a 2D simulation for the stress distribution due to magnetic forces in a synchronous reluctant machine, I want to show how the forces act on the boundaries of the stator teeth and...
View ArticleApplying time derivative as a dirchlet boundary condition
Hi, I need to apply the time derivative of a displacement created in a piezomaterial as the velocity for a fluid boundary..... Could someone please let me know as to how this can be handled in...
View ArticleHow to save a solution
Hello , I have a question about how to save a Comsol solution. I did a model in Comsol 4.2 , after 31hs I got a solution , I saved the model but when I opened it again the solution was not there , so I...
View ArticleInitially Stressed Bimorph Beam - Electrostatic Actuation
Dear All, I am attempting to model a bimorph which naturally deflects upwards due to stress in the lower layer of the beam. So far, this part has been successful. The top of the bimorph is silicon, and...
View ArticleSolving Time dependent problem with stationary solver at the same time.
Hi, I am trying to simulate a brushless DC motor. I want to make comsol to solve the problem in the form of time dependent. However, during each time step, comsol should solve and obtain a stationary...
View ArticleCalling all electrochemical enthusiasts - March courses on Electrodeposition...
Join us this March for our special courses focused solely on electrochemical applications. First, we will be offering our popular Electrodeposition course where we will cover electrode kinetics, the...
View Articlethe electric potential dependent on temperature
hello, please help me i am trying to make a model of an electrode in a cylinder of biological tissue, i want to make the electric potential on the electrode dependent on the temperature of the tissue,...
View ArticleError: The file position must be a positive integer
Hello, I am going through the SAR in human head example provided. Everything is completed as per the tutorial. I am trying to solve now. However, I get this error: ==================================...
View ArticleMovement of air due to thermal expansion
Hi everybody! I'm trying to simulate the movement of the air in 2D and I only get errors. I use two physics: laminar flow with heat transfer. I've created a square full of air and I put easy boundary...
View ArticleAccessing the outlet value to apply in the inlet boundary
Hi. I need to set up the inlet boundary condition (temperature) in the conjugate heat transfer analysis with larminar flow. However T of inlet (fluid) should be like this: Tin = Tout + 3 K (at every...
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