lect25 fluda dinamik.ppt

7/25/2019 Lect25 Fluda dinamik.ppt

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01/14/16 Physics 201, UW-Madison 1

Physics 201 : Lecture 25Physics 201 : Lecture 25

Fluid Dynamics

Continuity Equation

!"noulli Equation

Poissi!ul!#s Equation


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Types of Fluid FlowTypes of Fluid Flow

$amina" %lo&

't!ady %lo&

Each (a"ticl! o% th! %luid %ollo&s a smooth (ath

)h! (aths o% th! di%%!"!nt (a"ticl!s n!*!" c"oss !ach oth!"

)h! (ath ta+!n y th! (a"ticl!s is call!d a streamline

)u"ul!nt %lo&

n i""!.ula" %lo& cha"act!"i!d y small &hi"l(ool li+! "!.ions

)u"ul!nt %lo& occu"s &h!n th! (a"ticl!s .o ao*! som! c"iticals(!!d


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Ideal Fluid FlowIdeal Fluid Flow

)h!"! a"! %ou" sim(li%yin. assum(tions mad! to th! com(l!3 %lo& o%%luids to ma+! th! analysis !asi!"

1. The fluid is nonviscous int!"nal %"iction is n!.l!ct!d

2. The flow is steady th! *!locity o% !ach (oint "!mains constant

. The fluid is inco!pressi"le th! d!nsity "!mains constant

#. The flow is irrotational th! %luid has no an.ula" mom!ntumaout any (oint


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$trea!lines$trea!lines

)h! (ath th! (a"ticl! ta+!s in

st!ady %lo& is a st"!amlin!

)h! *!locity o% th! (a"ticl! istan.!nt to th! st"!amlin!

s!t o% st"!amlin!s is call!d atube of flow


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Fluid FlowFluid Flow

7olum! %lo& "at!8 7/t 9 d/t 9 * :m/s;

Continuity81 *19 2*2

i.e., %lo& "at! th! sam! !*!"y&h!"!

e.g., %lo& o% "i*!"

Fluid %lo& &ithout %"iction


7/2201/14/16 Physics 201, UW-Madison

lect25 fluda dinamik.ppt

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