Combined Convection of CuO-H2O Nanofluid in Arc-Shape Annuli with Moving Flat Top Wall


Sadoon K. Ayed†, Wajeeh Kamal Hasan‡, Lina Jassim‡†, Laith Jaafer Habeeb‡‡


†Department of Mechanical Engineering, University of Technology, Iraq, Baghdad,

‡Refrigeration and Air Conditioning Engineering Department, Al-Rafidain University Collage, Bagdad, Iraq,

‡†Mechanical Engineering Department, Mustansiriyah University, Baghdad, Iraq

‡‡Training and Workshop Center, University of Technology, Bagdad, Iraq.

Corresponding Author Email: 20021@uotechnology.edu.iq, dr.linajassim@uomustansiriyah.edu.iq,20028@uotechnology.edu.iq, dr.wajeeh21@gmail.com 

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Combined convection of CuO-H2O nanofluid in a lid-driven arc-shape annulus with moving flat top wall has been numerically investigated. The arc-shape outer wall of annulus is maintained at a constant hot temperature Th. While, the flat top wall is maintained at a constant cold temperature at Tc. The inner cylinder is adiabatically insulated. The governing equations of continuity, momentum, and energy are solved numerically using Fluent 6.3 commercial program. The ranges of Richardson number and nanoparticles volume fraction are 0.1≤ 𝑅𝑖 ≤, 10 and 0 ≤ 𝜑 ≤ 0.15; respectively. The influences of Richardson number (Ri) and nanoparticles volume fraction (𝜑) on the behaviors of streamlines, isotherms, local and average Nusselt number, and skin friction factor have been minutely discussed.