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<br />EM 1110-2.1416 <br />15 Oct 93 <br /> <br />1.1, HorlIonI" <br /> <br />1 --..:;.:::... - -O-O..,.Oe <br />. ~2 <br />- -,____ \ O._O.Oe <br />, -- --" <br />Oe 1.1 . -. <br />_~ lPOe>O <br /> <br />"'~..."'~ <I., <br /> <br />-, .... '...':.'4' <br /> <br />Mild clap. <br />So>O..O.-Dc <br /> <br /> <br />-r-- -_ c, HorIzo.t.. <br />'Dn=De.~ <br /> <br />"'/.;'~ <br />,....,......."'............." <br /> <br />Dn:<n <br /> <br />C,ilicot slop. <br />.50,>0', O.=De <br /> <br />~ <br /> <br />, , <br />--_...- ---------T.A~- <br /> <br />_~Oe <br /> <br />HorllonCol slop. <br />So =0, O. =00 <br /> <br />Figure 2-5. Classification of steady flow profiles <br /> <br />analysis of mass and energy conservation. Conservation <br />of mass is often referred to as flow continuity. Continu- <br />ity is the principle that states that mass (stream flow <br />volume) is conserved (e.g.. mass is neither created nor <br />destroyed within the system being evaluated). Mass <br />conservation in a volumetric sense means that the volume <br />passing a given location will also pass another location <br />downstream provided that changes in storage, tributary <br />inflows and outflows, evaporation, etc. between the two <br />locations are properly accounted for. <br /> <br />2-10 <br /> <br />, <br /> <br />0.=00 <br /> <br />Htrltorild <br />~t <br />_. -":"1---. <br />----f-- /A, <br />Dc ./" <br />. ~/ <br /> <br />Advetct elope <br />, So<O, 0.=00 <br /> <br />(Il The simplest description of mass conservation <br />for steady, one-dimensional, flow without intervening <br />inflows and outflows is: <br /> <br />Q ~ V]xA] ~ V2xA2 = ...VjxAj <br /> <br />(2-4) <br /> <br />where <br />Q = volumetric flow rate (fflsec) <br />V = mean flow velocity (ftlsec) <br />A = cross-sectional flow area (n2) <br /> <br />e <br /> <br />. <br />. <br /> <br />. <br />. <br /> <br />e <br /> <br />. <br /> <br />i <br /> <br />e <br />