粘滞阻力

BR自粘性差的决定性因素是粘滞阻力低，扩散能力只是其必要条件。

The poor tackiness of BR was determined by its low viscous resistance , and the high molecular diffusion was only one of the necessary conditions to obtain good tackiness .

结果表明，极性流体在储层孔隙中的电动-水力渗流特性除了与其粘滞阻力、压力、重力等因素有关外，还与自然电场等因素有关，且外加电场可改变流体的渗流特性。

The result reveals that the electrohydraulic seepage behavior is also related to natural electric field except the viscous resistance , pressure and gravity .

单摆法测重力加速度是物理学中一个传统的实验，方法简单易操作，且容易测得较精确的g值（在不考虑空气浮力、空气的粘滞阻力、lr及θ角较小的情况下）。

Modify expressions of single-pendulum method measure gravity acceleration is one tradition experiment of physics , method simple and operation even measure to obtain accurate " g " .

通过对纤维截面形貌的扫描电镜分析，发现表面张力对三叶形PCS纤维异形截面的形成有着较大的影响，它和粘滞阻力相互竞争的共同作用决定了三叶形PCS纤维异形度的大小。

Through research by SEM , we discovered that the surface tension influences greatly on the formation of the profile-degree of trilobal section PCS fiber , the competitive action between it and the agglutination resistance decides the size of the profile-degree of trilobal section PCS fiber .

受到周围液体的粘滞阻力而平衡。

Experience viscous drag force from the surrounding liquids .

气垫导轨测重力加速度时空气粘滞阻力的影响

The influence of air friction drag upon the measurement of gravity acceleration measurement on air-cushioned guide way

其机制是，较高的基液黏度可提供较大的粘滞阻力，但易引起颗粒的团聚。

The mechanism is the silicone oil with larger viscosity provides larger viscous force , but makes the nanoparticles easier to agglomerate .

对压渗法浸渗过程动力学进行理论分析后，计算出毛细管力、粘滞阻力。

After the analyze of infiltration dynamics in theory , the numerical value of capillarity pressure and viscidity resistance can be calculated .

本文介绍了用粘滞阻力修正法和粘滞阴力互相抵消法来精确地测量重力加速度。

Methods for accurate gravitational acceleration measurement are presented , which are viscous force modified method and viscous force offset each other method .

本文根据杆式抽油系统动力学模型，在建立了适合于多级抽油杆柱的一维粘滞阻力波动方程的基础上，给出了一种计算抽油杆柱任意位置处位移的差分格式。

This paper presents the difference equation for calculating displacement of rod string at any position , which is based on the dynamic model of sucker-rod pumping systems .

在气垫导轨上测重力加速度时，受空气粘滞阻力的影响，测量结果并不理想。

While measuring the acceleration of gravity on the air cushion slide way , we can ? t receive an ideal and satisfying result because of the air resistance .

在流量不变的条件下，通过假定粘滞阻力与流速成正比，导出水流的运动学方程；

Under the steady discharge , by assuming the resistance of viscosity is directly proportional to the velocity of flow , the dynamic equation of rill flow is deduced .

在假设胶囊行进速度为常数时，粘滞阻力和其直径与长度乘积呈线性关系，但数值较小。

Viscous resistance is also found to have linear relationship to the endoscope 's diameter and length when assuming capsule 's creeping velocity constant , although the ratio is very small .

计算实例表明，抽油杆柱与油管的摩擦力是杆柱自重的5.01%；所受液体粘滞阻力相当于稠油竖直井的阻力。

A case history shows that the above-mentioned friction force is 5.01 percent of the rod string weight and the fluid resistance encountered is commensurate with the resistance in vertical thick oil wells .

从斜直井的特点出发，推导出装有扶正器的抽油杆柱所受液体粘滞阻力及与油管摩擦力的计算公式。

In view of the characteristics of slant straight holes , this article works out the formulas for calculating the fluid resistance on a rod string with centralizers and the friction force between rod string and tubing string .

即考虑到在三维空间中井下粘滞阻力及动载的影响，利用微单元分析方法计算出轴向载荷与轴向应力，然后在此基础上进行杆柱组合设计，并给出了设计流程。

Taking into account the 3D well deviation effect as well as downhole viscosity resistance and dynamic load effect of actual wellbore , a new API sucker-rod string design method is recommended in the paper and its software has been programmed .

当成岩作用进入中&晚期以后，泥质岩层启动阻力增大，流体难以流动或不能流动，粘滞阻力近似等于零，超压值等于启动阻力值。

In the middle to later period of diagenesis , the starting resistance of mudstone layer increased , and the fluid was hard or impossible to flow in the pores . The viscous resistance is equal to zero , and the ultra-pressure value is equal to the starting resistance .