Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.
Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
Parameter or frequency sweep for local or global variables
Posted 28 nov. 2011, 16:53 UTC−5 Low-Frequency Electromagnetics, Materials, Parameters, Variables, & Functions, Results & Visualization Version 4.2 1 Reply
Please login with a confirmed email address before reporting spam
Hello,
How can I correctly define and then plot my local variables that depend on frequency, following a frequency domain study (frequency sweep)?
I am using AC/DC module for a simple AC electrokinetics problem. My variable is a vector of force that depends on the electric field at a point, and frequency-dependent effective polarisation, alpha. Effective polarisation is in turn dependent on complex permittivity of the two materials that make the structure.
I defined the complex permittivities (eps_1 and eps_2) as parameters that depend on another parameter, frequency 'freq'. Alpha is a local variable given as an expression of the eps_1 and eps_2. Force is another vector variable whose X and Y components are given as expressions in alpha, Ex.norm, and Ey.norm.
Q1. I am unable to plot alpha(freq) from a frequency domain study, frequency sweep. I therefore don't trust my results for force. How could I verify the values of eps_1/2, and alpha for different frequencies? or plot them against frequency?
Q2. How can I ensure the values of the parameters specified are indeed changed according to the frequency sweep settings? Should I be defining the frequency-dependent parameters and variables differently?
Many thanks!
How can I correctly define and then plot my local variables that depend on frequency, following a frequency domain study (frequency sweep)?
I am using AC/DC module for a simple AC electrokinetics problem. My variable is a vector of force that depends on the electric field at a point, and frequency-dependent effective polarisation, alpha. Effective polarisation is in turn dependent on complex permittivity of the two materials that make the structure.
I defined the complex permittivities (eps_1 and eps_2) as parameters that depend on another parameter, frequency 'freq'. Alpha is a local variable given as an expression of the eps_1 and eps_2. Force is another vector variable whose X and Y components are given as expressions in alpha, Ex.norm, and Ey.norm.
Q1. I am unable to plot alpha(freq) from a frequency domain study, frequency sweep. I therefore don't trust my results for force. How could I verify the values of eps_1/2, and alpha for different frequencies? or plot them against frequency?
Q2. How can I ensure the values of the parameters specified are indeed changed according to the frequency sweep settings? Should I be defining the frequency-dependent parameters and variables differently?
Many thanks!
1 Reply Last Post 29 nov. 2011, 01:31 UTC−5
Please login with a confirmed email address before reporting spam
Posted:
1 decade ago
Hi
study the Results Derived Values node, this generates tables with your values, and you can easily plot your tables (icon on the table border)
--
Good luck
Ivar
study the Results Derived Values node, this generates tables with your values, and you can easily plot your tables (icon on the table border)
--
Good luck
Ivar