Author/Authors :
Ayed, Sadoon K. Department of Mechanical Engineering - University of Technology, Iraq, Baghdad , Hasan, Wajeeh Kamal Refrigeration and Air Conditioning Engineering Department - Al-Rafidain University Collage, Bagdad, Iraq , Jassim, Lina Mechanical Engineering Department - Mustansiriyah University, Baghdad, Iraq , Habeeb, Laith Jaafer Training and Workshop Center - University of Technology, Bagdad, Iraq
Abstract :
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.
Keywords :
combined convection , arc-shape annulus , lid-driven , nanofluid
