Natural convection of nanofluid inside a wavy cavity with a non-uniform heating: Entropy generation analysis

Mikhail Sheremet, Ioan Pop, Hakan F. Öztop, Nidal Abu-Hamdeh

Результат исследований: Материалы для журналаСтатья

34 Цитирования (Scopus)

Выдержка

Purpose: The main purpose of this numerical study is to study on entropy generation in natural convection of nanofluid in a wavy cavity using a single-phase nanofluid model. Design/methodology/approach: The cavity is heated non-uniformly from the wavy wall and cooled from the right side while it is insulated from the horizontal walls. The physical domain of the problem is transformed into a rectangular geometry in the computational domain using an algebraic coordinate transformation by introducing new independent variables j and h. The governing dimensionless partial differential equations with corresponding initially and boundary conditions were numerically solved by the finite difference method of the second-order accuracy. The governing parameters are Rayleigh number (Ra = 1000-100000), Prandtl number (Pr = 6.82), solid volume fraction parameter of nanoparticles (Φ = 0.0-0.05), aspect ratio parameter (A = 1), undulation number (k = 1-3), wavy contraction ratio (b = 0.1-0.3) and dimensionless time (τ = 0-0.27). Findings: It is found that the average Bejan number is an increasing function of nanoparticle volume fraction and a decreasing function of the Rayleigh number, undulation number and wavy contraction ratio. Also, an insertion of nanoparticles leads to an attenuation of convective flow and enhancement of heat transfer. Originality: The originality of this work is to analyze the entropy generation in natural convection within a wavy nanofluid cavity using single-phase nanofluid model. The results would benefit scientists and engineers to become familiar with the flow behaviour of such nanofluids, and will be a way to predict the properties of this flow for the possibility of using nanofluids in advanced nuclear systems, in industrial sectors including transportation, power generation, chemical sectors, ventilation, airconditioning, etc.

Язык оригиналаАнглийский
Страницы (с-по)958-980
Число страниц23
ЖурналInternational Journal of Numerical Methods for Heat and Fluid Flow
Том27
Номер выпуска4
DOI
СостояниеОпубликовано - 2017

Отпечаток

Nanofluid
Natural Convection
Natural convection
Heating
Cavity
Entropy
Nanoparticles
Volume fraction
Rayleigh number
Prandtl number
Volume Fraction
Dimensionless
Finite difference method
Partial differential equations
Ventilation
Power generation
Aspect ratio
Contraction
Sector
Boundary conditions

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Computer Science Applications
  • Applied Mathematics

Цитировать

Natural convection of nanofluid inside a wavy cavity with a non-uniform heating : Entropy generation analysis. / Sheremet, Mikhail; Pop, Ioan; Öztop, Hakan F.; Abu-Hamdeh, Nidal.

В: International Journal of Numerical Methods for Heat and Fluid Flow, Том 27, № 4, 2017, стр. 958-980.

Результат исследований: Материалы для журналаСтатья

@article{927ef1d11b0a41caaccfe31698929cb0,
title = "Natural convection of nanofluid inside a wavy cavity with a non-uniform heating: Entropy generation analysis",
abstract = "Purpose: The main purpose of this numerical study is to study on entropy generation in natural convection of nanofluid in a wavy cavity using a single-phase nanofluid model. Design/methodology/approach: The cavity is heated non-uniformly from the wavy wall and cooled from the right side while it is insulated from the horizontal walls. The physical domain of the problem is transformed into a rectangular geometry in the computational domain using an algebraic coordinate transformation by introducing new independent variables j and h. The governing dimensionless partial differential equations with corresponding initially and boundary conditions were numerically solved by the finite difference method of the second-order accuracy. The governing parameters are Rayleigh number (Ra = 1000-100000), Prandtl number (Pr = 6.82), solid volume fraction parameter of nanoparticles (Φ = 0.0-0.05), aspect ratio parameter (A = 1), undulation number (k = 1-3), wavy contraction ratio (b = 0.1-0.3) and dimensionless time (τ = 0-0.27). Findings: It is found that the average Bejan number is an increasing function of nanoparticle volume fraction and a decreasing function of the Rayleigh number, undulation number and wavy contraction ratio. Also, an insertion of nanoparticles leads to an attenuation of convective flow and enhancement of heat transfer. Originality: The originality of this work is to analyze the entropy generation in natural convection within a wavy nanofluid cavity using single-phase nanofluid model. The results would benefit scientists and engineers to become familiar with the flow behaviour of such nanofluids, and will be a way to predict the properties of this flow for the possibility of using nanofluids in advanced nuclear systems, in industrial sectors including transportation, power generation, chemical sectors, ventilation, airconditioning, etc.",
keywords = "Entropy generation, Nanofluid, Natural convection, Non-uniform heating, Numerical results, Wavy cavity",
author = "Mikhail Sheremet and Ioan Pop and {\"O}ztop, {Hakan F.} and Nidal Abu-Hamdeh",
year = "2017",
doi = "10.1108/HFF-02-2016-0063",
language = "English",
volume = "27",
pages = "958--980",
journal = "International Journal of Numerical Methods for Heat and Fluid Flow",
issn = "0961-5539",
publisher = "Emerald Group Publishing Ltd.",
number = "4",

