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singh
Participant

Join Date: Jan 2009
Posts: 4

FLUID MECHANICS

02/01/2009 1:35 PM

I HAVE A DOUBT ABOUT FLUID MECHANICS IS THERE ANY POSSIBILITIES WHEN ALTITUDE/HUMIDITY INCREASE / DECREASE IT AFFECT THE FLOW (WATER)(PRESSURE/DISCHARGE) HOW IT VARY DUE TO WHAT? PLS CLARIFY MY DOUBT IF THESE THING AFFECT PRACTICALLY HOW TO CHECK&RECTIFY THESE PROBLEMS.

NORMALLY FOR EXAMPLE TO ATTAIN 1 BAR PRESSURE WATER IN GRAVITY FLOW HOW MUCH WE HAVE TO RAISE FROM EARTH LEVEL. IS THERE ANY CALCULATION FOR THE PRESSURE/ DISCHARGE PLS CLARIFY MY DOUBT.
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Anonymous Poster
#1

Re: FLUID MECHANICS

02/02/2009 9:43 AM

Altitude would affect fluid properties and pressures such as specic weight etc. I don't recall humidity having any influence in flow...especially with liquids, gases..maybe.
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SardMan
Associate

Join Date: Dec 2008
Posts: 31
#2

Re: FLUID MECHANICS

02/02/2009 9:50 AM

Singh,

The only way low atmospheric pressure will noticeably affect flow is when using a pump. Review the equation of the NPSH (Net Positive Suction Head) and you will find a term that contains the atmospheric pressure. At high altitude the vapor pressure diminishes and the pump can "starve" going into cavitation.

I do not think that open channel flow is influenced by low atmospheric pressure.

M.
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U V
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Hobbies - Model Rocketry - New Member

Join Date: Jun 2007
Location: East of Seattle, Washington state Republic of the 50 states of America
Posts: 2045
Good Answers: 36
#3

Re: FLUID MECHANICS

02/03/2009 1:01 AM

Smells of HOME WORK from school.

__________________
 (Larrabee's Law) Half of everything you hear in a classroom is crap. Education is figuring out which half is which.
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Anonymous Poster
#4

Re: FLUID MECHANICS

02/05/2009 10:37 PM

Please don't YELL! It hurts my eyes!!
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