A. Flow regimes

In this section, flows past bodies of finite length will be considered. The emphasis will be on low-speed flow, which means that the velocity in the whole flow field should not exceed 30% of the speed of sound.

For high-speed flows past bodies, the reader is referred to special literature on gas dynamics; see Liepmann and Roshko (1957), Oswatitsch (1976 and 1977), Becker (1966), Zierep (1976), Shapiro (1954), and Tsien (1958)

The flow pattern past immersed bodies is characterized by the Reynolds number, defined as

\[\label{eq1} \mbox{Re}=\dfrac{\rho Vl}{\eta}=\frac{Vl}{\nu}\tag{1}\]