A NEW MODIFIED REYNOLDS-EQUATION FOR ULTRATHIN-FILM GAS LUBRICATION

A new modified Reynolds equation for solving the ultrathing film gas l ubrication is proposed to overcome the complicated and time-consuming difficulties of solving the linearized Boltzmann equation, The model e quation is based on modified high-order slip-how velocity distribution with three adjustable coefficients, which are corrected according to the Boltzmann model, The results are compared to those obtained using other kinds of currently employed modified Reynolds equations, It show s that the present model produces a closer approximation to that of th e exact Boltzmann model than do other models, in a wider range of inve rse Knudsen number, In addition, the newly derived equation is widely applicable to practical use.