Investigation of the effects of slip velocity and temperature jump on the internal flow at microchannel

Microchannel is a small and efficient heat exchanger which, by combining some features such as high heat transfer coefficient, low fluid volume required and small weight and dimensions, is a very efficient tool in the field of heat transfer purposes. In this article, the slip velocity and temperature jump on the internal flow of the microchannel are investigated. The results show that in each Reynolds number, the slip velocity increases the velocity near the wall, while decreasing the maximum velocity in the center line. The velocity distribution in the microchannel (slip velocity) becomes wider compared to the quantum flow. The velocity in the center line (maximum velocity) decreases with each Reynolds number as the sliding velocity increases. The maximum velocity during the developed flow decreases by about 25% as the Knudsen number increases to 0.1, but this effect is greater on higher Reynolds numbers. In Knudsen numbers and different temperature jumps, increasing slip velocity and temperature jump has a decreasing effect on the temperature at each section. Curved microchannel acts as a direct microchannel. Increasing the nanofluid volume fraction Increases the local Knudsen number at slip-flow and non-slipflow regime.