{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,9]],"date-time":"2026-06-09T16:14:18Z","timestamp":1781021658135,"version":"3.54.1"},"reference-count":65,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2021,7,29]],"date-time":"2021-07-29T00:00:00Z","timestamp":1627516800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Entropy"],"abstract":"<jats:p>The dynamic viscosity and rheological properties of two different non-aqueous graphene nano-plates-based nanofluids are experimentally investigated in this paper, focusing on the effects of solid volume fraction and shear rate. For each nanofluid, four solid volume fractions have been considered ranging from 0.1% to 1%. The rheological characterization of the suspensions was performed at 20 \u2218C, with shear rates ranging from 10\u22121s\u22121 to 103s\u22121, using a cone-plate rheometer. The Carreau\u2013Yasuda model has been successfully applied to fit most of the rheological measurements. Although it is very common to observe an increase of the viscosity with the solid volume fraction, we still found here that the addition of nanoparticles produces lubrication effects in some cases. Such a result could be very helpful in the domain of heat extraction applications. The dependence of dynamic viscosity with graphene volume fraction was analyzed using the model of Vallejo et al.<\/jats:p>","DOI":"10.3390\/e23080979","type":"journal-article","created":{"date-parts":[[2021,7,29]],"date-time":"2021-07-29T21:21:21Z","timestamp":1627593681000},"page":"979","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":37,"title":["Viscosity and Rheological Properties of Graphene Nanopowders Nanofluids"],"prefix":"10.3390","volume":"23","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1745-5995","authenticated-orcid":false,"given":"Abderrahim","family":"Bakak","sequence":"first","affiliation":[{"name":"Laboratoire Interdisciplinaire de Recherche en Bioressources, \u00c9nergie et Mat\u00e9riaux (LIRBEM), ENS, Cadi Ayyad University, Marrakech 40000, Morocco"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7088-6001","authenticated-orcid":false,"given":"Mohamed","family":"Lotfi","sequence":"additional","affiliation":[{"name":"Materials, Energy & Environment Laboratory (LaMEE), FSSM, Cadi Ayyad University, Marrakech 40000, Morocco"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2783-135X","authenticated-orcid":false,"given":"Rodolphe","family":"Heyd","sequence":"additional","affiliation":[{"name":"Laboratoire Angevin de M\u00e9canique, Proc\u00e9d\u00e9s et innovAtion (LAMPA), Arts et M\u00e9tiers ParisTech, Boulevard du Ronceray 2, BP 93525, CEDEX 01, F-49035 Angers, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Amine","family":"Ammar","sequence":"additional","affiliation":[{"name":"Laboratoire Angevin de M\u00e9canique, Proc\u00e9d\u00e9s et innovAtion (LAMPA), Arts et M\u00e9tiers ParisTech, Boulevard du Ronceray 2, BP 93525, CEDEX 01, F-49035 Angers, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Abdelaziz","family":"Koumina","sequence":"additional","affiliation":[{"name":"Laboratoire Interdisciplinaire de Recherche en Bioressources, \u00c9nergie et Mat\u00e9riaux (LIRBEM), ENS, Cadi Ayyad University, Marrakech 40000, Morocco"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,7,29]]},"reference":[{"key":"ref_1","unstructured":"(2019). 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