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• 57

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FE Review-Fluid Mechanics40The Darcy friction factor forbothof the pipes&-shownis0.024. The total flow rateis300 m3/h.Whatisthe flow rate through the250mm pipe?Arr-(-)'--,=-(:) ,I~'I::-o.D\t(('AL\6WbA-(_::::§(,1.S")"l..\(~-=-o.OL\"'Mz_...___;.......;....;....;;.,..__.,~;........,.....:.-;..__---{6\$0 ~ ;~~offiindlameter3.eio~-=(I,0qS-)(c,,c,,~,,?·)~t.."'+-(o,6L\4M._)\}z_L,\J'"';L2-~\-=-P,Pc..-"l.'L\I1:::LLD,'1~=~50'1\}:0,IS°"M)~~Ll'DL("32.5"""')(o.lYM.)V,= (,O'?~JL-Downloaded by Mary Joy Lucero ([email protected])lOMoARcPSD|8236127
FE Review-Fluid Mechanics41EXAMPLE:Tworeservoirs areconnected850feetlong 6-inchdiameterpipe (f==0.020).pumpwiththegivencharacteristiccurvesis usedtoliftwaterfromone reservoirtotheDeterminethedischarge rate.byaAother.T100fttpump----,0--------:.-----/8090/6080140~070~-' ~--/20<<()00'cf2--~+-'~(]}-(]}(.)~>-'+-/00t::CJ..~50(.)-~~C-0.(.)(]}co80~40·c:;(]}"I-..ICl)"+-"f-~o30w40zo20/000zooL/00soo800/000DischargeCapacity(gpm)Downloaded by Mary Joy Lucero ([email protected])lOMoARcPSD|8236127
FE Review-Fluid Mechanics43Geometric Elements of Channel Sectionexample: trapezoidal sectionX -~;:.,-ltop widthTT20ft~,6~-.Iwettedperimeter:::::(2-)(/;,.L)i)+2--oJ+=l/b'CJ~f'::-~\1Y-t-c,,'t..-~I;;,l\¥hydraulic radiushydraulic depthc..1w~.Jt,...ts,j.. _w,r.-L/.I--1-+--Downloaded by Mary Joy Lucero ([email protected])lOMoARcPSD|8236127
FE Review-Fluid Mechanics44Example: Compute the dischargeinaconcrete(n=0.015) channelwiththeprevious cross-section and slope ofPJlb70.10%.-I/\=C).C)(...'.:::,f?_e:>ul,J-/vr=>.Sce>F~'.::::>=-O .Io;(=-c::>.00I\,L-=-/.4260.015"'Downloaded by Mary Joy Lucero ([email protected])lOMoARcPSD|8236127
FE Review-Fluid Mechanics45Example:Computethe normaldepthandQsnvelocity.·:. ,·400cfs0.00160.025'/X-- --;,'f.=2..'II -}-I-r =)"-J'-+(ly)'--,4=~z.o+(L;+(i){2y))j(y)J'ILt(tj/(2-}TZ 0'--b~)(zo+(~"'+Y,>')\(y)/..

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Term
Winter
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Mary Joy Lucero