CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLUENT

Total and Static Pressure drop

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   December 4, 2008, 10:59
Default Total and Static Pressure drop
  #1
Jaggu
Guest
 
Posts: n/a
Hi Could any body tell me.Is there any scenario where total pressure drop will be less than the static pressure drop.? Generally which Pressure drop will be used to design the system?where shall i get the complete information on static and total pressure drop?if any body has link or e paper please pass to me

Thanks in advance
  Reply With Quote

Old   December 4, 2008, 16:04
Default Re: Total and Static Pressure drop
  #2
mAx
Guest
 
Posts: n/a
Ptot = Pstatic + Pdynamic

with Pdynamic = 0.5*rho*U^2 >0

How could be the total pressure drop less than the static?

From the mathematical side, it isn't possible
  Reply With Quote

Old   December 9, 2008, 06:27
Default Re: Total and Static Pressure drop
  #3
krish
Guest
 
Posts: n/a
Hi...Lets arrive at the answer like this,

Total pressure drop = Static pressure drop + Dynamic pressure drop.

Total pr drop will be less than stat pr drop provided the dynamic pr drop is negative. That means the the velocity of the fluid is increasing therefore dynamic pressure drop increases than that of static pressure drop. when there are many recirculations in the fluid domain, total pressured drop will be more than that of static pressure drop.

I guess what i analysed is right..Let me know if u have any other queries on this issue
  Reply With Quote

Old   December 9, 2008, 07:03
Default Re: Total and Static Pressure drop
  #4
krish
Guest
 
Posts: n/a
Hi, I apologize for the wrong response which i gave recently. Here is the exact and correct explaination for the question you have asked. Total pr = st. pressure + dynamic pressure but total pr drop caanot be equal to st pr drop + dynamic pr. drop.

Dynamic pressure is the pressure which you can measure only at a point. Generally we cannot infer any thing by analysing the total pr drops and static pr drops. By looking at the total pr contours we can infer where there are recirculations etc. okay....
  Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
static vs. total pressure auf dem feld FLUENT 14 February 3, 2015 06:08
Total and static pressure drop Janakiram CD-adapco 1 February 8, 2009 02:32
total or static pressure? George Main CFD Forum 0 November 22, 2005 04:53
static or total pressure? Tim Phoenics 1 September 24, 2003 12:36
Static vs Total Pressure Alfonso Ferrandez FLUENT 2 May 23, 2000 08:53


All times are GMT -4. The time now is 09:45.