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Transport Processes and Separation Process Principles (Includes Unit Operations) Fourth Edition by Christie John Geankoplis

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3.1. FLOW PAST IMMERSED OBJECTS AND PACKED AND FLUIDIZED BEDS

3.1A. Definition of Drag Coefficient for Flow Past Immersed Objects

1. Introduction and types of drag

In Chapter 2 we were concerned primarily with the momentum transfer and frictional losses for flow of fluids inside conduits or pipes. In this section we consider in some detail the flow of fluids around solid, immersed objects.

The flow of fluids outside immersed bodies appears in many chemical engineering applications and other processing applications. These occur, for example, in flow past spheres in settling, flow through packed beds in drying and filtration, flow past tubes in heat exchangers, and so on. It is useful to be able to predict the frictional losses and/or the force ...

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