Pipe Flow Equation for Non Viscous Fluid

6 comments

Rate

Anonymous Poster #1	Pipe Flow Equation for Non Viscous Fluid 10/29/2012 9:27 AM
	Sir, Could you tell me the Bernouli's equation for the case of a pipe from a tank bottom connected to a tank which is below the first tank. diameter of the pipe is constant. Considering the surfaces of a liquid level as sections 1 and 2, liquid as non viscous fluid with no losses in the pipe line (bend, contraction, expansion...), tank liquid surfaces are z1 and z2 m height from the datum, Bernauli's equation reduces to z1-z2 = 0. But actually z1-z2 is not equal to zero. why this contradicting result? is this because of choosing my sections 1 and 2 or any other reasons? this same will come, if i choose two cross sections in a vertical pipe of constant diameter? kindly correct my understanding.
	Reply

Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

lyn Guru Join Date: Oct 2008 Posts: 42355 Good Answers: 1693	#1 Re: pipe flow equation for non viscous fluid 10/29/2012 9:30 AM
	Pressure-Flow Calculations
	Reply

PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#2 Re: Pipe Flow Equation for Non Viscous Fluid 10/29/2012 10:22 AM
	All fluids have viscosity. So the starting point is not valid. If the viscosity were zero, then the flow through the pipe would be infinitely large, the top tank would empty immediately into the bottom tank and the illustration would not be representative. So start again. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
	Reply

Power-User

Join Date: Aug 2013

Location: OHIO, tri-State design and installation, and travel nationally and consults also are international

Posts: 274

#4
In reply to #2

09/10/2013 3:06 AM

Newtonian	A Newtonian fluid is a viscous fluid whose shear stresses are a linear function of the fluid strain rate. Mathematically, this can be expressed as: t _ij = K_ijqp*D_pq, where t_ij is the shear stress component, and D_pq are fluid strain rate components.
perfect	A perfect fluid is defined as a fluid with zero viscosity (i.e. inviscid).

__________________
Simply choose your utility supplier contracting WITHOUT BROKERS and opt-out of community aggregations for free choices.

JP76 Power-User Join Date: Aug 2013 Location: OHIO, tri-State design and installation, and travel nationally and consults also are international Posts: 274	#6 In reply to #4 Re: Pipe Flow Equation for Non Viscous Fluid 09/10/2013 3:22 AM
	But a real fluid having some viscosity, also has a rotational velocity in a stream in such as a constrained domain as within piping, too. - 'some' affecting perfect results about respect to a formula __________________ Simply choose your utility supplier contracting WITHOUT BROKERS and opt-out of community aggregations for free choices.
	Reply

JP76 Power-User Join Date: Aug 2013 Location: OHIO, tri-State design and installation, and travel nationally and consults also are international Posts: 274	#3 Re: Pipe Flow Equation for Non Viscous Fluid 09/10/2013 3:02 AM
	Bernoulli's principle - Wikipedia, the free encyclopediaBernoulli equation for incompressible fluids. The Bernoulli equation for incompressible fluids can be derived by ...en.wikipedia.org/wiki/Bernoulli…principle - Bernoulli's EquationBernoulli's Equation The Bernoulli equation states that, where points 1 and 2 lie on a streamline, the fluid has constant density, the flow is steady, andwww.princeton.edu/~asmits/Bicycle…Bernoulli.html - Bernoulli's equation - Physics Forums LibraryBernoulli's equation Library Item. Find a definition, equations, related links and scientists on Bernoulli's equation at Physics Forums. Register to discuss Bernoulli ...www.physicsforums.com/library.php…115 - __________________ Simply choose your utility supplier contracting WITHOUT BROKERS and opt-out of community aggregations for free choices.
	Reply

JP76 Power-User Join Date: Aug 2013 Location: OHIO, tri-State design and installation, and travel nationally and consults also are international Posts: 274	#5 Re: Pipe Flow Equation for Non Viscous Fluid 09/10/2013 3:11 AM
	had some fun (off topic) watching ~ 10 ft of 2" (1.93" I.D.) PE 3408 x sdr11 pipe with ~14ft of head from a reservoir deliver over 65 gpm of water , open end straight downward off one 90-elbow from a bulkhead __________________ Simply choose your utility supplier contracting WITHOUT BROKERS and opt-out of community aggregations for free choices.
	Reply Off Topic (Score 5)

Copy to Clipboard

JP76 (4); lyn (1); PWSlack (1)

	Got Something to Say?
	Ask a Question Start a Discussion

	Aerospace
	BioMech & BioMed
	Chemical & Material Science
	Civil Engineering
	Communications & Electronics
	Education and Engineering Careers
	Electrical Engineering
	General Discussion
	Instrumentation
	Manufacturing
	Mechanical Engineering
	New Technologies & Research
	Software & Programming
	Sustainable Engineering
	Transportation

	Site Directories
	Forum Directory Blog Directory User Group Directory RSS Feeds CR4 Rules of Conduct CR4 FAQ Site Glossary Who's Online (83 right now) Show Members