Pressure definitions

Taron · May 3, 2016, 14:41

Hello guys, please give me the definitions of pressure, total pressure, absolute pressure, and dynamic pressure, and where can I find the static pressure in cfx-post, I find different forums about this, but everywhere there were written very lightly and different, so I want certain definition, thank you.

ghorrocks · May 3, 2016, 21:24

These definitions are correct as far as I know: https://en.wikipedia.org/wiki/Pressure

-Maxim- · May 4, 2016, 02:32

this might also be helpful regarding stn. frame and rel. frame:
http://www.cfd-online.com/Forums/cfx...el-frames.html

pressure = "static" pressure - reference pressure

absolute pressure = pressure + reference pressure

total pressure = pressure + dynamic pressure

Hope I didn't confuse myself by writing that up

Taron · May 5, 2016, 12:53

Thank you Maxim, could you explain me what is dynamic pressure????

ghorrocks · May 6, 2016, 01:29

dynamic pressure = 0.5*density*velocity^2

Taron · May 9, 2016, 08:17

One more question please, are static and hydrostatic pressures the same?

ghorrocks · May 9, 2016, 18:23

Hydrostatic pressure is the static pressure plus the pressure resulting from the weight of fluid above it.

May 3, 2016, 14:41	Pressure definitions	#1
Taron New Member Taron Join Date: Apr 2016 Posts: 9 Rep Power: 11	Hello guys, please give me the definitions of pressure, total pressure, absolute pressure, and dynamic pressure, and where can I find the static pressure in cfx-post, I find different forums about this, but everywhere there were written very lightly and different, so I want certain definition, thank you.

May 4, 2016, 02:32		#3
-Maxim- Senior Member Maxim Join Date: Aug 2015 Location: Germany Posts: 413 Rep Power: 13	this might also be helpful regarding stn. frame and rel. frame: http://www.cfd-online.com/Forums/cfx...el-frames.html pressure = "static" pressure - reference pressure absolute pressure = pressure + reference pressure total pressure = pressure + dynamic pressure Hope I didn't confuse myself by writing that up Taron likes this.

May 6, 2016, 01:29		#5
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,941 Rep Power: 145	dynamic pressure = 0.5densityvelocity^2 Taron likes this.

May 9, 2016, 18:23		#7
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,941 Rep Power: 145	Hydrostatic pressure is the static pressure plus the pressure resulting from the weight of fluid above it. Taron likes this.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

May 3, 2016, 21:24		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,941 Rep Power: 145	These definitions are correct as far as I know: https://en.wikipedia.org/wiki/Pressure

May 5, 2016, 12:53		#4
Taron New Member Taron Join Date: Apr 2016 Posts: 9 Rep Power: 11	Thank you Maxim, could you explain me what is dynamic pressure????

May 9, 2016, 08:17		#6
Taron New Member Taron Join Date: Apr 2016 Posts: 9 Rep Power: 11	One more question please, are static and hydrostatic pressures the same?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Wind tunnel Boundary Conditions in Fluent	metmet	FLUENT	6	October 30, 2019 12:23
Periodic flow using Cyclic - comparison with Fluent	nusivares	OpenFOAM Running, Solving & CFD	30	December 12, 2017 05:35
Outlet pressure	aja1345	FLUENT	5	August 18, 2015 11:02
Calculation of the Governing Equations	Mihail	CFX	7	September 7, 2014 06:27
Unsteady pressure differential between inlet and outlet of the pipe for single phase	joshi20h	FLUENT	0	September 26, 2012 12:41