For cross flow over a long cylinder, what is the appropriate length parameter to beused in Reynolds or Nusselt number?Length.Diameter.Radius. The critical Reynolds number for external flow (which started as a laminar flow) overthin flat plate is|1700500,0002300Depends on fluid properties.

For cross flow over a long cylinder, diameter is the appropriate length parameter to be used in…

Answered: The critical Reynolds number for…

The critical Reynolds number for external flow (which started as a laminar flow) over thin flat plate is |1700 500,000 2300 Depends on fluid properties.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter7: Forced Convection Inside Tubes And Ducts

Section: Chapter Questions

Problem 7.35P

See similar textbooks

Related questions

Q: 8-25. The uniform pole has a weight of 30 lb and a length of 26 ft. Determine the maximum distance d…

A: Answer: The maximum distance d it can be placed from the smooth wall and not slip is 13.4 ft.

Q: 3- The nails are on both sides of the beam and each can resist a shear of 2 kN. In addition to the…

A: The free-body diagram is as shown in the figure below, As indicated the shear diagram is shown…

Q: 20. At inlet to a certain nozzle, the specific enthalpy of the fluid passing is 3000 kl/kg and the…

Q: ar the given beam find maximum slope and maximum deflectior t B. Take E= 200KN/mm2 and /= 100 x 10 m…

Q: 1. A centrifugal fan is delivering 2000 cfm of air at a total pressure differential of 2 in.w. The…

A: Dear student, According to the guidelines I am allowed to answer only three…

Q: 6-123. Seyment A of the compoite beam is made from 2014-T6 aluminum aloy and segment Bs A36 steel.…

Q: Problem 7.10 A thin circular disc of uniform thickness and of radius b is built up of two concentric…

A: A thin circular disc of uniform thickness and radius b is made up of two concentric parts, with a…

Q: Block A has a mass of 4 kg and block 8 of 4 kg Neglecting the mass of the pulleys, find the tension…

Q: Find out the total convective heat transfer rate from the board in Example 2B.2 (solve the bolded…

Q: Q6/ Water at 15°C is to be heated to 65°C by passing it over a bundle of 4-m-long 1-cm-diameter…

Q: For the prismatic bar in simple tension shown below, the stress state at any point "M" is…

Q: A simply supported beam with span of 8 m is subjected to a counterclockwise moment at the left…

A: Given Data The length of the beam is:L=8m The yield strength of the steel beam is:Fy=248 MPa The…

Q: Q5/ A machine of mass 75 kg are mounted on springs and is fitted with a dashpot to damp out…

A: Answer: (a) The resistance of the dashpot at unit velocity is 423.5 N/(m/s). (b) The ratio of the…

Q: Q4. Two are applied to the pipe AB as shown. Knowing that the pipe has inner and outer diameters…

A: Answer: (a) At point A: Normal stress = 20.4 MPa ; Shear stress = 14.34 MPa. (b) At point B: Normal…

Q: he conveyor belt is moving downward at 5 m/s. If the coefficient of static friction between the…

A: Given:v=5 m/sm=12 kgμk=0.71

Q: Hot water (specific heat of 4.18 Kj/kgK) at 66C is flowing through a metal pipe (6 m long, 2 cm ID,…

Q: 2kN/m 3- The nails are on both sides of the beam and each can resist a shear of 2 kN. In addition to…

Q: The two forces and a couple acting on the beam are equivalent to a single force acting at C.…

Q: A certain cable, 504.76 ft long is suspended between two supports at the same elevation and 500 ft…

Q: In an RL circuit, if R = 100 n, L= 1.0 H, the time constant T O A. 10 ms ОВ. 1 ms O C. 0.01 ms O…

A: Given Data : RL Circuit R=100 ohmL=1.0 H

Q: Power can be generated in principle by utilizing the naturally occurring decrease with depth of the…

Q: lq * (0.000001 84)] v = TT * q- Flow rate (STB per Day) v- Fluid velocity within pipe d- Pipe…

A: The nature of flow whether it is laminar or turbulent is determined by the Reynolds number which can…

Q: A material is deformed under a pure shear stress as shown in the following figure. Calculate the…

Q: Problem 9: Find the Slope and deflection at B and C for a cantilever beam of L subjected to a load…

Q: Determine the flowrate. Q = i ft/s

Q: 2KN/m 3- The nails are on both sides of the beam and each can resist a shear of 2 kN. In addition to…

Q: 2.44 The figure shows the cross section of a circular steel tube that is filled wit concrete and…

A: Given Data The axial load is:P=200 kip The modulus of elasticity of steel is:Est=29×106 psi The…

Q: 2kN/m 3- The nails are on both sides of the beam and each can resist a shear of 2 kN. In addition to…

Q: Find the Destination Numbers of following Refrigerant chemical fo No. Refrigerant Chemical form CO2…

A: Hi and thank you for the questions. Since you have asked questions with multiple subparts, we will…

Q: 3- The nails are on both sides of the beam and each can resist a shear of 2 kN. In addition to the…

Q: An unknown gas is flowing through a venturi meter whose diameters as shown. Gage pressures are…

Q: what is the COP of this refrigeration system.

