The effect of wall roughness on gas-particle flows in a horizontal backward-facing step is studied using a phase-Doppler particle anemometer (PDPA) by measuring the mean and RMS particle velocities.
用相位多普勒颗粒测速仪（PDPA）测量了颗粒的平均与脉动速度，研究了壁面粗糙度对水平后台阶气粒两相流动的影响。
With the increase of the implantation voltage, the root-mean-square roughness (RMS) of Zr films almost don't change.
随着注入高压的增加，薄膜的表面粗糙度均方根（RMS）值的变化不大。
With the increase of the implantation voltage, the root-mean-square roughness (RMS) of Zr films almost don't change.
随着注入高压的增加，薄膜的表面粗糙度均方根（RMS）值的变化不大。
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