Numerical Investigation of Microchannel Heat Sink with Trefoil Shape Ribs

The present study investigates the thermo-hydraulic characteristics of a microchannel sink with novel trefoil Shaped ribs. motivation for this form rib shape is taken from design lung alveoli that exchange oxygen and carbon dioxide. This has been conducted numerically by using code commercially available Fluent software. shaped ribs were mounted on centerline different walls in three configurations. These consisted base wall (MC-BWTR), sidewall (MC-SWTR), all (MC-AWTR) smooth channel (MC-SC) having no its wall. streamline distance between was kept constant at 0.4 mm, results compared pressure drop (∆p), Nusselt number (Nu), thermal resistance (Rth) enhancement factor (η). indicated addition to any improved heat transfer expense an increase friction factor. trends coefficient same, which higher values MC-AWTR followed MC-SWTR lower value MC-BWTR. In order compare hydraulic performance configurations simultaneously, overall quantified terms factor, than one each case, except MC-AWTR, 100 < Re 200 regimes. ribbed highest MC-BWTR, it lowest MC-AWTR. Moreover, increases Reynolds (Re) case. confirms increment velocity more significant drop. 1.6 attained = 1000, 0.87 achieved 100.