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х y x* %3D y* z* %3D 6. %3D и ひ* • and и* w* = %D L-

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.

Chapter5: Analysis Of Convection Heat Transfer

Section: Chapter Questions

Problem 5.2P: 5.2 Evaluate the Prandtl number from the following data: , .

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Concept explainers

Fluid Kinematics

The branch of science that deals with objects which are either in motion or stationary are studied under the branch of classical mechanics. Fluid mechanics is a subcategory of classical mechanics that deals with the behavior of fluids at rest (fluid statics) or in motion (posing some velocity). In fluid kinematics, studies focus on the associated motion of fluid particles or groups of particles, and its associated parameters like displacements, velocity, and acceleration without concerning about the forces that caused the motion. All the laws of classical mechanics are applied in the study of fluid kinematics.

Question

Volumetric strain rate is zero for a steady incompressible flow. In Cartesian coordinates we express this as ∂u/∂x + ∂?/∂y + ∂w/∂z = 0
Suppose the characteristic speed and characteristic length for a given flow field are V and L, respectively. Define the following dimensionless variables, Nondimensionalize the equation, and identify any established (named) dimensionless parameters that may appear. Discuss.

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