A numerical investigation of the heat transfer characteristics of water-based mango bark nanofluid flowing in a double-pipe heat exchanger.

E J Onyiriuka, O O Ighodaro, A O Adelaja, D R E Ewim, S Bhattacharyya

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Article in Heliyon, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

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2citing papers in PubMed

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2 citing papers in PubMed, 34 citations in OpenAlex.

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5 authors at 3 institutions in 3 countries.

E J OnyiriukaDepartment of Mechanical Engineering, University of Benin, PMB 1154, Benin City, Edo State, Nigeria.

O O IghodaroDepartment of Mechanical Engineering, University of Benin, PMB 1154, Benin City, Edo State, Nigeria.

A O AdelajaDepartment of Mechanical Engineering, University of Lagos, Akoka-Yaba, Lagos, Nigeria.

D R E EwimDepartment of Mechanical and Aeronautical Engineering, University of Pretoria, Private Bag X20, Hatfield, Pretoria, 0028, South Africa.

S BhattacharyyaDepartment of Mechanical and Aeronautical Engineering, University of Pretoria, Private Bag X20, Hatfield, Pretoria, 0028, South Africa.

University of Benin · NGUniversity of Pretoria · ZAUniversity of Lagos · NG

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No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In this study, the heat transfer characteristics of a new class of nanofluids made from mango bark was numerically simulated and studied during turbulent flow through a double pipe heat exchanger. A range of volume fractions was considered for a particle size of 100 nm. A two-phase flow was considered using the mixture model. The mixture model governing equations of continuity, momentum, energy and volume fraction were solved using the finite-volume method. The results showed an increase of the Nusselt number by 68% for a Reynolds number of 5,000 and 45% for a Reynolds number of 13 000, and the heat transfer coefficient of the nanofluid was about twice that of the base fluid. In addition, the Nusselt number decreased by an average value of 0.76 with an increase of volume fraction by 1%. It was also found that there was a range of Reynolds numbers in which the trend of the average heat transfer coefficient of the nanofluid was completely reversed, and several plots showing zones of higher heat transfer which if taken advantage of in design will lead to higher heat transfer while avoiding other zones that have low heat transfer. It is hoped that these results will influence the thermal design of new heat exchangers.

Indexed as

Bio-nanoparticleChemical engineeringDouble-pipe heat exchangerEnergyHeat transferMechanical engineeringMixture modelNanotechnology

Identifiers

PMID31538112

DOI10.1016/j.heliyon.2019.e02416

PMCPMC6745410

OpenAlexW2972819647

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LicenceCC BY-NC-ND

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.