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 The information provided may be out of date.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.
Pressure gradient vs time plot
Posted 2011年2月25日 GMT-5 04:29 Computational Fluid Dynamics (CFD) Version 3.5a 1 Reply
Please login with a confirmed email address before reporting spam
Hi,
I have solved a pulsating fluid flow problem in a straight cylindrical duct.Now I would like to obtain a plot for 'pressure difference between inlet and exit of duct 'vs 'time'(to see the variation of pressure gradient with time).Can anyone suggest me about doing that..Thanks in advance
SM Ananth
I have solved a pulsating fluid flow problem in a straight cylindrical duct.Now I would like to obtain a plot for 'pressure difference between inlet and exit of duct 'vs 'time'(to see the variation of pressure gradient with time).Can anyone suggest me about doing that..Thanks in advance
SM Ananth
1 Reply Last Post 2011年2月25日 GMT-5 11:21
Please login with a confirmed email address before reporting spam
Posted:
1 decade ago
Hi
you want the average velocity ? then integrate or average the inlet and the outlet (i.e.over u if the flow is along "x") and call them as variables
Vin_ave = aveop1(u)
Vout_ave = aveop2(u)
and then do a Derived Values Global Evaluation of "Vout_ave - Vin_ave"
That was for v4.
In V3.5 you do not have the average operator but you can use two integration coupling boundary variable of "int_u = int_of u" and another of "int_1 = int_of 1", and then define a user variable Vin_ave = int_u / int_1
An plot the post processing value difference of the two
--
Good luck
Ivar
you want the average velocity ? then integrate or average the inlet and the outlet (i.e.over u if the flow is along "x") and call them as variables
Vin_ave = aveop1(u)
Vout_ave = aveop2(u)
and then do a Derived Values Global Evaluation of "Vout_ave - Vin_ave"
That was for v4.
In V3.5 you do not have the average operator but you can use two integration coupling boundary variable of "int_u = int_of u" and another of "int_1 = int_of 1", and then define a user variable Vin_ave = int_u / int_1
An plot the post processing value difference of the two
--
Good luck
Ivar