eprintid: 12976
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/29/76
datestamp: 2023-11-10 03:27:32
lastmod: 2023-11-10 03:27:32
status_changed: 2023-11-10 01:50:01
type: article
metadata_visibility: show
creators_name: Ilyas, S.U.
creators_name: Narahari, M.
creators_name: Pendyala, R.
title: Rheological characteristics of ultrastable diamond-thermal oil nanofluids
ispublished: pub
keywords: Diamonds; Heat transfer; Nanoparticles; Non Newtonian flow; Petroleum refining; Shear flow; Shear thinning, Diamond nano-particles; Multi-variable correlations; Nanoparticle loadings; Rheological behaviors; Rheological characteristics; Shear-thinning behavior; Surface characterization; Varying temperature, Nanofluidics
note: cited By 14
abstract: Diamond nanoparticles possess numerous industrial applications, especially in the areas of heat transfer, catalysis, advanced materials, medical, electronics, and sensors. The rheological behavior of diamond-based nanosuspensions is experimentally investigated. The dispersions of diamond nanoparticles in highly refined thermal oil (THO) with 70�99 wt hydrocarbons (C15-C50) are prepared at varying particle loadings using two-step technique. Different surface characterizations are performed for the nanoparticles. The investigation is carried out for considerably high diamond nanoparticle loadings in THO, i.e., 0.1 wt to 1 wt. A combination of ultrasonication and stabilizer-addition method is applied to obtain ultrastability (four months) for factual applications of nanofluids. The viscosity of diamond-THO nanofluids is measured at varying temperatures and shear rates in the range of 298-338 K and 500�2000s�1, respectively. The obtained results affirm the non-Newtonian and shear thinning character of diamond-THO nanofluids. The shear-thinning behavior is quantified using Ostwald-de-Waele relationship. A maximum increase of 21 in the viscosity is found for 1 wt diamond nanosuspension at 298 K. The experimental data of viscosities is compared with the VFT (Vogel-Fulcher-Tammann) eq. A generalized multivariable correlation for the viscosity of diamond-THO nanofluid is presented as a function of temperature and nanoparticle loading. © 2018 Elsevier B.V.
date: 2020
publisher: Elsevier B.V.
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85083381418&doi=10.1016%2fj.molliq.2020.113098&partnerID=40&md5=92cf21190f76afe9fa3c65f313e08121
id_number: 10.1016/j.molliq.2020.113098
full_text_status: none
publication: Journal of Molecular Liquids
volume: 309
refereed: TRUE
issn: 01677322
citation:   Ilyas, S.U. and Narahari, M. and Pendyala, R.  (2020) Rheological characteristics of ultrastable diamond-thermal oil nanofluids.  Journal of Molecular Liquids, 309.   ISSN 01677322