A three-dimensional numerical simulation is conducted to investigate the effect of geometrical parameters
on laminar water flow and forced convection heat transfer characteristics in grooved microchannel heat
sink (GMCHS). Four geometry variables which are; the depth, tip length, pitch and orientation of the
cavities are taken into account in order to optimize the aluminum heat sink design. These geometric parameters
could change the cavity shape from triangular to trapezoidal and then to rectangular shape. The
governing and energy equations are solved using the finite volume method (FVM). The performance of
GMCHS is evaluated in terms of Nusselt number ratio, thermal/hydraulic performance (JF) and isotherm
and streamlines contours. The results showed that the trapezoidal groove with groove tip length ratio of
δ = 0.5, groove depth ratio β = 0.4, groove pitch ratio of ψ = 3.334, grooves orientation ratio of ζ= 0.00 and
Re = 100 is the optimum thermal design for GMCHS with Nusselt number enhancement of 51.59% and
friction factor improvement of 2.35%.
تاريخ النشر
04/01/2015
الناشر
International Communications in Heat and Mass Transfer
حمدي عمادالدين أحمد حمدي | Hamdi Emaduldeen Ahmed Hamdi | 5157