How to calculate total area of a range of pressure

Jimmyhanchn · November 5, 2017, 03:53

I can calculate pressure on any surface, but I would like to calculate total area of any range of pressure by CFX. For example, I have the pressure pattern or pressure contour, I want to know the total area of pressure from 1Pa to 2Pa. How can I do that? CFX post can get this result, right?

ghorrocks · November 5, 2017, 05:01

In CFD-Post, define a contour object with the contour lines you want. Then define a user surface using the contour lines as the method.

Jimmyhanchn · November 5, 2017, 20:08

Thank you so much for your reply, check my steps plz, if I understand your suggestion clearly.
step1, define a new contour and value range use `user specified`
step2, define a `user surface` and method select from the contour which is defined in step1
step3, use calculators`s function calculator and select area function and location `user surface` which is defined in step2
an question. `#of contours` and `contour level` value is not important in this calculation,right?
Thank you for your kindness!

Jimmyhanchn · November 5, 2017, 20:10

I need your help really.

ghorrocks · November 6, 2017, 02:13

That sounds about right. Why don't you just try it and see if it works?

Jimmyhanchn · November 6, 2017, 19:25

Quote:

Originally Posted by ghorrocks

That sounds about right. Why don't you just try it and see if it works?

I have tried it, but I dont know the result is correct or not. anyway, I can find the way to check it. Thank you for your time.

November 5, 2017, 03:53	How to calculate total area of a range of pressure	#1
Jimmyhanchn Member Jimmy Join Date: Sep 2016 Location: Japan Posts: 38 Rep Power: 10	I can calculate pressure on any surface, but I would like to calculate total area of any range of pressure by CFX. For example, I have the pressure pattern or pressure contour, I want to know the total area of pressure from 1Pa to 2Pa. How can I do that? CFX post can get this result, right?

November 5, 2017, 05:01		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	In CFD-Post, define a contour object with the contour lines you want. Then define a user surface using the contour lines as the method. Jimmyhanchn likes this.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Total Pressure or Total Pressure in Rel Frame	MissCFD	CFX	4	March 24, 2015 05:19
is internalField(U) equivalent to zeroGradient?	immortality	OpenFOAM Running, Solving & CFD	7	March 29, 2013 02:27
Water subcooled boiling	Attesz	CFX	7	January 5, 2013 04:32
rotating frame of reference and total pressure	viking	ANSYS	1	November 24, 2010 00:25
Total pressure in a laval nozzle	Sohail Ahmed	FLUENT	0	May 19, 2004 06:28

November 5, 2017, 20:08		#3
Jimmyhanchn Member Jimmy Join Date: Sep 2016 Location: Japan Posts: 38 Rep Power: 10	Thank you so much for your reply, check my steps plz, if I understand your suggestion clearly. step1, define a new contour and value range use `user specified` step2, define a `user surface` and method select from the contour which is defined in step1 step3, use calculators`s function calculator and select area function and location `user surface` which is defined in step2 an question. `#of contours` and `contour level` value is not important in this calculation,right? Thank you for your kindness!

November 5, 2017, 20:10		#4
Jimmyhanchn Member Jimmy Join Date: Sep 2016 Location: Japan Posts: 38 Rep Power: 10	I need your help really.

November 6, 2017, 02:13		#5
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	That sounds about right. Why don't you just try it and see if it works?