Externally vibrating Channel
Hi; I am a new user of COMSOL and I need a little help. I want to create a vibrating microchannel but I couldn't figure out how to give external vibration to whole channel. Moreover, I want to examine...
View Articlefluid flow through a membrane with many pores
Hi, I want to simulate the fluid flow through a membrane (~ 1 um thickness) with 20 um dimatere pores. When I want to do 3D simulation and choosing the membrane area of 1*1 cm with high density of...
View ArticleClik here to view.
Modelling a chemical reaction reactor
Does anyone know why the results are Wavy lines? I think the correct results should be Smooth curve.
View ArticleHow to apply temperature continuity condition between the wall of a reactor...
Hi ,does anyone can help me? I want to konw how to apply temperature continuity condition between the wall of a reactor and the Heat Transfer Fluid? I am currently try to simulate a reactor , heat...
View ArticleThe definition of material overriden in pm_motor
Dear all, I am simulating a motor. While I defined the materials of different domains. In material>>air, I found the domains of magnet are covered by the air domain. The pic I uploaded is the...
View ArticleTotal reflection in a 2D double bent waveguide
Hi, I'm trying to simulate total light reflection in a SU-8 waveguide (refractive index 1.6, exterior domain: air) structured by a first straight section split into two symmetrical S-shaped bends...
View ArticleHow to extract displacement distribution line profiles from plots of resonant...
I am using the acoustic module to simulate vibration modes of a cylindrical rod. Now I would like to draw a line parallel to the cylinder axis to indicate displacement distribution on the surface when...
View ArticleDifferential (multielement) lumped ports in RF module
Hello,I am using the differential (multielement Lumped ports) ports of the RF module to run an S-parameter analysis on a couple of differentiaol traces on a PCB.Under Settings the reference...
View ArticleFix the 4 corners of a beam to use shape optimization
Hello,I need to fix the 4 cornes of a beam and optimize just de top and bottom edges. Can someone help me?!!Thankss!
View ArticleDivision by zero error
Hello. I try to model He-Ne plasma. And during the calculation I received the following error:Division by zero. - Function: / Failed to evaluate temporary symbolic derivative variable. - Variable:...
View ArticlePiezoelectric Coupled With A Shunt Circuit For Vibration Damping
Hi, I have been using comsol to study topics related to piezoelectric materials. I'm modelling a beam with a piezo attached on the top, and an electrical circuit attached to the patch: to do so I used...
View ArticleMesh size changes results with dipole
I've been working to model NIR waveguiding of a thin film on silicon. To implement this, I've created 2D models of an air gap followed by a thin dielectric film on a silicon wafer in the wave optics...
View ArticlePhase of S-Parameters
What exactly are the S-Parameters in Comsol? In my opinion, the S-Parameters (S11, S21, etc.) are normally defined as S11=reflected field over incident field and S21=transmitted field over incident...
View ArticleCalorimeter Method
Hello everyone, I'm in need of some help with my project task regarding the calorimeter method where I have to create some sort of example in COMSOL program before creating one piece by piece. If you...
View ArticlePhase Change - liquid to vapor
Hi,I am interested in studying to model the phase change of liquid water to vapor by heating the downside of a cup (in 2D), like it is shown in the attachment.To model this, I selected two materials:...
View ArticleFlattened Lens based on quasi-conformal mapping
I want to obtain the 2D flattened lens similar to the following link. I applied the boundary conditions, but the obtained meshes are not orthogonal. Is there someone know about it?...
View Articlefluid simulation post processing
I would like to ask a simple waterway model, such as in the picture, how to get along the pipeline, a one-dimensional curve of pressure and velocity changes from the inlet to the outlet, or the average...
View ArticleThermal Analysis of an actuator
To whom it may concern, I am trying to model and analysis EC 90 Maxonmotor actuator, I am modeling the actuator based on the CAD file and datasheet. For heat transfer part, I am making the winding as a...
View ArticleFind Potential by using Poisson equation
I want to calculate charge distribution due to the geometry and potential due to geometry of a trap in PDMS. Can you please guide me how can I do this using the poisson equation. I am also new to...
View ArticlePoint load in 2D
I have a simple 2D model, with a bezier open curve (linear segments) defining my beam structure. All beams are same and define some rigid truss (where I want to take into account torques so I am...
View Article