A: Condenser temperature, Tc=40oCEvaporator 1 and 2 temperature, Te,1,2=-10oCEvaporator 3 temperature,…

Q: All surfaces (inclined or horizontal) are m frictionless. V = 0 A particle of mass m is released…

Q: The inlet section of a vacuum cleaner is a rectangle 1 in x 5 in. The blower is able to provide…

Q: The steel bolt of cross-sectional area A0 is placed inside the aluminum tube, also of…

A: Given, Cross-sectional area of Aluminum tube = A0 Young's modulus of Aluminum = Eal = 10 x 106 psi…

Q: Derive the formula for the nonflow work in terms of P1, V1 and V2 only for a constant temperature…

Q: H.W:What is the manometer reading, h, for the flow shown in fig. below? 0.37 m Free 0.08 m diameter…

Q: 3.- You have rifampicin crystals with an average size of 0.3 mm in diameter, to prepare hard gelatin…

A: given; which mill would you use for this particle size reduction process. what meshes would you use…

Q: 5. An ideal compressor compresses 12 kg/min of air isothermally from 99 kPa and a specific volume of…

Q: Consider the manometer exposed in the environment with a local pressure of 228 torrsg and the local…

A: Answer: Fluid-R Fluid-L (a) Density 5651.61 kg/m3 43959.20 kg/m3 (b) Specific gravity…

Q: What is the hydraulic fluid pou O A) -21° C O B) -31° C C) -40° C

A: Given Data : Operating Temperature(T)=-200C

Q: A Blasius exact solution equation for a laminar flat-plate boundary layer problem which derived from…

A: we know that Cd=0.95 to 0.98the given condition CdRe=1.27Re=0.951.27Re=1.78

Q: What are some important considerations when performing a handgrip dynamometer test?

A: Soln:- The important consideration when performing a handgrip dynometer test :- 1.This instrument is…

Q: A crawler crane will be located on a temporary work platform. The total resultant vertical load due…

A: To find the maximum angle of the wrecking ball going to be at the maximum height at which all…

Q: Psychrometry is the study of the properties of mixtures of airandwatervapour. Atmospheric air is a…

Q: A material is deformed under a pure shear stress as shown in the following figure. Calculate the…

Q: Assuming double sheâf ifn all pin developed in the pins at B andC. Use a pin diameter of 16 mm in…

A: d=16mm

Q: A(x,y) y = 2x /y = ? R Figure 6 1 Let R be the region of integration bounded by the curve y = 2x and…

Q: How can I use dimensional analysis to show that in this problem both Froude's number and Reynold's…

Q: 3-a- establish an expression in terms of the volume ratio of compression for the ideal thermal…

Concept explainers

Properties of Fluids

The term fluid represents a type of substance that can easily change its shape under any external pressure/force and can flow. Fluids can acquire any shape in which it is stored and can resist normal stresses but cannot resist shear stress in rest condition. Whenever external shear stress is applied to fluids, it starts to flow. The fluids may be liquid or gas. Example- water, air, etc.

Question

For cross flow over a long cylinder, what is the appropriate length parameter to be
used in Reynolds or Nusselt number?
Length.
Diameter.
Radius.

The critical Reynolds number for external flow (which started as a laminar flow) over
thin flat plate is
|1700
500,000
2300
Depends on fluid properties.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

