Impacts of heat-conducting solid wall and heat-generating element on free convection of Al2O3/H2O nanofluid in a cavity with open border

Mikhail A. Sheremet, Hakan F. Oztop, Dmitriy V. Gvozdyakov, Mohamed E. Ali

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Development of modern electronic devices demands a creation of effective cooling systems in the form of active or passive nature. More optimal technique for an origination of such cooling arrangement is a mathematical simulation taking into account the major physical processes which define the considered phenomena. Thermogravitational convection in a partially open alumina-water nanoliquid region under the impacts of constant heat generation element and heat-conducting solid wall is analyzed numerically. A solid heat-conducting wall is a left vertical wall cooled from outside, while a local solid element is placed on the base and kept at constant volumetric heat generation. The right border is supposed to be partially open in order to cool the local heater. The considered domain of interest is an electronic cabinet, while the heat-generating element is an electronic chip. Partial differential equations of mathematical physics formulated in non-primitive variables are worked out by the second order finite difference method. Influences of the Rayleigh number, heat-transfer capacity ratio, location of the local heater and nanoparticles volume fraction on liquid circulation and thermal transmission are investigated. It was ascertained that an inclusion of nanosized alumina particles to the base liquid can lead to the average heater temperature decreasing, that depends on the heater location and internal volumetric heat generation. Therefore, an inclusion of nanoparticles inside the host liquid can essentially intensify the heat removal from the heater that is the major challenge in different engineering applications. Moreover, an effect of nanosized alumina particles is more essential in the case of low intensive convective flow and when the heater is placed near the cooling wall.

Original languageEnglish
Article number3434
JournalEnergies
Volume11
Issue number12
DOIs
Publication statusPublished - 1 Dec 2018

Fingerprint

Nanofluid
Free Convection
Natural convection
Cavity
Heat
Heat generation
Alumina
Cooling
Liquids
Electronics
Liquid
Nanoparticles
Inclusion
Cooling systems
Finite difference method
Partial differential equations
Volume fraction
Rayleigh number
Physics
Physical process

Keywords

  • Finite difference technique
  • Heat-conducting solid wall
  • Local heat-generating element
  • Nanofluid
  • Partially open cavity
  • Thermogravitational convection

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Energy (miscellaneous)
  • Control and Optimization
  • Electrical and Electronic Engineering

Cite this

Impacts of heat-conducting solid wall and heat-generating element on free convection of Al2O3/H2O nanofluid in a cavity with open border. / Sheremet, Mikhail A.; Oztop, Hakan F.; Gvozdyakov, Dmitriy V.; Ali, Mohamed E.

In: Energies, Vol. 11, No. 12, 3434, 01.12.2018.

Research output: Contribution to journalArticle

@article{16cdce8fc9274897941d7a17b30fbfc8,
title = "Impacts of heat-conducting solid wall and heat-generating element on free convection of Al2O3/H2O nanofluid in a cavity with open border",
abstract = "Development of modern electronic devices demands a creation of effective cooling systems in the form of active or passive nature. More optimal technique for an origination of such cooling arrangement is a mathematical simulation taking into account the major physical processes which define the considered phenomena. Thermogravitational convection in a partially open alumina-water nanoliquid region under the impacts of constant heat generation element and heat-conducting solid wall is analyzed numerically. A solid heat-conducting wall is a left vertical wall cooled from outside, while a local solid element is placed on the base and kept at constant volumetric heat generation. The right border is supposed to be partially open in order to cool the local heater. The considered domain of interest is an electronic cabinet, while the heat-generating element is an electronic chip. Partial differential equations of mathematical physics formulated in non-primitive variables are worked out by the second order finite difference method. Influences of the Rayleigh number, heat-transfer capacity ratio, location of the local heater and nanoparticles volume fraction on liquid circulation and thermal transmission are investigated. It was ascertained that an inclusion of nanosized alumina particles to the base liquid can lead to the average heater temperature decreasing, that depends on the heater location and internal volumetric heat generation. Therefore, an inclusion of nanoparticles inside the host liquid can essentially intensify the heat removal from the heater that is the major challenge in different engineering applications. Moreover, an effect of nanosized alumina particles is more essential in the case of low intensive convective flow and when the heater is placed near the cooling wall.",
keywords = "Finite difference technique, Heat-conducting solid wall, Local heat-generating element, Nanofluid, Partially open cavity, Thermogravitational convection",
author = "Sheremet, {Mikhail A.} and Oztop, {Hakan F.} and Gvozdyakov, {Dmitriy V.} and Ali, {Mohamed E.}",
year = "2018",
month = "12",
day = "1",
doi = "10.3390/en11123434",
language = "English",
volume = "11",
journal = "Energies",
issn = "1996-1073",
publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",
number = "12",

