The flow of dilute aqueous solutions of macromolecules in various geometries. I. Introduction

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Abstract
Aqueous solutions of polyacrylamide, polyethylene oxide and 'Kelzan' (Xanthan gum, a polysaccharide) have been studied in flow through straight pipes of circular cross-section, through bent pipes of circular cross-section, through porous media and in the annular gap between rotating concentric cylinders. The objectives of the work are described. A summary of the behaviour of macromolecules in solution and details of their structure are also given; these will be used in subsequent discussion to form phenomenological theories.