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

Question Regarding Experimental Verification

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

Reply
 
LinkBack Thread Tools Display Modes
Old   June 18, 2002, 08:20
Default Question Regarding Experimental Verification
  #1
Abhi
Guest
 
Posts: n/a
When you open the valve on your garden hose, with the hose full of water, a pressure wave travels along the hose at the speed of sound in water (water level in reservoir comes down, when these pressure waves reaches reservoir ).

-Reference -- Fundamentals of Physics by Halliday, Resnick, Walker, Sixth Edition, Page No. 617

Question: When, where, who, how the above statement has been experimentally verified ? (Please concentrate on sentence "when you OPEN the valve". I am NOT talking about "when you CLOSE the valve".)

If we carry out experiment, we will find that water level in reservoir comes down instantaneously i.e. at exactly same moment we open the valve. Obviously faster than speed of light.

Thanks And Please Do Reply Me.

-Abhi. _________________________________________________ Abhijit Patil, C/o LIC of India, Shahada, Dist: Nandurbar, (MS), India. Pin: 425409. Email: xabhix@hotmail.com Homepage: http://www.geocities.com/discoverynews _________________________________________________
  Reply With Quote

Old   June 18, 2002, 13:48
Default Re: Question Regarding Experimental Verification
  #2
Jonas Larsson
Guest
 
Posts: n/a
Perhaps the reason is that the speed of sound in water is about 1500 m/s. With a 15 m long hose the time-lag would only be 0.01s. Without a sophisticated measuring device this would seem instantanous.
  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
question about uds tanven FLUENT 2 July 5, 2015 11:22
Step Changes in Roughness Experimental Data syler3321 Main CFD Forum 0 October 20, 2010 00:45
nice plot of boundary layer with experimental values jack1980 FLUENT 0 May 5, 2010 08:59
Question about Table applicaiton. universez OpenFOAM Running, Solving & CFD 0 January 12, 2010 21:31
CFD experimental validation Massimiliano Gasparetti Main CFD Forum 5 November 24, 1998 08:07


All times are GMT -4. The time now is 12:31.