application of tuning fork MEMS Gyroscope
Hello, I wanted to know the "applications of tuning fork MEMS gyroscope" which can be easily design in comsol multiphysics. An i also wanted to know the various applications realated to tuning fork an...
View Articleelectrical potentials
Hi, I´m analyzing the distribution of electrical potentials through different geometries with varying conductivities. An active electrode is firing with 1V under quasi-static conditions. To analyse the...
View ArticleHow to add gas velocity in turbulent bubbly phase?
Hi, I am trying to model a gas-liquid system. I selected turbulent bubbly flow model as it is based on Euler-Euler equation. But I don't know how to add gas velocity field at inlet. Liquid phase in my...
View ArticleFinalizing a geometry and boolean operations
I have a fairly basic question. After creating a geometry, what is benefit of forming an Union or an Assembly? I have been solving some preliminary models without forming an union/assembly. I have...
View ArticleElectrical Field simulation
Hi, I have interdigit structure covered by gold nanostructure. Is it a way to simulate electrical field in my structure? Thanks,
View ArticleDeflection in a Membrane due to Stress
Hi Everyone, I have a circular membrane ( made of Single crystal silicon Si(c) ) of 6mm diameter and 5 um thickness. The Membrane is fixed through the sides with a residual/intrinsic/internal stress of...
View ArticleHow to define Function in Definitions / Variables.
I'm currently working on electrical simulation using AC/DC module. I define nonlinear electric conductivity for zinc oxide material using following function(ZnO) in subdomain settings, but it shown...
View ArticleMesh continuity at boundaries
Hello, I'm starting with Comsol, and I have this question, that may sound really basic to many of you. I have defined a contact pair between two parts of my geometry - an assembly. Now I would like to...
View ArticleUndefined value found // Hyperelastic parameters
Here we go again: When it comes to solving im getting anther error wich is quite frustrating. It says: Undefined value found. Detail: Undefined value found in. The equation-residial-vektor. There are...
View ArticleComb drive resonator in COMSOL
Hi, I need to use COMSOL to simulate a comb drive as a resonator. I used poly-Si for the comb drive and covered it by air. I assume that I need to choose Electromechanics Physics for my model. It...
View Articleparticle tracing module
Is there anyway to control the particle position in the inlet condition with number? example, x = 50-950um (50um apart) y= 5300um z=-50um thanks,
View ArticlePulse Volt vs Time
Does anyone has any idea where and how can I insert a time factor into the simulation? Let says I want the voltage to rise from 0 to 2V (within 40ns) --> stays at 2V for another 100ns --> falls...
View Articleresults
how can i plot a line graph of load against deflection at the mid point for a 3D beam
View ArticleLarge Eddy Simulation
hello I want to use Large Eddy Simulation on comsol but I can't found it. Can you help how to do this. thanks a lot
View Articlesimulate the electric field and potential distribution
Hi I am using AC/DC module to simulate the electric field and potential distribution over a high voltage composite insulator. when applying AC input voltage. I got the electric field distribution E...
View Articlehow to resolve error? The smoothing zone must be smaller than half the width.
The smoothing zone must be smaller than half the width. Thanks for hints.
View ArticleHelmholtz PDE for Acoustic scattering
I´m traying to use the General PDE- Helmholtz equation to solve an acoustic scattering problem, I know I can use the Acoustic Module, but i want to do it with the general PDE as this give me a little...
View ArticleRadiation model
Hi, I am starting to use Comsol and have problems making a simple model. It consists on a heat source ( rectangle for example) and a thin sheet of aluminum where I want to see how the temperature...
View ArticleVariable length of the boundary load
Dear all, I have a simple 2D model, that is a cantilever beam. I would apply on this beam a boundary load, but the LENGTH of the boundary load should change over time (increasing or decreasing). Just...
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