Determine the thermal entry lengths for laminar flow at 60 ◦ C and at a rate of 0.015 kg/s ofwater, ethylene glycol, and engine oil through a circular tube of inside diameter 2.5 cm and subjected to uniform wall temperature.

Determine the thermal entry lengths for laminar flow at 60 ◦ C and at a rate of 0.015 kg/s ofwater, ethylene glycol, and engine oil through a circular tube of inside diameter 2.5 cm and subjected to uniform wall temperature.

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 7.16P

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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.

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