申論題

1.(20 %) Please explain each of the terms in the following (2 pts each). (a) Reynold number, (b) molecular momentum flux, (c) Prandtl mixing length, (d) velocity potential, (e) Reynolds stress, (1) form drag, (8) fanning friction factor, (h) eddy diffusivity, (i) divergence of velocity, () creeping flow.