Pressure drop varies linearly with velocity for laminar flow in a pipe flow. At a large Reynold’s number encountered in turbulent flow, how do you anticipate pressure drop to vary with flow velocity? Just need a general direction help.
In Fig. 6.2-2, why does the f versus Re curve for turbulent flow lie above the curve for laminar flow rather than below? 1.0 0.5 0.2 0.1 Laminar 0.05 16 f= Re 0.02 Turbulent k/D 0.004 0.01 0.001 f 0.0791 Rel/4 0.0004 -0.0001 Hydraulically smooth" 0.005 0.002 10 106 105 0.001 102 103 104 Reynolds number Re D<ū> p/u Fig. 6.2-2. Friction factor for tube flow (see definition of f in Eqs. 6.1-2 and 6.1-3. ICurves of L. F. Moody,...
How is Ohm’s Law altered under conditions of turbulent flow relative to laminar flow? Consider what you know about the relationship between ∆P and flow. a. It is not altered. b.Flow is equal to resistance divided by driving pressure. incorrect c. Driving pressure is equal to 2 x Flow x Resistance. d. Driving pressure is proportional to Flow2.
The way a fluid flows can be characterized as laminar or turbulent or some mix of laminar and turbulent. The "Reynolds Number" is a calculation engineers use to describe the laminarity or turbulence of the flow. The above photograph from a wind tunnel shows air flow around a simple airfoil - laminar flow with evenly space streamlines (low Reynolds number) and turbulent flow with "corkscrewing streamlines (high Reynolds number). Questions: 1) The lift on an aircraft wing (see Bernoulli's principle)is...
65. The pressure drop along a length of artery is 100 Pa, the radius is 10 mm, and the flow is laminar. The average speed of the blood is 15 mm/s. (a) What is the net force on the blood in this section of artery? (b) What is the power expended maintaining the flow? 66. A small artery has a length of and a radius of . If the pressure drop across the artery'is 1.3 kPa, what's the flow rate...
Does Blasius' solution only apply for the Laminar Boundary Layer and not the Turbulent Boundary Layer?
24.54 The pressure gradient for laminar flow through a constant radius tube is given by where p-pressure (Nm, x (m's), and r= radius (m). distance along the tube's centerline (m), μ dynamic viscosity (N·sm2), Q-flow a. Determine the pressure drop for a 10-cm length tube for a viscous liquid (u 0.005 N s/m2, density - 1x 103 kgm)with a flow of 10x 10-5 m3/s and the following varying radii along its length, x, cm 2 r, mm 2 1.35 1.34...
The human heart delivers a blood flow of about 5000ml/min. The diameter of the blood vessel leaving the heart is 1.8cm. Determine the Re of the flow in this vessel. Is the flow laminar or turbulent? Explain. The smallest blood vessels have a diameter of 10mm and a total area about 1000 times greater than the area of the vessel leaving the heart. Determine the Re in a typical capillary. By what factor does the diameter of a capillary have...
The human heart delivers a blood flow of about 5000ml/min. The diameter of the blood vessel leaving the heart is 1.8cm. a. Determine the Re of the flow in this vessel. b. Is the flow laminar or turbulent? Explain. c. The smallest blood vessels have a diameter of 10m and a total area about 1000 times greater than the area of the vessel leaving the heart. Determine the Re in a typical capillary. d. By what factor does the diameter...
The human heart delivers a blood flow of about 5000ml/min. The diameter of the blood vessel leaving the heart is 1.8cm. a. Determine the Re of the flow in this vessel. b. Is the flow laminar or turbulent? Explain. The smallest blood vessels have a diameter of 10um and a total area about 1000 times greater than the area of the vessel leaving the heart. Determine the Re in a typical capillary. d. By what factor does the diameter of...