PO 2430 Applied Fluid MEchanics QUIZ #3 Review

Quiz #3 Review Increases A Decreases B Remains the same C When velocity goes up, the Reynolds number…. Increases Decreases Remains the same A B The answer is: A Have TCs read and write their choice of best answer and vote using the red, yellow, green cards. They then turn to their partners and or tell their partner. C

Quiz #3 Review Increases A Decreases B Remains the same C When the density of the fluid goes up, the Reynolds number…. Increases Decreases Remains the same A B The answer is: A Have TCs read and write their choice of best answer and vote using the red, yellow, green cards. They then turn to their partners and or tell their partner. C

Quiz #3 Review Increases A Decreases B Remains the same C When dynamic viscosity goes up, the Reynolds number…. Increases Decreases Remains the same A B The answer is: A Have TCs read and write their choice of best answer and vote using the red, yellow, green cards. They then turn to their partners and or tell their partner. C

Quiz #3 Review Increases A Decreases B Remains the same C When the diameter of the pipe goes up, the Reynolds number…. Increases Decreases Remains the same A B The answer is: A Have TCs read and write their choice of best answer and vote using the red, yellow, green cards. They then turn to their partners and or tell their partner. C

Quiz #3 Review In the diagram shown, which number shows ideal flow? 1 2 3 A B The answer is: A Have TCs read and write their choice of best answer and vote using the red, yellow, green cards. They then turn to their partners and or tell their partner. C

Quiz #3 Review Turbulent flow A Laminar flow B Darcy’s Equation can be used for Turbulent flow Laminar flow Laminar and turbulent flow A B The answer is: A Have TCs read and write their choice of best answer and vote using the red, yellow, green cards. They then turn to their partners and or tell their partner. C

Quiz #3 Review Relative roughness A Friction factor B The following is not an example of a dimensionless number Relative roughness Friction factor Dynamic viscosity divided by density A B The answer is: A Have TCs read and write their choice of best answer and vote using the red, yellow, green cards. They then turn to their partners and or tell their partner. C

Quiz #3 Review Turbulent flow A Laminar flow B Transitional flow C Viscous forces are more important in the case of Turbulent flow Laminar flow Transitional flow A B The answer is: A Have TCs read and write their choice of best answer and vote using the red, yellow, green cards. They then turn to their partners and or tell their partner. C

Recommended Problems Reynolds numbers 8.3 8.5 8.8 8.9 8.15 Energy losses 8.27 8.28 8.31 8.32 8.38 8.39 8.41

Quiz #3 Review The wetted perimeter divide by the flow area A Hydraulic radius is defined as The wetted perimeter divide by the flow area The flow area divided by the wetter perimeter The flow area times the wetter perimeter A B The answer is: A Have TCs read and write their choice of best answer and vote using the red, yellow, green cards. They then turn to their partners and or tell their partner. C

Quiz #3 Review Four times the hydraulic radius A In order to calculate Reynolds Number or use Darcy’s Equation, the diameter term is replaced by Four times the hydraulic radius Two times the hydraulic radius The hydraulic radius A B The answer is: A Have TCs read and write their choice of best answer and vote using the red, yellow, green cards. They then turn to their partners and or tell their partner. C

Quiz #3 – Hydraulic Radius Determine the pressure drop for a 50-m length of a horizontal duct with the cross-sectional area shown below. Ethylene glycol at 25ºC is flowing at a rate of 0.16 m3/s. The inside dimension of the square is 250 mm and the outside dimension of the tube is 150 mm. Use 𝜀=3 × 10 −5 m. We calculated the following last class: A = 0.0448 m2 V = 3.57 m/s R = 0.0305 m (hydraulic radius) NR = 2.96x104