Next Article in Journal
A Novel Sequence-Based Feature for the Identification of DNA-Binding Sites in Proteins Using Jensen–Shannon Divergence
Next Article in Special Issue
Implementing Demons and Ratchets
Previous Article in Journal
Isothermal Oxidation of Aluminized Coatings on High-Entropy Alloys
Previous Article in Special Issue
Coupled Thermoelectric Devices: Theory and Experiment
Open AccessArticle

Second Law Analysis of Nanofluid Flow within a Circular Minichannel Considering Nanoparticle Migration

Mechanical Engineering Department, School of Energy, Kermanshah University of Technology, Kermanshah 6715685420, Iran
*
Author to whom correspondence should be addressed.
Academic Editor: Eliodoro Chiavazzo
Entropy 2016, 18(10), 378; https://doi.org/10.3390/e18100378
Received: 19 August 2016 / Revised: 14 October 2016 / Accepted: 18 October 2016 / Published: 21 October 2016
(This article belongs to the Special Issue Limits to the Second Law of Thermodynamics: Experiment and Theory)
In the current research, entropy generation for the water–alumina nanofluid flow is studied in a circular minichannel for the laminar regime under constant wall heat flux in order to evaluate irreversibilities arising from friction and heat transfer. To this end, simulations are carried out considering the particle migration effects. Due to particle migration, the nanoparticles incorporate non-uniform distribution at the cross-section of the pipe, such that the concentration is larger at central areas. The concentration non-uniformity increases by augmenting the mean concentration, particle size, and Reynolds number. The rates of entropy generation are evaluated both locally and globally (integrated). The obtained results show that particle migration changes the thermal and frictional entropy generation rates significantly, particularly at high Reynolds numbers, large concentrations, and coarser particles. Hence, this phenomenon should be considered in examinations related to energy in the field of nanofluids. View Full-Text
Keywords: nanofluid; second law of thermodynamics; entropy generation; particle migration; concentration distribution nanofluid; second law of thermodynamics; entropy generation; particle migration; concentration distribution
Show Figures

Figure 1

MDPI and ACS Style

Bahiraei, M.; Cheraghi Kazerooni, N. Second Law Analysis of Nanofluid Flow within a Circular Minichannel Considering Nanoparticle Migration. Entropy 2016, 18, 378.

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

1
Back to TopTop