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浆液流体的黏滞性与流速的关系
添加时间:2019.11.08

浆液流体的黏滞性与流速的关系

流体内部质点间或流层间因相对运动面产生内摩擦力(内力)以反抗相对运动的性质,称为黏滞性。此内摩擦力称为黏力。表示流体滞性程度大小的量,是动力黏性系数u和运动黏性系数v
1.动力黏性系数u
    表征流体内摩擦力与流体性质有关的系数,称动力黏性系数或称动力黏度,简称黏度。它与流体的种类有关。μ值愈大,表示流体的黏滞性(黏度)愈大。同类流体的μ值随温变的变化而变化,随着液体的温度升高μ值降低。
    μ的单位泊(P)1=10-1Pa·s

2.运动黏性系数v

流体动力黏性系效μ与密度p的比值v称流体运动黏性系数或称运动黏度,工程计算中常用到运动黏性系数。

V=μ/p

v的单位斯托克斯(St)或称斯。1St=1cm2/s
1-1、表1-2中表示了水在不同温度下的运动就性系数v的值。 渣浆泵

Relationship between viscosity and velocity of slurry fluid




The internal friction (internal force) between particles or flow layers in a fluid due to the relative motion surface to resist the relative motion is called viscosity. This internal friction is called viscous force. The quantity indicating the degree of fluid viscosity is the dynamic viscosity coefficient u and the kinematic viscosity coefficient v.


1。 Dynamic viscosity coefficient u


安徽快3开奖结果The coefficient that characterizes the internal friction of fluid and its properties is called dynamic viscosity coefficient or dynamic viscosity。 It is related to the type of fluid。 The higher the μ value, the greater the viscosity of the fluid。 The μ value of the same kind of fluid changes with the change of temperature, and decreases with the increase of temperature。


μ unit poise (P), 1 poise = 10-1pa · s.




2. Kinematic viscosity coefficient V




The ratio of the viscosity coefficient μ to the density p V is called the viscosity coefficient of fluid motion or kinematic viscosity, which is often used in engineering calculation.




V= mu /p




The unit of V is ST or S. 1St=1cm2/s。


安徽快3开奖结果Table 1-1 and table 1-2 show the value of mobility coefficient V of water at different temperatures Slurry pump


                      

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