LE 2: Friction Losses

Question 1

this uses fanning friction factor

Answer 1

skin losses

Question 2

it is the length of the boundary line where the pipe surface is in contact with the flowing fluid

Answer 2

wetted parameter

Question 3

Helps engineers design systems, choose pipe sizes, and figure out how powerful pumps need to be

Answer 3

fanning friction factor

Question 4

Measures that “slowing down” effect

Answer 4

fanning friction factor

Question 5

according to geankoplis, when the density varies by more than _______________, it is considered compressible flow

Answer 5

10%

Question 6

critical/asterisk condition is also referred to as?

Answer 6

choked

Question 7

in this flow, no friction loss at the entrance

Answer 7

compressible flow

Question 8

for incompressible fluid, the speed of the sound is?

Answer 8

infinite

Question 9

it is a dimensionless quantity in fluid dynamics representing the ratio of flow velocity past a boundary to the local speed of sound

Answer 9

mach number

Question 10

it is used to calculate the pressure drop (or head loss) due to friction in a pipe

Answer 10

fanning friction factor

Question 11

if this changes in direction/magnitude, additional fraction losses occur

Answer 11

velocity of fluid

Question 12

A measure of how much a pipe slows the fluid down due to friction

Answer 12

fanning friction factor

Question 13

according to perry’s, when the density varies by more than _______________, it is considered compressible flow

Answer 13

5-10%

Question 14

the length in the entrance and exit of the pipe section is called the?

Answer 14

transition length/entry length

Question 15

reservoir has usually v=0, referred to as?

Answer 15

stagnation properties