Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Liquids are transported from one location to another using natural or constructed conveyance structures. The cross section of these structures may be open or closed at the top. The structures with closed tops are referred to as closed conduits like tunnels and pipes, while those with the top open are called open channels like rivers, streams, estuaries etc. The properties and the analyses of these flows are discussed in this book.
In this chapter, commonly used terminology are first defined including free-surface flows, pressurized flows, hydraulic grade line, piezometric and velocity heads. Following that, the classification of flows is covered beginning with flow classification based on time or distance criterion, as well as the effect of viscous and gravitational forces on flow classification in open channels. Then, the terminology and properties of a channel section are outlined including the cross-sectional flow area, wetted perimeter, hydraulic radius, top width, and hydraulic depth for different open channel cross sections. To account for nonuniform velocity distribution at a channel section, expressions for the energy and momentum coefficients are then developed. A discussion of the pressure distribution in a channel section whether with parallel or curvilinear flow is followed. Reynolds transport theorem is then briefly addressed to simplify the presentation of its applications in later chapters. Finally, the chapter concludes with a brief overview of the most prevalent hydraulic models used in open channel analysis, as well as the use of dimensional analysis.
Liquids are transported from one location to another using natural or constructed conveyance structures. The cross section of these structures may be open or closed at the top. The structures with closed tops are referred to as closed conduits like tunnels and pipes, while those with the top open are called open channels like rivers, streams, estuaries etc. The properties and the analyses of these flows are discussed in this book.
In this chapter, commonly used terminology are first defined including free-surface flows, pressurized flows, hydraulic grade line, piezometric and velocity heads. Following that, the classification of flows is covered beginning with flow classification based on time or distance criterion, as well as the effect of viscous and gravitational forces on flow classification in open channels. Then, the terminology and properties of a channel section are outlined including the cross-sectional flow area, wetted perimeter, hydraulic radius, top width, and hydraulic depth for different open channel cross sections. To account for nonuniform velocity distribution at a channel section, expressions for the energy and momentum coefficients are then developed. A discussion of the pressure distribution in a channel section whether with parallel or curvilinear flow is followed. Reynolds transport theorem is then briefly addressed to simplify the presentation of its applications in later chapters. Finally, the chapter concludes with a brief overview of the most prevalent hydraulic models used in open channel analysis, as well as the use of dimensional analysis.
BASIC CONCEPTS
Chaudhry, M. Hanif (Autor:in)
Open-Channel Flow ; Kapitel: 1 ; 1-30
01.01.2022
30 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
| Springer Verlag | 2008
| Springer Verlag | 2014
| Wiley | 2010
| Wiley | 2004
| Springer Verlag | 2018