V2EX no-slip condition

No-slip Condition

Definition / 定义

无滑移条件:流体力学中的一种边界条件,指在固体壁面处,紧贴壁面的流体与壁面没有相对滑动,因此流体在壁面处的切向速度等于壁面的速度(静止壁面时通常为 0)。该条件是边界层理论、管流与黏性流动分析中的基础假设。

Pronunciation / 发音

/no slp kndn/

Examples / 例句

The no-slip condition means the fluid’s velocity at the wall is zero.
无滑移条件表示流体在壁面处的速度为零。

In boundary-layer analysis, engineers apply the no-slip condition at the surface to predict shear stress and drag accurately.
在边界层分析中,工程师在物体表面施加无滑移条件,以更准确地预测剪切应力和阻力。

Etymology / 词源

no-slipno(不、没有)+ slip(滑动)构成,字面意思是“无滑动”;condition 来自拉丁语 condicio,在科学语境中常指“条件/约束”。该术语在黏性流体理论发展过程中被固定用来描述“壁面处速度匹配”的边界约束。

Related Words / 相关词

Literary Works / 文学作品

  • Boundary-Layer Theory(L. Schlichting & K. Gersten):在边界层章节中系统使用无滑移条件作为壁面边界设定。
  • An Introduction to Fluid Dynamics(G. K. Batchelor):讨论黏性效应与壁面边界条件时涉及无滑移条件。
  • Viscous Fluid Flow(Frank M. White):在管流、近壁流动与剪切应力推导中频繁出现该条件。
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