Special Issue "Applications of Nanofluids – II"

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Synthesis, Interfaces and Nanostructures".

Deadline for manuscript submissions: 29 July 2022.

Special Issue Editor

Special Issue Information

Dear Colleagues,

The present Special Issue is a continuation of previous successful Special Issue entitled “Applications of Nanofluids”. It is well-known that nowadays nanofluids can be found in different engineering fields including heat exchangers, solar collectors, electronics, vehicle engines and many others. Such positive applications of nanofluids can be explained by a rise of nanofluid’s thermal conductivity and as a result, an increase in heat transfer rate is expected. It should be highlighted that nanoparticles are widely used in medicine as an effective addition to different coatings, or nanoparticles from biodegradable polymers can function very well as a transport vector for drugs. Such wide applications of nanofluids and nanoparticles can be enhanced due to detailed investigations of ‘transport processes within these suspensions. Therefore, theoretical and experimental methods are very effective techniques for the aforementioned analysis. Theoretical methods including analytical and numerical simulation allow for obtaining useful outcomes without the preparation of stable nanofluids, while experimental techniques allow understanding of the analyzed processes and also for obtaining the necessary data for validation of the developed mathematical models and numerical methods.

The present Special Issue will focus on nanofluid applications in various engineering systems. This is a great opportunity to combine original manuscripts on the considered topic to present useful guidelines for future researches.

Prof. Dr. Mikhail Sheremet
Guest Editor

Manuscript Submission Information

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Keywords

  • Heat transfer enhancement
  • Heat exchangers
  • Solar collectors
  • Electronics cooling
  • Nano-enhanced phase change materials
  • Targeted drug delivery

Published Papers (1 paper)

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Research

Article
Evaluation of Multiple Semi-Twisted Tape Inserts in a Heat Exchanger Pipe Using Al2O3 Nanofluid
Nanomaterials 2021, 11(6), 1570; https://0-doi-org.brum.beds.ac.uk/10.3390/nano11061570 - 15 Jun 2021
Cited by 5 | Viewed by 983
Abstract
The hydrothermal performance of multiple semi-twisted tape inserts inside a heat exchanger pipe is numerically examined in three-dimensions. This study aims to find the optimum case for having the highest heat transfer enhancement with the lowest friction factor using nanofluid (Al2O [...] Read more.
The hydrothermal performance of multiple semi-twisted tape inserts inside a heat exchanger pipe is numerically examined in three-dimensions. This study aims to find the optimum case for having the highest heat transfer enhancement with the lowest friction factor using nanofluid (Al2O3/water). A performance evaluation criterion (PEC) is defined to characterize the performance based on both friction factor and heat transfer. It was found that increasing the number of semi-twisted tapes increases the number of swirl flow streams and leads to an enhancement in the local Nusselt number as well as the friction factor. The average Nusselt number increases from 15.13 to 28.42 and the average friction factor enhances from 0.022 to 0.052 by increasing the number of the semi-twisted tapes from 0 to 4 for the Reynolds number of 1000 for the base fluid. By using four semi-twisted tapes, the average Nusselt number increases from 12.5 to 28.5, while the friction factor reduces from 0.155 to 0.052 when the Reynolds number increases from 250 to 1000 for the base fluid. For the Reynolds number of 1000, the increase in nanofluid concentration from 0 to 3% improves the average Nusselt number and friction factor by 6.41% and 2.29%, respectively. The highest PEC is equal to 1.66 and belongs to the Reynolds number of 750 using four semi-twisted tape inserts with 3% nanoparticles. This work offers instructions to model an advanced design of twisted tape integrated with tubes using multiple semi-twisted tapes, which helps to provide a higher amount of energy demand for solar applications. Full article
(This article belongs to the Special Issue Applications of Nanofluids – II)
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