Natural Convection Enhancement in the Annuli Between Two Homocentric Cylinders by Using Ethylene Glycol / Water Based Titania Nanofluid

Authors

  • Fateh Mebarek-Oudina Department of Physics, Faculty of Sciences, University 20 août 1955 - Skikda, B.P 26 Route El-Hadaiek, Skikda 21000, Algeria
  • Ahmed Kadhim Hussein College of Engineering -Mechanical Engineering Department, University of Babylon, Babylon City, Hilla, Iraq
  • Obai Younis Department of Mechanical Engineering, College of Engineering at Wadi Addwaser, Prince Sattam Bin Abdulaziz University, Wadi Addwaser, Saudi Arabia
  • Sara Rostami Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam
  • Rasoul Nikbakhti School of Engineering, College of Science and Engineering, University of Tasmania, Tasmania, Australia

DOI:

https://doi.org/10.37934/arfmts.80.2.5673

Keywords:

Natural convection, coaxial cylinders, annular region, numerical modelling, nanofluid, ethylene glycol / water mixture

Abstract

The natural convection heat tranfer in annulate region confined  between two homocentric cylinders were numerically studied in the present work. The annulus was filled by ethylene glycol / water based Titania nanofluid. Both internal and external cylinders are presereved at an isothermal hot and cold temperatures respectively, whereas, the upper and lower walls are adiabatic. The numerical solution is obtained by applying the finite volume method along with the SIMPLER, and TDMA algorithms. In the current study, the solid volumetric fraction is varied as (0 % ? ? ? 3 %),  the volume ratios of  EG to water  are varied as (0:100 %, 40 : 60 %, 100:0 %), while both the Rayleigh number and  radii ratio are considered fixed at  (Ra = 104  and  ? = 2). The obtained results indicated that, the average Nusselt number  increases as the solid volumetric fraction and the volume ratio of  ethylene glycol in the base fluid increase. Moreover, the velocity profiles reach their maximum value in the half region adjacent the internal hot wall when TiO2 – water  nanofluid is used. Also, the temperature profiles decrease along the radial distance for all considered values of  volume ratios of  EG to water.

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2021-02-15

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Mebarek-Oudina, F. ., Hussein, A. K. ., Obai Younis, Rostami, S. ., & Nikbakhti, R. . (2021). Natural Convection Enhancement in the Annuli Between Two Homocentric Cylinders by Using Ethylene Glycol / Water Based Titania Nanofluid. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 80(2), 56–73. https://doi.org/10.37934/arfmts.80.2.5673

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