A- Womersley number (a) of a human aorta is 20 and for the rabbit aorta is 17, the blood density is approximately the same across the species. The values of viscosity were 0.0035 Ns/m² for the human and 0.0040 Ns/m² for the rabbit. The diameter of the aorta is 2.0 cm for the man, and 0.7 cm for the rabbit, estimate the heart rate beats per minute (bpm) for both species
COE0051 FLUID MECHANICS 2 PROPERTIES OF FLUIDS Section Break (Continuous)- 1. A 30x60 cm plate is pulled through the oil with viscosity of 0.05 kg/m-s. The distance between the parallel plates are 1.5 cm. If the plate is need to pull at the rate of 0.4 m/s, what is the force needed to attain this velocity? FIXED PLATE лиши 1.5 cm FIXED PLATE October 20, 2022 .5 cm 1.0 cm .4 m/s
A well with 4 in. radius produces oil with a viscosity of0.3 cP, at a rate of 200 barrels/day, from a reservoir that is 15 ft.thick. The pressure in the wellbore as a function of time is: t (mins) 1 5 10 20 30 60 Pw(psi) 4740 4667 4633 4596 4573 4535 Use the "semi-log straight line" method to estimate the permeability, K
B2) An automotive engine can be assumed as rectangular block with approximation size 0.4 m high, 0.6 m wide, and 0.7 m long as shown in Figure 6. The ambient air is at 1 atm and 15°C where air density (P) = 1.225 kg/m and kinematic viscosity (v) = 1.47x105 m2/s. Air 85km/h 15°C Engine Block Figure 6 a) Calculate the friction coefficient (C) and investigate the force acting on the bottom surface of the engine block as the car travels at the velocity of 85 km/h. Assume the flow to be turbulent (Cr = 0.074/Re5) over the entire surface because of the constant agitation of the engine block. b) An engine oil at 40°C with kinematic viscosity (v) = 2.485×104 m³/s is flowing over a long flat plate with velocity of 4 m/s. Determine the critical distance xer from the leading edge of the plate where the flow become turbulent (Recr = 5x105), and analyze the thickness of the boundary layers over a length of 2xer. Given boundary layer thickness for laminar flow is, öx = 4.91x/Re,2 and turbulent flow,…
Mott ." cometer, which we can analyze later in Chap. 7. A small ball of diameter D and density p, falls through a tube of test liquid (p. µ). The fall velocity V is calculated by the time to fall a measured distance. The formula for calculating the viscosity of the fluid is discusses a simple falling-ball vis- (Po – p)gD² 18 V This result is limited by the requirement that the Reynolds number (pVD/u) be less than 1.0. Suppose a steel ball (SG = 7.87) of diameter 2.2 mm falls in SAE 25W oil (SG = 0.88) at 20°C. The measured fall velocity is 8.4 cm/s. (a) What is the viscosity of the oil, in kg/m-s? (b) Is the Reynolds num- ber small enough for a valid estimate?
The following rheological data were collected on a new "Thick 'n Spicy" brand of tomato catsup at 20°C and 90 kPa. rate of shear (s") shear stress (Pa) 10.0 20.4 20.0 21.5 40.0 23.0 60.0 25.0 80.0 26.5 (a) Plot these measured values on graph-paper. Which class of fluid does the catsup belong to?
The following rheological data were collected on a new "Thick 'n Spicy" brand of tomato catsup at 20°C and 90 kPa. rate of shear (s') shear stress (Pa) 10.0 20.4 20.0 21.5 40.0 23.0 60.0 25.0 80.0 26.5 (a) Plot these measured values on graph-paper. Which class of fluid does the catsup belong to? (b) Write the appropriate model for describing the rheological behavior of "Thick 'n Spicy" catsup. Specify the numerical value(s) and the units of the associated constant(s). (c) What shear stress is expected when the rate of shear, under vigorous shaking of a bottle of "Thick 'n Spicy", is 150 s?
1. Any equation that comes out of the differential approach is valid at every point in the flow field. On the other hand, the integral approach gives us a point by point value and not an average value. True or False 2. During the analysis of fluid flow, we are more often interested in obtaining the average velocity, and one of the common ways of obtaining the average velocity is to take an average across the flow cross-section. This is called area-average velocity, average along the direction parallel to the principal direction of flow. True or False 3. A crude oil with a density of 875 kilogram per cubic meter is pumped and flowing at 1.5 meter per second through a pipeline 1 meter in diameter. The maximum viscosity of the oil to exhibit a laminar flow behavior is 625 centipoise. True or False
navier stokes
If the hematocrit of John's blood wereto change from 42% to 55% and at the same time the diameter of one ofJohn's vessels were to decrease by 1%. Using Poisselle's equation, by how much(and in what direction) would John's blood pressure have to change inorder to maintain the same volume flow rate?
d) Calculate the mass flow rate per unit width of an ideal flow going through the same height as the boundary layer thickness. e) Through calculation relate the difference between the mass flow rates in parts (c) and (d) to the local boundary layer displacement thickness. In not more than 60 word justify your answer. Use sketch(s) to illustrate your justification. f) Does the assumed velocity profile satisfy the pressure boundary condition? In not more than 30-40 words and including the use of an appropriate equation justify your answer.
For the flow geometry from the top of a flat plate, the velocity profile around the plate is given as v (y) = ay+by^2-cy^3, and the temperature profile as T (y) = d+ey+fy^2-gy^3. Derive the mathematical expressions that give the regression coefficient and the heat transfer coefficient. CREATE THE KNOWN AND UNKNOWN BY DRAWING THE SHAPE OF THE ORGANIZATION AND WRITE ALL THE ASSUMPTIONS IN DETAIL