Menu

Discussion Forum

New Discussion
フィルター

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 The information provided may be out of date.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.

How to get mean value?

Posted 2011/01/20 5:16 GMT-5 Low-Frequency Electromagnetics, Results & Visualization Version 4.0a 6 Replies

Patryk Grabowski
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hi,

I have made a plot in comsol. X axis is in [m] and Y is in [T]. what should I do to get mean value of flux density[T]?
6 Replies Last Post 2011/01/20 9:46 GMT-5
Kai Herbrig
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 2011/01/20 5:27 GMT-5
forget your T(x) plot ... create a (total normal heat flux)/(Cp*rho) versus x plot, integrate over desired range ox x, divide by the length of the range of x. The obtained value should be the average "Temperatureflux" [K/s/m^2]!?!?
forget your T(x) plot ... create a (total normal heat flux)/(Cp*rho) versus x plot, integrate over desired range ox x, divide by the length of the range of x. The obtained value should be the average "Temperatureflux" [K/s/m^2]!?!?
Patryk Grabowski
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 2011/01/20 6:32 GMT-5
hmm...maybe I didn't explain properly what is problem. It's no t temperature. On Y axis is flux density in [T]-tesla, and on X axis is [m]-meter. I don't know what is Cp and rho in your explanation. I'm not very familiar with comsol:/ Could you explain me step by step what to do? I mean, what function I have to use and how? Currently I've beautiful graph similar to sinusoid but I what know what is mean value. it's ac/dc module.thx.
hmm...maybe I didn't explain properly what is problem. It's no t temperature. On Y axis is flux density in [T]-tesla, and on X axis is [m]-meter. I don't know what is Cp and rho in your explanation. I'm not very familiar with comsol:/ Could you explain me step by step what to do? I mean, what function I have to use and how? Currently I've beautiful graph similar to sinusoid but I what know what is mean value. it's ac/dc module.thx.
Kai Herbrig
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 2011/01/20 7:03 GMT-5
Forget my post :)

I just thought you are meant T for "Temperature". Yes, T as a unit is Tesla ... :)
btw: Cp ist the heat capacity at constant pressure and rho is the density.

But: to get an arithmetic mean value: integrate the varying value, then divide by the length of the integration range.
Forget my post :) I just thought you are meant T for "Temperature". Yes, T as a unit is Tesla ... :) btw: Cp ist the heat capacity at constant pressure and rho is the density. But: to get an arithmetic mean value: integrate the varying value, then divide by the length of the integration range.
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 2011/01/20 9:03 GMT-5
Hi

From V4 off you have the "Definition - Average operator", that integrates a variable over a length, respective surface or volume and then divide by the total length, respective area or volume to extract the numerical average, all pre-cooked for you ;)

--
Good luck
Ivar
Hi From V4 off you have the "Definition - Average operator", that integrates a variable over a length, respective surface or volume and then divide by the total length, respective area or volume to extract the numerical average, all pre-cooked for you ;) -- Good luck Ivar
Patryk Grabowski
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 2011/01/20 9:22 GMT-5
yes! thanks..one more question-how to put line with my mean value to the plot I've created?. I know only how to insert a value to the axis( plot> extra y) but I would like to lay eyes on it.
yes! thanks..one more question-how to put line with my mean value to the plot I've created?. I know only how to insert a value to the axis( plot> extra y) but I would like to lay eyes on it.
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 2011/01/20 9:46 GMT-5
Hi

in v4 make a "constant" function, and add a table value from a global derivation and plot in ontop of your existing plot. slightly complicated for a straigh line but "logic" once you have done it. And then you can adapt your function to something more complex than a straight line

Another way plot the deviation from the avrage, by subtracting the average value to the plot variable

--
Good luck
Ivar
Hi in v4 make a "constant" function, and add a table value from a global derivation and plot in ontop of your existing plot. slightly complicated for a straigh line but "logic" once you have done it. And then you can adapt your function to something more complex than a straight line Another way plot the deviation from the avrage, by subtracting the average value to the plot variable -- Good luck Ivar

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.

Suggested Content