Based on the major mechanisms governing particle movement in turbulent boundary layer and the definition of particle deposition velocity,the governing differentiate equation in particle concentration boundary layer and its analytical solution were deduced,and an analytical expression of dimensionless deposition velocity was achieved.
在分析颗粒在紊流边界层中运动机理的基础上,根据沉降速度的定义,推导出了浓度边界层微分方程及其解析解,进而得到了颗粒无量纲沉降速度的解析表达式。
Presents the calculation methods of particle deposition velocity,deposition quantity and penetration rate in smooth ventilation ducts.
给出了光滑通风管道内颗粒沉降速度、沉降量和穿透率的计算方法,对光滑风道内颗粒的沉降规律、风道的过滤作用、风道所需的清洗周期进行了模拟分析。
The deposition velocity of the different sections duct was determined under the different air speeds and the different particle sizes to the straight horizontal sections and the bend sections of the rectangular ductwork(material is zinc-plated steel),and the relationship between them was analyzed.
用滑石粉来模拟气溶胶粒子,对矩形风管系统(材料为镀锌钢板)的直管段和弯管段在不同的风速和粒径下,测定了不同风管表面的沉降速度,分析了它们之间的关系。
Influence of clay content on sedimentation rate in silt-sandy beach;
粘土含量对粉沙质泥沙沉降速度的影响
It obtained the values of the fractal dimension and sedimentation rate of flocs in different flocculation conditions and analyzed the relavant variation trends and the causes.
在混凝絮凝体的分形与沉降特性实验研究中,通过自行设计的絮凝体混凝、沉降、观测功能的一体装置,求出了在不同混凝工况下所形成混凝絮凝体的分形维数和沉降速度,并分析了相应的变化趋势和原因。
Methods: According to the sedimentation rate, controlling process was chosen for different doses of medicine.
方法 :根据颗粒沉降速度的计算结果对不同剂型药物的生产工艺进行控制。
The traditional smoke theory considers that the smoke particles will sedimentate due to gravity after forming of smoke screen, and then the particles reach a final sedimentation velocity thanks to the effect of air-resistance and buoyancy, and the equation can be solved by the Stokes pellet resistance theory and often used to analyze the performance of smoke.
传统烟幕理论认为,在烟幕形成后,烟幕微粒受到重力的作用开始沉降,同时受到空气阻力和浮力的作用,最后使烟幕微粒达到终端沉降速度,这个速度方程可以通过Stokes圆球阻力理论求得,并被用来分析烟幕的性能。
And the conclusion can be drawn that it can reduce sedimentation velocity by using plating hollow particles or thin plate-shaped sample.
通过研究我们发现,采用镀金属的空心颗粒或薄板形试样,能够明显降低沉降速度。
The mathematical model of the sedimentation velocity of particles was established.
然后建立了颗粒物沉降速度的数学模型,选取了具体的模型并进行计算,通过比较分析颗粒沉降速度的数据,对通风管道影响尘粒沉积的诸因素,如尘粒粒径、送风风速和管壁粗糙度等进行了探讨研究发现:(i)在风速不变的情况下,随颗粒粒径的增加,沉降速率总体趋势上是相应增加的;但在亚微米级粒径颗粒的附近,因为在近壁面处受布朗扩散力作用和重力沉降作用的变化,沉降速度存在一个极小值;(ii)对于粒径大于1μm的粒子,尘粒的沉降速度与风速呈线性递增的关系,但对于粒径小于1μm的尘粒沉降而言,在风速达到5m/s以前,其沉降速度增大的比较快,当风速达到5m/s后,沉降速度又趋于平缓;(iii)壁面粗糙度越大,沉降速度越大;反之越小。
sedimentation rate [ test ]
(血液等的)沉降速度[检查]
Engineering Calculation of Critical Velocity and Settling Velocity of Granular Materials
颗粒物料临界速度和沉降速度的工程计算
Study on the Free Dropping Velocity of Fiber-Particle;
纤维性粉尘自由沉降速度问题的研究
Settling velocity at Xuliujing in Changjiang Esturay
长江口徐六泾洪季泥沙沉降速度研究
EHYTHROCYTE SEDIMENTION RATE Ⅳ──PRINCIPLE AND METHOD FOR MEASURING ERYTHROCYTE SEDIMENTATION VELOCITY
红细胞沉降率IV──红细胞沉降速度测量的原理和方法
Experimental Study on Deposition Velocity of Particles in Rectangular Ventilation Ducts;
矩形风管系统中颗粒物沉降速度的实验研究
The Prediction of Dust Deposition in Rectangular HVAC Ducts;
矩形通风空调管道内尘粒沉降速度的预测
Research on Settlement Speed and Stabilization of High Earth Fill Sub-grade;
高填方路基的沉降速度分析与稳定性研究
The setting velocity of a particle directly characterizes its reaction too flow.
单颗泥沙沉降速度直接表现出它对水流的反作用。
Application Research of Data Mining Technique in the Noneball Particle s Sinking Speed;
数据挖掘技术在非球形颗粒沉降速度中的应用研究
The expansion ratio is related to the liquid flow rate, fluidization velocity and free descending velocity of the packing material.
填料膨胀率的大小与液体流量、填料的流化速度及自由沉降速度有关。
They sediment toward the bottom of the centrifuge tube at a velocity.
它们以某一速度向管底方向沉降。
Study on the Deposit Velocity of Settling Slurry in Horizontal Pipeline;
沉降性浆体水平管道堆积速度的研究
Study of Velocity and Volumetric Coupling and Critical Velocities in Slurry Pipeline;
沉降性浆体速度与浓度分布耦合模型及迁移速度研究
The deposition rate of Al film decreases with the increase of the substrate temperature.
随着基片温度的增加,薄膜的沉积速率反而降低。
However the distributing of velocity and temperature is not uniform in the mid fluid,So it is not helpful for sedimentation of matte drops.
主流区流体流速及温度场分布不均匀,不利于硫颗粒沉降。
The deposition rate and photosensitivity increases while the Xc decreases with the increase of silane concentration.
随着硅烷浓度的增加,沉积速率和光敏性增加而晶化率下降。
Investigation on the Embankment Height & Width Problem Due to the Settlement of Soft Soil Ground;
高速公路软基沉降引起路堤标高及宽度问题的研究