}

TY - JOUR

T1 - Impacts of heat-conducting solid wall and heat-generating element on free convection of Al2O3/H2O nanofluid in a cavity with open border

AU - Sheremet, Mikhail A.

AU - Oztop, Hakan F.

AU - Gvozdyakov, Dmitriy V.

AU - Ali, Mohamed E.

PY - 2018/12/1

Y1 - 2018/12/1

N2 - Development of modern electronic devices demands a creation of effective cooling systems in the form of active or passive nature. More optimal technique for an origination of such cooling arrangement is a mathematical simulation taking into account the major physical processes which define the considered phenomena. Thermogravitational convection in a partially open alumina-water nanoliquid region under the impacts of constant heat generation element and heat-conducting solid wall is analyzed numerically. A solid heat-conducting wall is a left vertical wall cooled from outside, while a local solid element is placed on the base and kept at constant volumetric heat generation. The right border is supposed to be partially open in order to cool the local heater. The considered domain of interest is an electronic cabinet, while the heat-generating element is an electronic chip. Partial differential equations of mathematical physics formulated in non-primitive variables are worked out by the second order finite difference method. Influences of the Rayleigh number, heat-transfer capacity ratio, location of the local heater and nanoparticles volume fraction on liquid circulation and thermal transmission are investigated. It was ascertained that an inclusion of nanosized alumina particles to the base liquid can lead to the average heater temperature decreasing, that depends on the heater location and internal volumetric heat generation. Therefore, an inclusion of nanoparticles inside the host liquid can essentially intensify the heat removal from the heater that is the major challenge in different engineering applications. Moreover, an effect of nanosized alumina particles is more essential in the case of low intensive convective flow and when the heater is placed near the cooling wall.

AB - Development of modern electronic devices demands a creation of effective cooling systems in the form of active or passive nature. More optimal technique for an origination of such cooling arrangement is a mathematical simulation taking into account the major physical processes which define the considered phenomena. Thermogravitational convection in a partially open alumina-water nanoliquid region under the impacts of constant heat generation element and heat-conducting solid wall is analyzed numerically. A solid heat-conducting wall is a left vertical wall cooled from outside, while a local solid element is placed on the base and kept at constant volumetric heat generation. The right border is supposed to be partially open in order to cool the local heater. The considered domain of interest is an electronic cabinet, while the heat-generating element is an electronic chip. Partial differential equations of mathematical physics formulated in non-primitive variables are worked out by the second order finite difference method. Influences of the Rayleigh number, heat-transfer capacity ratio, location of the local heater and nanoparticles volume fraction on liquid circulation and thermal transmission are investigated. It was ascertained that an inclusion of nanosized alumina particles to the base liquid can lead to the average heater temperature decreasing, that depends on the heater location and internal volumetric heat generation. Therefore, an inclusion of nanoparticles inside the host liquid can essentially intensify the heat removal from the heater that is the major challenge in different engineering applications. Moreover, an effect of nanosized alumina particles is more essential in the case of low intensive convective flow and when the heater is placed near the cooling wall.

KW - Finite difference technique

KW - Heat-conducting solid wall

KW - Local heat-generating element

KW - Nanofluid

KW - Partially open cavity

KW - Thermogravitational convection

UR - http://www.scopus.com/inward/record.url?scp=85059273501&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85059273501&partnerID=8YFLogxK

U2 - 10.3390/en11123434

DO - 10.3390/en11123434

M3 - Article

VL - 11

JO - Energies

JF - Energies

SN - 1996-1073

IS - 12

M1 - 3434

ER -