Experimental investigation of heat transfer of plate surface with novel eye shaped dimples

Heat transfer, pressure drop, and turbulent flow characteristics across surfaces having arrays of shallow dimples of various forms have all been investigated experimentally. Three distinct dimples shapes circular, ellipse, and novel eye-shaped dimple plates as well as flat plates without dimples with 0.4 m/s to 1.4 m/s velocity are examined. Heat transfer was measured using Data collecting system. To determine the total improvement in heat transfer and the pressure drop of the turbulent flow over the dimpled surfaces, steady-state experiments were conducted. When compared to dimple plates that are circular and elliptical in form, the result findings showed that the novel eye-shaped dimple plate significantly improves heat transmission with a slight increase in pressure loss. Eye-shaped dimples offered the greatest improvement in thermal performance with heat transfer rates increased by about 10% and 8% when compared to elliptical and circular dimples respectively. Stronger shear-layer interactions, wider recirculation zones, and more turbulence were credited with this improvement.