✦ LIBER ✦

Turbulent mixing in dilute polymer solutions

✍ Scribed by V.V. Ranade; R.A. Mashelkar

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 934 KB
Volume: 48
Category: Article
ISSN: 0009-2509
DOI: 10.1016/0009-2509(93)80122-7

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✦ Synopsis

Addition of polymer molecules to solvents influences the turbulence characteristics and in turn it influences the macromixing and micromixing behaviour in such flows in a profound way. The mixing lengths in pipe flows of dilute polymer solutions are known to be several times larger than those for Newtonian flows. A simple phenomenological model of polymer-turbulence interaction is developed to evaluate the reduction in friction factor and it is then used for analysing mixing in one-dimensional turbulent flows. The extent of mixing in dilute polymer solutions is then predicted quantitatively. The limited experimental data available show that the model simulates mixing in flows of Newtonian fluids as well as in mildly viscoelastic drag-reducing fluids very well.

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