Flow and heat transfer in a microchannel in an acceleration environment

The heat dissipation performance of avionics is affected in an acceleration environment if the avionics utilize liquid as heat dissipation work media. In an acceleration environment, flow and heat transfer characteristics of ethylene glycol solution of 30% (volume concentration) in a rectangular microchannel are investigated by Finite volume method (FVM). The effect of magnitude and direction of acceleration on flow and heat transfer in the microchannel is studied. The effect of microchannel structure and work liquid flux on flow and heat transfer with acceleration is considered. It shows that compared with stable condition without acceleration, heat transfer in the microchannel dramatically declines whereas flow resistance coefficient rapidly rises during very short period of beginning.