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Local coordinate system for material properties
Dear all, we are trying to do an eigenfrequency analysis of a car tire and are struggling with defining the correct elastic material properties for the tire plies. The tire plies are fibrous composites...
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simulation of rectangulaire straight conductor
Hi everybody, i want to simulate a straight conductor wire to find the magnetic field B and the inductance of the wire so i used the MEF in ACDC module so i defined the begining of the wire to terminal...
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Finding the Domain number/Creating an entity of a feature created with the...
Hi everyone, I am using the Java API with Comsol and I really like it's abilities overall. I would like to be able to (in a for loop) create a 3D geometrical object (a cylinder) and then make that...
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How to define a acoustic point source
Hi all, I have a problem with Comsol. I defined a point source from 1m away from a acoustic lens, but it seems that there is no convergent behind the acoustic lens. Normally, if I use a plane wave as...
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Cooling of a liquid inside a tube
Hi, all I want to model the cooling of a liquid metal inside a tube flowing under laminar conditions. Specifically I want to calculate the variation of the Nusselt number on the tube wall during the...
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About the ploting the results
Hey Ivar, I just bulit a simple model to analyze the heat transfer. After analysis is finished, I want to plot the result. So I cut one point 2D-1, but I can not plot the temperiture variation with...
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Moving mesh 2D
Hello, I am trying to simulate the moving boundary for a 2D geometry. I started with a simple 2D geometry where 1 boundary is moving in the x-direction and 1 boundary in y-direction, but because the...
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Large deformation - compression
Hello! I am a newbie at Comsol programming, trying to come to terms with the program. I have a very simple model of a material under compression. The material (should) undergo large deformation when...
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Pulse 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...
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Large 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
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Surge impedance of transmission tower
Hi everyone. I am trying to model an overhead line system, in which the transmission tower should be defined as a surge impedance. I expect the wave will go down the transmission tower and get...
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Undefined 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...
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AC Joule Heating question
I'm currently on a trial license trying to evaluate this product for my company. I have here an assembly of 3 connectors. One end is given a terminal condition (with 2000 or 3000 amps), the other is...
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Heat equation in cylindrical coordinate
Hi Does any one know how I can use cylindrical coordinate in 2D (r &theta) in heat trasnfer module for the heat equation? Basically I want to monitor conduction in radial direction only. Thanks
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Local coordinate system for material properties
Dear all, we are trying to do an eigenfrequency analysis of a car tire and are struggling with defining the correct elastic material properties for the tire plies. The tire plies are fibrous composites...
View ArticleClik here to view.
simulation of rectangulaire straight conductor
Hi everybody, i want to simulate a straight conductor wire to find the magnetic field B and the inductance of the wire so i used the MEF in ACDC module so i defined the begining of the wire to terminal...
View ArticleClik here to view.
Comb 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 ArticleClik here to view.
Finding the Domain number/Creating an entity of a feature created with the...
Hi everyone, I am using the Java API with Comsol and I really like it's abilities overall. I would like to be able to (in a for loop) create a 3D geometrical object (a cylinder) and then make that...
View ArticleClik here to view.
How to define a acoustic point source
Hi all, I have a problem with Comsol. I defined a point source from 1m away from a acoustic lens, but it seems that there is no convergent behind the acoustic lens. Normally, if I use a plane wave as...
View ArticleClik here to view.
Cooling of a liquid inside a tube
Hi, all I want to model the cooling of a liquid metal inside a tube flowing under laminar conditions. Specifically I want to calculate the variation of the Nusselt number on the tube wall during the...
View Article