INTRO TO CONVECTION

Question 1

describe energy
transfer between a surface and a fluid moving over the surface.

Answer 1

convection

Question 2

energy transfer by both the bulk fluid motion

Answer 2

advection

Question 3

random motion of
fluid molecules

Answer 3

(conduction or diffusion).

Question 4

occurs at the surface of a volatile solid or liq
uid due to motion of a gas over the surface.

Answer 4

convection mass transfer

Question 5

(the boundary
layer) in which velocity gradients and shear stresses are large

Answer 5

thin fluid layer

Question 6

velocity gradients and shear stresses are negligible

Answer 6

region outside
the boundary laye

Question 7

It develops whenever there
is fluid flow over a surface, and it is of fundamental importance to problems involving
convection transport.

Answer 7

velocity boundary layer.

Question 8

velocity boundary layer

Answer 8

it provides the basis for determining the local friction coefficient

Question 9

a key dimensionless parameter from which the surface frictional drag may be deter
mined.

Answer 9

local friction coefficient

Question 10

must develop if the fluid free stream and surface temperatures
differ.

Answer 10

thermal boundary layer

Question 11

is the region of the fluid in which concentration gradients exist

Answer 11

concentration boundary layer