Next Article in Journal
A Lenient Causal Arrow of Time?
Next Article in Special Issue
Optimal Design of Nanoparticle Enhanced Phan-Thien–Tanner Flow of a Viscoelastic Fluid in a Microchannel
Previous Article in Journal
Generalized Weyl–Heisenberg Algebra, Qudit Systems and Entanglement Measure of Symmetric States via Spin Coherent States
Open AccessArticle

Entropy Production on the Gravity-Driven Flow with Free Surface Down an Inclined Plane Subjected to Constant Temperature

Department of Chemical and Environmental Technology, Inha Technical College, Incheon 22212, Korea
Entropy 2018, 20(4), 293;
Received: 22 March 2018 / Revised: 13 April 2018 / Accepted: 16 April 2018 / Published: 17 April 2018
(This article belongs to the Special Issue Entropy Production in Turbulent Flow)
The long-wave approximation of a falling film down an inclined plane with constant temperature is used to investigate the volumetric averaged entropy production. The velocity and temperature fields are numerically computed by the evolution equation at the deformable free interface. The dynamics of a falling film have an important role in the entropy production. When the layer shows an unstable evolution, the entropy production by fluid friction is much larger than that of the film with a stable flat interface. As the heat transfers actively from the free surface to the ambient air, the temperature gradient inside flowing films becomes large and the entropy generation by heat transfer increases. The contribution of fluid friction on the volumetric averaged entropy production is larger than that of heat transfer at moderate and high viscous dissipation parameters. View Full-Text
Keywords: falling film; entropy; long-wave approximation falling film; entropy; long-wave approximation
Show Figures

Figure 1

MDPI and ACS Style

Lee, J. Entropy Production on the Gravity-Driven Flow with Free Surface Down an Inclined Plane Subjected to Constant Temperature. Entropy 2018, 20, 293.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop