Vortex breaker

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Anonymous Poster	Vortex breaker 12/24/2009 2:08 AM
	A vessel has a boot of 3' ID and 11' height. The outlet is from the cylindrical surface and not at the boot bottom. The outlet is located 1' from the boot bottom. The liquid level is filled completely 100 % in the boot. Is there a chance of vortex formation and is there a necessity of vortex breaker in such cases.
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Tornado Guru Join Date: May 2009 Location: Richland, WA, USA Posts: 21017 Good Answers: 795	#1 Re: Vortex breaker 12/24/2009 3:16 AM
	Please give the flow rate of whatever is being withdrawn from the boot, and a sketch of what goes where, with dimensions. (If the boot is a mere passive sump that simply collects a heavier liquid for subsequent drainage, there may be no important issue. Otherwise, some sort of vortex eliminator or anti-rotation device may be indicated.) __________________ In vino veritas; in cervisia carmen; in aqua E. coli.
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PennPiper Guru Join Date: Feb 2007 Location: Bayonet Point, Florida Posts: 635 Good Answers: 61	#2 Re: Vortex breaker 12/24/2009 12:16 PM
	I would install a Vortex Breaker in this Boot during the initial vessel fabrication. Reason: - It is very cheap to do it at that time. The cost of installing that Vortex Breaker is penny's compared to shutting down the Unit, Draining the vessel and safely installing one after the fact. - You never can tell what a Vortex is going to do, it might form and extent the full length of the Boot and clear up through the liquid level in the primary vessel. - If you do get a serious Vortex you also run the risk of damaging the associated pumps. There is even more cost! __________________ Do it once and do it right
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phoenix911 Guru Join Date: Aug 2007 Posts: 23647 Good Answers: 420	#3 Re: Vortex breaker 12/24/2009 6:06 PM
	There are books on the subject that explains the effects of vortices on the discharge coefficient for flow of a liquid through an orifice as well as previous discussions on this site p911 __________________ “ When people get what they want, they are often surprised when they get what they deserve " - James Wood
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bioramani Guru Join Date: Jun 2009 Location: Bangalore, India Posts: 725 Good Answers: 24	#4 Re: Vortex breaker 12/25/2009 7:51 AM
	If the outlet is not exactly radial and the flow rate is high some vortex will result. In a similar application (dia 2.5 ft and ht 5 ft, 5% salt solution) we used a loosely rolled 1/4 SS mesh in a 3" dia 6" long cylinder located inside at the entrance to the out let. Did not have any vortex at various flow rates. __________________ bioramani
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