Numerical Studies on Thermally Induced Flow of Nanofluid in a Vertical Annulus

Suhail Ahmad Khan, M. Altamush Siddiqui, Shahid Husain

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A numerical investigation of the thermally induced flow of nanofluid (Al2O3 + water) inside a vertical annulus has presently been carried out. The simulations are carried for various nanoparticle concentrations at a constant heat flux of 3 kW/m2 using computational fluid dynamics (CFD) solver ANSYS Fluent. Two viscosity models namely Brinkman and Buongiorno and thermal conductivity model of Maxwell’s are adopted to estimate heat transfer rates. Uncertainty in the results of heat transfer due to the adoption of two different formulae of viscosity is discussed in detail. The average heat transfer coefficient estimated on the basis of both viscosity models increases with nanoparticle concentration. Nanoparticle concentration has a much more pronounced effect on heat transfer coefficient when estimated on the basis of the Brinkman model. The heat transfer coefficient is found to enhance by 10.86% when estimated using the Brinkman viscosity model while it is only just 3.91% in the case of Buongiorno viscosity model-based nanofluids.

Original languageEnglish
Title of host publicationProceedings of International Conference in Mechanical and Energy Technology, ICMET 2019
EditorsSanjay Yadav, D.B. Singh, P.K. Arora, Harish Kumar
PublisherSpringer
Pages87-100
Number of pages14
ISBN (Print)9789811526466
DOIs
Publication statusPublished - 2020
Externally publishedYes
EventInternational Conference on Mechanical and Energy Technologies, ICMET 2019 - Greater Noida, India
Duration: 7 Nov 20198 Nov 2019

Publication series

NameSmart Innovation, Systems and Technologies
Volume174
ISSN (Print)2190-3018
ISSN (Electronic)2190-3026

Conference

ConferenceInternational Conference on Mechanical and Energy Technologies, ICMET 2019
Country/TerritoryIndia
CityGreater Noida
Period7/11/198/11/19

Keywords

  • Nanofluids
  • Natural convection
  • Thermophysical properties
  • Vertical annulus

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