Ask Question
EngineeringEngineering
15 August, 12:29

The Reynolds number is a dimensionless group defined for a fluid flowing in a pipe as Re Durho/μ whereD is pipe diameter, u is fluid velocity, rho is fluid density, and μ is fluid viscosity. When the value of the Reynolds number is less than about 2100, the flow is laminar-that is, the fluid flows in smooth streamlines. For Reynolds numbers above 2100, the flow is turbulent, characterized by a great deal of agitation. Liquid methyl ethyl ketone (MEK) flows through a pipe with an inner diameter of 2.067 inches at an average velocity of 0.48 ft/s. At the fluid temperature of 20°C the density of liquid MEK is 0.805 g/cm3 and the viscosity is 0.43 centipoise [1 cP 1:00 103 kg / m s]. Without using a calculator, determine whether the flow is laminar or turbulent. Show your calculations.

+3
Answers (1)
  1. 15 August, 12:56
    0
    the flow is turbulent

    Explanation:

    The Reynolds number is given by

    Re=ρVD/μ

    where

    V=fluid speed=0.48ft/s=0.146m/s

    D=diameter=2.067in=0.0525m

    ρ=density=0.805g/cm^3=805Kg/m^3

    μ=0.43Cp=4.3x10^-4Pas

    Re = (805) (0.146) (0.0525) / 4.3x10^-4=14349.59

    Re>2100 the flow is turbulent

    Note: if you do not want to use a calculator you can use the graphs to calculate the Reynolds number according to their properties
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “The Reynolds number is a dimensionless group defined for a fluid flowing in a pipe as Re Durho/μ whereD is pipe diameter, u is fluid ...” in 📗 Engineering if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers
You Might be Interested in
Codes of ethics state the engineer's duties to society, to employers, to clients, to colleagues, to subordinates, and to the profession. However, when these duties conflict, which group should take precedence? a. Employers and clients b.
Answers (1)
If the middle bend of a three-bend saddle is a 30-degree bend
Answers (2)
A copper alloy cylinder 1.17 m long with a diameter of 32.39 mm is subjected to a tensile stress of 1,302 psi along its length. Assuming this applied stress is purely elastic calculate the diameter, in mm, of the cylinder under this load.
Answers (1)
Which of the following should NOT be done to keep people from slipping on floors?
Answers (2)
Given the strings s1 and s2, not necessarily of the same length, create a new string consisting of alternating characters of s1 and s2 (that is, the first character of s1 followed by the first character of s2, followed by the second character of s1,
Answers (1)
New Questions in Engineering
2. How can manual SA welding gun movement be performed?
Answers (1)
The format_address function separates out parts of the address string into new strings: house_number and street_name, and returns: "house number X on street named Y".
Answers (1)
A hard real-time system has been developed to for a fly-by-wire aviation system. It has sensors for the following pilot interface systems: System Sampling Frequency (Hz) CPU time required (ms) Yoke 20 5 Rudder pedals 15 2 Throttle 10 1 Overhead of
Answers (1)
An insulated rigid tank of volume 8 m3 initially contains air at 600 kPa and 400 K. A valve connected to the tank is opened, and air escapes until the pressure inside the tank is 200 kPa.
Answers (1)
Eutectic product in Fe-C system is called A. Pearlite B. Bainite C. Ledeburite D. Spheroidite
Answers (1)
Home » Engineering » The Reynolds number is a dimensionless group defined for a fluid flowing in a pipe as Re Durho/μ whereD is pipe diameter, u is fluid velocity, rho is fluid density, and μ is fluid viscosity.
Sign In
Ask Question
Menu
Subjects