贯穿流体膜厚度无压力梯度。
There is no pressure gradient through the thickness of the film.
随着筛孔直径的减小，压力梯度大大增加。
It will increase sharply with the decrease of the diameter of sieve pore.
本文提出了利用平均径向速度分析压力梯度的方法。
The method to analyze the pressure gradient with mean radial velocity is used.
而横向压力梯度的减弱将有利于减少横向流动损失。
Moreover, the abatement of a transverse pressure gradient will be beneficial for decreasing transverse flow losses.
方程中考虑了压力梯度及非匀速运动引起的附加质量力。
The pressure gradient and the additional body force due to unsteady motion have been considered in the equations.
弯曲微通道有助于增加分离通道的长度和减小外界压力梯度的干扰。
MicroChannel turns contribute to extending the separation length and reducing the disturbance of external pressure gradient.
随着波长的增大或介质黏度的减小，声波的衰减减缓，压力梯度越小。
The attenuation of the sound waves leads to a negative exponent pressure gradient.
研究者发现，“成功的瓣膜植入可明显降低经主动脉瓣口的压力梯度。”
"Successful device implantation resulted in a marked reduction of aortic transvalvular gradients, " the investigators found.
给出了考虑注采比和启动压力梯度的平均地层压力和边界压力的确定方法。
The method is presented to determine formation average pressure and boundary pressure with threshold pressure gradient and injection-production ratio.
考虑启动压力梯度和介质变形的影响，研究低渗透油藏中直井产量的变化规律。
With consideration of start up pressure gradient and media deformation, this paper studies vertical well production in low permeable reservoirs.
计算结果表明，这种新方法不但能估计压力梯度，而且还能给出浆体速度分布。
The computed result shows that this new method can not only predict the pressure gradient but can also give the velocity profile.
水力机械的分离为三维流动，三维流动的侧向压力梯度产生边界层的二次流动。
The separation flow is three dimensional in hydraulic machine. The pressure gradient in cross direction produces secondary flow in boundary layer.
本文着重介绍水平管中这种两相流动的流动型态、压力梯度和持液率的预测方法。
This article mainly introduces the prediction method of the flow pattern, pressure gradient and liquid holdup of two phase flow in horizontal pipelines.
如果考虑压力梯度的影响，还可以将该方法推广到轴对称和三维湍流边界层中去。
The method can be extended to axisymmetric and three-dimensional turbulent boundary layers if the pressure gradient effect is considered.
因此，在进行低渗透油藏垂直裂缝井产能分析时，必须考虑启动压力梯度的影响。
Therefore, the impact of starting pressure gradient must be considered when analyzing the productivity of vertical fracture well in low permeability reservoir.
异常高压气藏作为一种特殊气藏，几乎遍布于世界各地，其压力梯度可以高达0。
Overpressured gas reservoir being a kind of special gas reservoir, can be found all over the world, whose pressure gradient is greater than 0.
实验表明，低渗透油藏具有启动压力梯度，因此其渗流规律与中、高渗透油藏不同。
Experiments show that a low permeable reservoir has a starting pressure gradient, and therefore different seepage rule from that of middle and high permeable reservoirs.
与水驱相比，微生物驱油可降低启动压力梯度，降低渗流阻力，扩大有效驱动距离。
The experiments show that microbe solution flooding can decrease the threshold pressure gradient, lessen the flow resistance, and extend the effective drainage distance.
作者认为，层控矿床成矿作用中，温度梯度和压力梯度的存在，是一个重要的因素。
It is thought that the existence of temperature -gradient and pressure-gradient is an important factor in the formation of stratabound ore deposits.
为了研究低渗透砂岩的启动压力梯度，设计了一种非稳态渗流中测量压力的试验方法。
The threshold pressure gradient of low permeability sandstone was studied experimentally by measuring the pressure attenuation in an unsteady seepage flow.
同时还对7种压力梯度下沟槽表面流场进行模拟，研究了压力梯度对减阻效果的影响。
In addition, numerical simulations of turbulent flow over riblet surface are carried out in 7 kinds of pressure gradients. The effect of pressure gradient is analyzed.
还研究了压力梯度对临界雷诺数的影响，探讨了不同压力场对流动稳定性作用的规律性。
The effect of the pressure gradient on critical Reynolds number is also displayed and the influence rule of the different pressure fields on the flow stability is exploited.
结果表明：压力恢复稳态测压法求解启动压力梯度理论正确，方法简单，具有明显的优点。
The results indicate that using pressure build-up steady state pressure survey approach to calculate starting pressure gradient has obvious advantages with simple method and is theoretically correct.
该式不仅含速度矢量与温度梯度矢量的点积项，还含有速度矢量与压力梯度矢量的点积项。
This expression not only contains the term of dot product of velocity vector and temperature gradient, but also contains the dot product of velocity vector and the pressure gradient.
低渗透储层渗流具有非达西特征和启动压力梯度，是研究低渗透储层开发过程中问题的基础。
Research on characters of non-Darcy flow and starting pressure gradient of low permeability reservoir were foundation of reservoir production.
结果表明影响低渗气藏的主要因素有应力作用、启动压力梯度、渗透率、滑脱效应、水锁效应等。
It is indicated that the main factors affecting low permeability gas reservoir are stress action, start-up pressure gradient, permeability, slippage effect, and water blocking effect etc.
测试流体粘度的一种仪器，在实验中使流体在已知压力梯度或流速情况下流过已知直径的一段试管。
An instrument for measuring the viscosity of a fluid by passing the fluid at a known pressure gradient or velocity through a length of tubing of known diameter.
测试流体粘度的一种仪器，在实验中使流体在已知压力梯度或流速情况下流过已知直径的一段试管。
An instrument for measuring the viscosity of a fluid by passing the fluid at a known pressure gradient or velocity through a length of tubing of known diameter.
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