Next Article in Journal
Information-Theoretic Bounded Rationality and ε-Optimality
Previous Article in Journal
Spatiotemporal Scaling Effect on Rainfall Network Design Using Entropy
Open AccessArticle

Entropy Production in Pipeline Flow of Dispersions of Water in Oil

Department of Chemical Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada
Entropy 2014, 16(8), 4648-4661; https://doi.org/10.3390/e16084648
Received: 23 July 2014 / Revised: 4 August 2014 / Accepted: 15 August 2014 / Published: 19 August 2014
(This article belongs to the Section Thermodynamics)
Entropy production in pipeline adiabatic flow of water-in-oil emulsions is investigated experimentally in three different diameter pipes. The dispersed-phase (water droplets) concentration of emulsion is varied from 0 to 41% vol. The entropy production rates in emulsion flow are compared with the values expected in single-phase flow of Newtonian fluids with the same properties (viscosity and density). While in the laminar regime the entropy production rates in emulsion flow can be described adequately by the single-phase Newtonian equations, a significant deviation from single-phase flow behavior is observed in the turbulent regime. In the turbulent regime, the entropy production rates in emulsion flow are found to be substantially smaller than those expected on the basis of single-phase equations. For example, the entropy production rate in water-in-oil emulsion flow at a dispersed-phase volume fraction of 0.41 is only 38.4% of that observed in flow of a single-phase Newtonian fluid with the same viscosity and density, when comparison is made at a Reynolds number of 4000. Thus emulsion flow in pipelines is more efficient thermodynamically than single-phase Newtonian flow. View Full-Text
Keywords: emulsion; dispersion; entropy generation; pipeline flow; exergy destruction emulsion; dispersion; entropy generation; pipeline flow; exergy destruction
MDPI and ACS Style

Pal, R. Entropy Production in Pipeline Flow of Dispersions of Water in Oil. Entropy 2014, 16, 4648-4661.

Show more citation formats Show less citations formats

Article Access Map by Country/Region

1
Only visits after 24 November 2015 are recorded.
Back to TopTop