Elasticity Matrix for Silicon
Hi all, I wonder would someone be able to shed light on something for me. In Si material properties, the anisotropic elasticity is defined as a 6x6 matrix: {D11, D21, D31, D41, D51, D61, D12, D21, D22,...
View Articlehow to access pressure value at boundary of membrane ?:PEM fuel cell modelling
I am modelling a low temperature PEM fuel cell model using the application library of HT-PEM fuel cell. I need to model electro-osmotic flow in the membrane. For this I need pressure value at the...
View ArticleGas velocity in a tube under isothermal heating
Hi, I'm working on modelling a gas flow inside a quartz tube. the gas flows from room temperature zone (25 cm long) and enters a hot zone (75 cm at 1000 C) . according to calculation the mean velocity...
View ArticleModeling a 2-D ultrasonic transducer array
Dear COMSOLers, Currently, I am trying to model a 2D ultrasonic array which are driven with different phases but with the same frequency. I am intend to calculate the acoustic pressure using Pressure...
View ArticleFailed to find a solution. Maximum number of Newton iterations reached....
Hi, I am trying to simulate Air flow through an extraction chamber. The file is too large to be attached here.. my inlet pressure is 1 pa and outlet is about -2 pa. It is the concept of suction which...
View ArticleLaminar Flow Entrance Region/Issues
I am attempting to model a long square flow channel with laminar flow of air. I was wondering though if anyone knows exactly how COMSOL computes the entrance region for laminar flow, or where I can...
View ArticleChanging the default equation in level set model
Hi, I was exploring Level-set method for 2 phase laminar flow and wondering if I can change the default equations according to my wish. If yes, how can I change the equation in pressure boundary...
View ArticleFSI with solid contact in the fluid domain
I've been trying to simulate a simple problem of a sphere moving in a stagnant fluid domain. The sphere come into contact with a solid object and deforms. Problem #1) In any contact problem, the gap...
View Articlesolving is not a convergence
I adopt a interface of the fluid flow and the heat transfer in the fluid to simulate the flow of the melt pool. However, computational process is not a convergence. Main faults focus on the following...
View ArticleElliptical cylinder
I am completely new to comsol, so please forgive me for posting a problem I suspect have a simple solution. I have tried to search for a solution myself, unsuccessfully. In a microfluidic problem I...
View Articlea Rigid Sphere travelling inside Fluides
Hello Everyone! I want to simulate a rigid sphere inside flowing fluid. Physical Specifications followed: 1. This rigid sphere DO NOT DEFORM 2. The rigid sphere and fluid is fully coupled 2.1 fluid...
View ArticleModelling cavitation
Hi, I'm new to Comsol and try to model hydrodynamic cavitation using the CFD module. Unfortunately, I don't know how to do this. Hydrodynamic cavitation comprises the nucleation, fluid’s vaporization...
View ArticleCoupling of 2d axially symmetric geometry with 3D-T-junction
Dear all, I am modeling a flow simulation where I would like to couple axially symmetric tubes to a 3D T junction (pipe flow would not be an option for me as my fluid flow is a little special - I need...
View ArticleSmall flow problems
I am simulating the behavior of a fluid passing through the interior of a cavity of a cylinder, a wall of the cylinder gives energy to the fluid, has been modeled by non-isothermal flow and applying...
View ArticleHydro static pressure flow
Hello, can anyone help me on how to apply hydro static pressure driven flow within a micro channel. Thank you.
View ArticleLaminar Flow Module Fluid Properties Input
Hi everyone, I am using the Laminar Flow Module to simulate convection in an annulus. I do not understand completely the impact of the "Input Temperature" of the Laminar Flow Node found in"Laminar Flow...
View ArticleOptimization with Particle Tracing Module
Hi everyone, As mentioned, I would like to use COMSOL's optimization module to apply to Particle Tracing for Fluid Flow physics interface. The model refers to "Acoustic Levitator" of the model...
View ArticleTerminal Falling Velocity of a sand garin (tutorial)
Hi everyone... Could someone please explain me why you add the GLOBAL VARIABLE X : X t - Xdo t. ? The physics of the problem only state the necesity to establish the equation Xdo t: Xdo...
View ArticleBuoyancy Force on Falling Sand Grain Example
Hello everyone, I know that there was a discussion about buoyancy forces acting on a rigid body but i spent some time for solving this problem and I will appreciate if you help me about my situation....
View ArticleBuoyancy Force
Hello everyone, I know that there was a discussion about buoyancy forces acting on a rigid body but i spent some time for solving this problem and I will appreciate if you help me about my situation....
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