}

TY - JOUR

T1 - Natural convection of nanofluid inside a wavy cavity with a non-uniform heating

T2 - Entropy generation analysis

AU - Sheremet, Mikhail

AU - Pop, Ioan

AU - Öztop, Hakan F.

AU - Abu-Hamdeh, Nidal

PY - 2017

Y1 - 2017

N2 - Purpose: The main purpose of this numerical study is to study on entropy generation in natural convection of nanofluid in a wavy cavity using a single-phase nanofluid model. Design/methodology/approach: The cavity is heated non-uniformly from the wavy wall and cooled from the right side while it is insulated from the horizontal walls. The physical domain of the problem is transformed into a rectangular geometry in the computational domain using an algebraic coordinate transformation by introducing new independent variables j and h. The governing dimensionless partial differential equations with corresponding initially and boundary conditions were numerically solved by the finite difference method of the second-order accuracy. The governing parameters are Rayleigh number (Ra = 1000-100000), Prandtl number (Pr = 6.82), solid volume fraction parameter of nanoparticles (Φ = 0.0-0.05), aspect ratio parameter (A = 1), undulation number (k = 1-3), wavy contraction ratio (b = 0.1-0.3) and dimensionless time (τ = 0-0.27). Findings: It is found that the average Bejan number is an increasing function of nanoparticle volume fraction and a decreasing function of the Rayleigh number, undulation number and wavy contraction ratio. Also, an insertion of nanoparticles leads to an attenuation of convective flow and enhancement of heat transfer. Originality: The originality of this work is to analyze the entropy generation in natural convection within a wavy nanofluid cavity using single-phase nanofluid model. The results would benefit scientists and engineers to become familiar with the flow behaviour of such nanofluids, and will be a way to predict the properties of this flow for the possibility of using nanofluids in advanced nuclear systems, in industrial sectors including transportation, power generation, chemical sectors, ventilation, airconditioning, etc.

AB - Purpose: The main purpose of this numerical study is to study on entropy generation in natural convection of nanofluid in a wavy cavity using a single-phase nanofluid model. Design/methodology/approach: The cavity is heated non-uniformly from the wavy wall and cooled from the right side while it is insulated from the horizontal walls. The physical domain of the problem is transformed into a rectangular geometry in the computational domain using an algebraic coordinate transformation by introducing new independent variables j and h. The governing dimensionless partial differential equations with corresponding initially and boundary conditions were numerically solved by the finite difference method of the second-order accuracy. The governing parameters are Rayleigh number (Ra = 1000-100000), Prandtl number (Pr = 6.82), solid volume fraction parameter of nanoparticles (Φ = 0.0-0.05), aspect ratio parameter (A = 1), undulation number (k = 1-3), wavy contraction ratio (b = 0.1-0.3) and dimensionless time (τ = 0-0.27). Findings: It is found that the average Bejan number is an increasing function of nanoparticle volume fraction and a decreasing function of the Rayleigh number, undulation number and wavy contraction ratio. Also, an insertion of nanoparticles leads to an attenuation of convective flow and enhancement of heat transfer. Originality: The originality of this work is to analyze the entropy generation in natural convection within a wavy nanofluid cavity using single-phase nanofluid model. The results would benefit scientists and engineers to become familiar with the flow behaviour of such nanofluids, and will be a way to predict the properties of this flow for the possibility of using nanofluids in advanced nuclear systems, in industrial sectors including transportation, power generation, chemical sectors, ventilation, airconditioning, etc.

KW - Entropy generation

KW - Nanofluid

KW - Natural convection

KW - Non-uniform heating

KW - Numerical results

KW - Wavy cavity

UR - http://www.scopus.com/inward/record.url?scp=85020729930&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85020729930&partnerID=8YFLogxK

U2 - 10.1108/HFF-02-2016-0063

DO - 10.1108/HFF-02-2016-0063

M3 - Article

AN - SCOPUS:85020729930

VL - 27

SP - 958

EP - 980

JO - International Journal of Numerical Methods for Heat and Fluid Flow

JF - International Journal of Numerical Methods for Heat and Fluid Flow

SN - 0961-5539

IS - 4

ER -