ABSTRACT
Due to the fact that the size of gap height h is much smaller than the valve core radius r0, the circular micro gap flow can be simplified to an
1 INTRODUCTION
On the macro scale, the effect of the wall slip[1-3] on internal leakage is insignificant. Sealing gaps exist in the micro/nano level and the wall slip is bound to lead to obvious changes in the leakage[4,5] amount and the flow field[6] characteristics, while existing research is mainly concentrated on the bearing capacity of friction and oil film force of the impact.
