Management of conjugate heat transfer using various arrangements of cylindrical vortex generators in micro-channels

Placing cylindrical vortex generators (VGs) at the base of a uniform micro-channel heat sink (MCHS) enhances transfer, but incurs substantial pressure drop. The effect different VG parameters, including position (front, middle or back), radius (R) in range (100–300) μm and distance (D) between them (0–500) are considered to enhance conjugate transfer. Laminar flow flux conditions relevant microelectronics water cooling systems (100 W/cm2) used. numerical approach, using COMSOL Multiphysics® software, is validated found be good agreement against benchmark experimental studies. It generally that VGs transfer drop increases. lowest thermal resistance achieved when placing front MCHS with no R = 300 μm, this also results highest penalty. Results show it not necessarily best enhancement leads thermal-hydraulic performance (PEC) index. PEC index position, 100, D 0 Re > 250.