Topic 5

Question 1

What is Turbulent flow?

Answer 1

Above a critical pressure, laminar flow starts swirling.

Question 2

What is the Reynold’s number?

Answer 2

Determines if a flow is laminar or not

Question 3

Equation to calculate the reylonds number

Answer 3

N_R=2ρv_meanR/η

Question 4

Reynolds number of turbulent and laminar flow.

Answer 4

>3000 (Turbulent)

<2000 (Laminar)

Question 5

What causes the noise of arteries when taking blood pressure?

Answer 5

Turbulent flow

Question 6

Give the equation of Flow Resistance

Answer 6

R_f = ΔP/Q

Question 7

Give the equation of Flow Resistance with Laminar Flow

Answer 7

R_f = (8ηl)/(πR⁴)

Question 8

Calculate the flow resistance of paralell tubes.

Answer 8

1/R_p = 1/R_f1 + 1/R_f2 +…….

If they are of equal resistance:

R_p = R_f1/N

Question 9

Calculate the flow resistance of Serial tubes

Answer 9

R_s = R_f1 + R_f2 + R_f3 +….