Numerical study of rotation effects on microchannel flowand heat-Transfer performance

The use of microchannels is one of the most promising and investigated routes for removing the high heat concentra- tions generated by avionic electronic circuits. Modern aircraft with high maneuverability are always subject to severe acceleration, so various dynamic characteristics of the coolant greatly affect the flow and heat-Transfer performance in microchannels. To evaluate these influences, microchannels with various aspect ratios have been modeled numerically under conditions of acceleration. The three-dimensional governing equations for mass, momentum, and energy have been solved using an implicit finite-volume scheme. The results show that the flow and heat-Transfer performance in microchannels is affected by the flow state, force state, and channel geometry parameters. These make heat-Transfer characteristics in microchannels a complicated issue in an acceleration environment.