• 文献标题:   Backward-facing step heat transfer of the turbulent regime for functionalized graphene nanoplatelets based water-ethylene glycol nanofluids
  • 文献类型:   Article
  • 作  者:   AMIRI A, ARZANI HK, KAZI SN, CHEW BT, BADARUDIN A
  • 作者关键词:   backwardfacing step, heat transfer, turbulent, ethylene glycol, functionalization, graphene nanoplatelet
  • 出版物名称:   INTERNATIONAL JOURNAL OF HEAT MASS TRANSFER
  • ISSN:   0017-9310 EI 1879-2189
  • 通讯作者地址:   Ferdowsi Univ Mashhad
  • 被引频次:   13
  • DOI:   10.1016/j.ijheatmasstransfer.2016.02.042
  • 出版年:   2016

▎ 摘  要

Herein, an experimental study on thermo-physical properties of ethylene glycol-functionalized graphene nanoplatelets/water-ethylene glycol nanofluids (EGGNP-WEG) and a numerical study on the convective heat transfer over a backward-facing step are performed. Accordingly, EGGNP was first synthesized covalently to achieve a stable colloidal solution in water-ethylene glycol mixture. Some characterizations were applied to analyze the surface functionality and morphology of EGGNP-flakes. To study the convective heat transfer coefficient in turbulent regime, a numerical study is performed at different weight fractions of EGGNP. According to the results, a higher weight concentration of EGGNP in basefluid indicates a greater extent of convective heat transfer coefficient and thermal conductivity, implying higher heat transfer rate over a backward-facing step. (C) 2016 Elsevier Ltd. All rights reserved.