Anybody solve my problem about Heat transfer
Hello, I'm mechanical engineering Sudent.I'm faced with a problem about Heat transfer. water domain(4) has problem in computing as like stiky note. MPH file is so huge(91MB) that if comment your...
View Articlepiezoelectric energy harvester
Hello everyone I am working on the Piezoelectric energy harvester. In my model, I have two PZTs connecting in an opposite direction. I am applying force on the first PZT so it will deflect and strikes...
View ArticleDilute Species Model, inputting species as ppm or percentages
Hi,I'm working on a deactavation model for a DOC catalyst in Comsol 5.3a. The data I have been able to source form literature is all in ppm or percenatges, and Comsol will only allow inputs in mol/m^3....
View ArticleHow to make circular rings in COMSOL Multiphysics 5.4
Hello, I am fairly new to COMSOL Multiphysics and I am trying to build a capacitor enclosed by a series of circular rings in 3D.I have attempted it by building a series of helixes with 1 turn along...
View ArticleNavier Stokes (2D flow between parallel plates) using coefficient form PDE
The below post is related to an archived discussionHello,I am trying to simulate incompressible flow between parallel plates by using the coefficient form pde, in order to get hang of modelling using...
View ArticleHow to duplicate models efficiently
Hello, I am new to using COMSOL Multiphysics and Livelink and I was wondering if there are any time efficient way to create a series of duplicated models in geometry.I would like to find a way to...
View Articleelectric field simulation
Hiim trying to create a plot of electric field but only get the electric potential plot.i would like to look for your advice since i need this simulation to be done ASAP.Looking forward for your reply,...
View ArticleQuestion about import external data in cylindrical coordinate system?
Hi all,My geometry is a cylinder and I intend to import external heat source data to it.The external data table in .csv file has 4 columns, for example: r(cm) fai(rad) z(cm) power(w/cm3) 1 -3.14 0 10 2...
View ArticleSpecifying Gravity in Free and porous media flow
Hi, I am trying to simulating a drop which gets dropped from some height onto a porous media. I can't seem to get the option to specify gravity in the free flow portion of my simulation. The physics...
View ArticleHeat transfer module
Good day everyone,I am currently working on a heat transfer problem in COMSOL. Here is my problem:https://www.engineersedge.com/heat_transfer/conductive_heat_transfer_pipe_13841.htmBasically, in my...
View ArticleHow to define the integration of electrical resistance
how to integrate the electrical resistance of a thermoelectric generator with a trapezoidal shape in the case of 3D simulation
View Articledefine a raster scan beam
HI,I would like to have a raster scanning beam in a certian area of a domain (top surface). I find a moving laser in aplication module, but I could not extend it to a raster scan beam.is there anyone...
View ArticleBioheat Transfer Configuration
I'm trying to simulate the temperature change due to the microwave heat source (antenna) in a specific point located in muscle tissue as it shown in the attached picture. In order to do that, I am...
View ArticleShell and Tube Heat Exchanger Model problem
Hi,I want to model shell and tube heat exchanger and I have been following the tutorials from the COMSOL itself. But then, I have different geometry, and different number of tubes.Due to this...
View ArticleImport exrernal data problem
Hi，My external data contains 4 columns, which are radius,degree,height and power, namely: R(cm), fai(rad), z(m), power(W/cm3)The external data are got in cylindrical coordinate by another program.I...
View Articleacoustic-structure interaction using form assembly
Hi In my model, the structure domain is immersed in a air domain. Usaually we will use form union at the end of the geometry. But for some reason, I need to use form assembly at the end to modify the...
View ArticleFluid flow simulation hanging (5.3)
Hello everyone,I am new to COMSOL, and I'm trying to model fluid flow over a sphere. For some reason, I keep getting the following error:Failed to find a solution. Maximum number of Newton iterations...
View ArticleThe Physical adsorption process for porous media in the model
Recently, I am working on a model for the suspension to flow through a porous medium to describe its adsorption process. Does the porous medium need to be modeled? Can the physical adsorption process...
View Articlehow to couple three phase module with transport of diluted species?
Hi,I want to simulate the mixing of two different droplets in a microchannel with another carrier fluid. two droplets are comming from two inlets and in the middle of channel will coalescense and...
View ArticlePhase change temperature does not have an influence
Hello,I am relatively new to Comsol and trying for a while now to simulate the influence of phase change materials on the temperature of a room. The simulation is only based on a heat transfer in...
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