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Natural Free Convection

Hello, I'm attempting to model the temperature rise above ambient over the period of one day within a sealed concrete trough buried in soil with its top exposed to outside air. I have successfully...

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Meaningul drag output

This is a working stationary turbulent flow model. I have created an integral solution set around the boundaries of the object id like to determine lift and drag for. All posts i have read involve...

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Meshing in matlab

Hi, I am having real difficulty to control my mesh in matlab. Basically I don't have any control over it. Its quite a simple model but im finding that if I change the numbers in the code, I get the...

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How prevent an object from penetrating another object?

The attached file has a simple case that is a precursor to what I really need to model. The simple case consists of a membrane (hyperelastic material model) with a small quartz bead located a short...

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Linking problem when developing GUI with java API

Hello everyone! I am trying to develop a custom GUI in java using COMSOL API. I am following the guidelines in the API Reference, but if I try to paint the result on the GUI, I get a linking exception...

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Using interpolation tables for temperature dependent structural and themal...

This will eventually be an analysis of the thermal and structural very steep pulses but for now I am keeping it simple. (stationary and moderate time dependent loads) In trying to defining some basic...

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software simulation forming glass

hi, any of you know what is the best software for simulation of forming glass by a bender. thanks.

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particle motion in a fluid (2D)

Hi, I am attempting a 2D model of the motion of a single particle in a fluid medium inside a microchannel. I am aware that there is a COMSOL tutorial on such a simulation. However, in the tutorial, the...

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reaction is not happening in tubular reactor

Hello guys, I have designed a tubular reactor in comsol 4.2 but after computing it doesn't show any variation. my reaction rate id not changing my conversion is not changing. only axial flow velocity...

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my reaction is not happening in comsol. 4.2

Hello guys, I have designed a tubular reactor in comsol 4.2 but after computing it doesn't show any variation. my reaction rate id not changing my conversion is not changing. only axial flow velocity...

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VCCS

Dear all, I simulating a 3D electrode model and do not know how to use voltage controlled current source (VCCS) under electric circuits (ec). Can anyone help me where can I find examples using the...

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eigen frequency

I'm able to get frequency in complex no can i able to get it in real no only

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analysis

I unable two get the same resonant frequency for eigen frequency and frequency domain solver

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How to move one geometry object continuously in matlab .m file?

Hi, I am a comsol user and I have built a 3D model,in which a small bubble flows inside a glass tube is simulated. I plan to make the bubble move from 0.11m to 0.21m continuously with a step of 0.001m....

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Lithium ion battery 1D model: solver error

hi, I am trying to solve the Lithium ion battery model from the model library (li_battery_1d). I am always getting this error message while solving study1 in it .Please help me on this. Repeated error...

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applying a magnetic field

Hello, I would like to know how to apply a magnetic field on metal electrodes of a Surface acoustic wave resonator using COMSOL 3.5 a. Thak you

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creating a coordinate system in the matlab console

Hello everyone, is there a specific function for drawing a coordinate system over the Matlab LiveLink in the Matlab console? I'm not yet familiar with all the functions concerning the LiveLink. My aim...

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Navier-Stokes Simulation using General Form PDE: The Continuity Equation

Greetings all. I am working to solve a standard fluid flow problem (e.g. flow in a pipe as a start) using the General Form PDE interfaces instead of the Fluid Flow built in GUI. I am able to define a...

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numerical oscillation in modelling corona discharge with coefficient form...

Hi,everyone I,m working on modelling corona discharge in air with coefficient form PDEs and Electrostatics interface. I'm encountering the problem of numerical oscillation in the simulation area...

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Electrostatic Precipitator... Help!!

Hello I want to simulate an Electrostatic Precipitator. In conditions of laminar flow field and electric filed, it is requierd how many particles are gathered. However, in my simulation, the efficiency...

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