July 2017
Intermediate to advanced
816 pages
22h 16m
English
book
Fluid Mechanics for Chemical Engineers: with Microfluidics, CFD, and COMSOL Multiphysics 5
by James O. Wilkes
Content preview from Fluid Mechanics for Chemical Engineers: with Microfluidics, CFD, and COMSOL Multiphysics 5
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Chapter 2. Mass, Energy, and Momentum Balances
2.1 General Conservation Laws
THE study of fluid mechanics is based, to a large extent, on the conservation laws of three extensive quantities:
1. Mass—usually total, but sometimes of one or more individual chemical species.
2. Total energy—the sum of internal, kinetic, potential, and pressure energy.
3. Momentum, both linear and angular.
For a system viewed as a whole, conservation means that there is no net gain nor loss of any of these three quantities, even though there may be some redistribution of them within a system. A general conservation law can be phrased relative to the general system shown in Fig. 2.1, in which can be identified:
1. The system V.
2. The surroundings S.
3. The boundary ...
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