Bilingual edition: English is preserved and Chinese follows each unit. Terminology uses the confirmed v20260916 glossary; automated semantic review remains traceable.
中英双语版：英文原文完整保留，中文紧随对应单元；术语采用 v20260916 确认表，自动语义审校结果可追溯。

Poiseuille's Law

泊肃叶定律
In the case of smooth flow (laminar flow), the volume flowrate is given by the pressure difference divided by the viscous resistance. This resistance depends linearly upon the viscosity and the length, but the fourth power dependence upon the radius is dramatically different. Poiseuille's law is found to be in reasonable agreement with experiment for uniform liquids (called Newtonian fluids) in cases where there is no appreciable turbulence.
在光滑流动（层流）的情况下，体积流量由压强差除以粘性阻力给出。这种阻力与粘度和长度成线性关系，但与半径的四次方关系则差异显著。泊肃叶定律在均匀液体（称为牛顿流体）的情况下与实验结果基本一致，当没有明显湍流时也成立。
Calculation
计算
Example: changing flow parameters
示例：改变流动参数
 Index

Poiseuille's law concepts
索引 埃奥菲定律概念
 
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Poiseuille's Law Calculation

泊肃叶定律计算
Poiseuille's law can be used to calculate volume flowrate only in the case of laminar flow.

泊肃叶定律只能用于计算体积流量，当且仅当流体处于层流状态时。
Any of the parameters below can be changed. When you have finished entering data, click on the quantity you wish to calculate in the formula above. The different parameters will not be forced to be consistent until you click on the quantity to calculate.
For pressure difference: x 10^ Pa = kPa
= atmos = mmHg = lb/in2 = cm water = inches water

applied to a tube of radius = cm = inches (corresponding to area =cm2 = in2)
and length = cm = inches,
for a fluid with viscosity = poise = x the viscosity of water,
the volume flowrate will be = cm3/s =in3/s=liters/min=ft3/min= U.S. gal/min.
Default values will be assigned to parameters to which you have not given values. You can change any of those default values as part of your exploration.
以下参数中的任意一个都可以进行更改。当你完成数据输入后，点击公式上方你希望计算的量。在点击计算量之前，不同的参数不会被强制保持一致。对于压强差：x 10^ Pa = kPa = atmos = mmHg = lb/in 2 = cm water = inches water applied to a tube of radius = cm = inches (corresponding to area = cm 2 = in 2 ) and length = cm = inches, for a fluid with viscosity = poise = x the viscosity of water, the volume flowrate will be = cm 3 /s = in 3 /s= liters/min= ft 3 /min= U.S. gal/min. 没有给出值的参数将被赋予默认值。你可以将这些默认值作为探索的一部分进行更改。
中文译文中的待填/计算数值依次对应：1：pb 2：pp 3：pk 4：pa 5：pm 6：psi 7：pcw 8：piw 9：r 10：rc 11：a 12：ac 13：L 14：Lc 15：v 16：vw 17：f 18：fi 19：fl 20：ff 21：fg。实际数值以上方原输入框为准。
 Index

Poiseuille's law concepts
索引 埃奥菲定律概念
 
HyperPhysics***** Mechanics ***** Fluids
HyperPhysics ***** 力学 ***** 流体
R Nave
 Go Back
返回