初始取向 meaning in English

initial orientation

The settling behaviors of the rectangular particle were affected significantly by the initial orientation angle and length - width ratio
粒子的初始取向角和长宽比对其沉降过程有较大影响。
The settling behaviors of a rectangular particle with different initial orientation angles and length - width ratios were simulated by using distributed lagrange multiplier / fictitious domain method
摘要为了对方形粒子在二维垂直通道中的沉降运动特性进行研究，应用了拉格朗日乘子虚拟区域方法对不同初始取向角、不同长宽比情况下方形粒子的沉降运动进行了直接数值模拟。
With the increasing initial orientation angle and length - width ratio , the drifting distance , the fluctuation of the orientation angle , lateral drifting velocity and rotation velocity all increase , while the final settling velocity decreases with the increasing length - width ratio
初始取向角和长宽比增大，则粒子的横向漂移以及取向角、侧向漂移速度和转动角速度的振荡幅度都增大；同时随着长宽比的增大，粒子的沉降速度相应减小。