1 Foundation of Fluid Mechanics
17
Fig. 1.15 Joseph-Louis Lagrange (1736~1813, French mathematician and fluid
dynamician)
Fig. 1.16 Pierre-Simon Laplace (1749~1827, French mathematician and fluid mechanist)
In 1799, the Italian physicist G. B. Venturi (1746–1822) invented the
famous Venturi flowmeter (as shown in Fig. 1.17) by experimenting with
variable cross-sectional pipes. The pressure energy is transformed into kinetic
energy through the contraction section, and then kinetic energy is transformed into pressure energy through the diffusion section. Venturi tube uses
the combination of contraction and diffusion sections to measure the flow
rate. Using the Bernoulli energy equation, as shown in Fig. 1.18, the energy
17
Fig. 1.15 Joseph-Louis Lagrange (1736~1813, French mathematician and fluid
dynamician)
Fig. 1.16 Pierre-Simon Laplace (1749~1827, French mathematician and fluid mechanist)
In 1799, the Italian physicist G. B. Venturi (1746–1822) invented the
famous Venturi flowmeter (as shown in Fig. 1.17) by experimenting with
variable cross-sectional pipes. The pressure energy is transformed into kinetic
energy through the contraction section, and then kinetic energy is transformed into pressure energy through the diffusion section. Venturi tube uses
the combination of contraction and diffusion sections to measure the flow
rate. Using the Bernoulli energy equation, as shown in Fig. 1.18, the energy