雷诺数 - 维基百科，自由的百科全书
在 流体力学 中， 雷诺数 （Reynolds number）是 流体 的 惯性 力 与 黏性 力 的比值，它是一个 無量纲量。 雷諾數較小時，黏滯力對流場的影響大於慣性力，流場中流速的擾動會因黏滯力而衰減，流體流動穩定，為 層流；反之，若雷諾數較大時，慣性力對流場的影響大於黏滯力，流體流動較不穩定，流速的微小變化容易發展、增強，形成紊亂、不規則的 紊流 流場。 雷諾數一般表示如下： 其中. 对于不同的流场，雷诺数可以有很多表达方式。 这些表达方式一般都包括流体性质（ …
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Meaning, origin and history of the name Reynold
2022年12月7日 · From the Germanic name Raginald, composed of the elements regin "advice, counsel, decision" and walt "power, authority". The Normans (who used forms like Reinald or Reinold) brought the name to Britain, where it reinforced rare Old English and Norse cognates already in existence.
Reynolds number - Wikipedia
In fluid dynamics, the Reynolds number (Re) is a dimensionless quantity that helps predict fluid flow patterns in different situations by measuring the ratio between inertial and viscous forces. [2] . At low Reynolds numbers, flows tend to be dominated by laminar (sheet-like) flow, while at high Reynolds numbers, flows tend to be turbulent.
雷诺（英国力学家、物理学家）_百度百科
雷诺（Osborne Reynolds 1842～1912年）英国力学家、 物理学家 、工程师。 1842年8月23日生于 北爱尔兰 的贝尔法斯特，1912年2月21日卒于萨默塞特的沃切特。 雷诺是英国力学家、物理学家、工程师。 1842年8月23日生于北爱尔兰的贝尔法斯特，1912年2月21日卒于萨默塞特的沃切特。 早年在工场做技术工作。 1867年毕业于 剑桥大学 王后学院。 1868年起出任曼彻斯特欧文学院（后改名为 维多利亚大学）的首席工程学教授。 1877年当选为皇家学会会员。 1888年获皇 …
Reynolds Number - The Engineering ToolBox
Reynolds Number - the non-dimensional velocity - can be defined as the ratio. and interpreted as the ratio. Reynolds Number can therefore be expressed as. For a pipe or duct the characteristic length is the hydraulic diameter . The Reynolds Number for the flow in a duct or pipe can with the hydraulic diameter be expressed as.
Reynold - Wikipedia
Reynold is an English masculine given name that comes from an Old High German personal name made up of the element "ragin" (advice, decision) and "wald" (power, authority, brightness). It is a cognate of Rögnvaldr, which is also a source of the name Ronald. The Normans brought the name to England.
What is the Reynolds Number? The Equation for Reynolds Number …
Reynolds Number (Re) is a convenient parameter that helps in predicting if a fluid flow condition will be laminar or turbulent. We know that Reynolds Number (Re)=inertia force/viscous force.
Reynolds Number: Definition, Equation, and Solved Problem
2023年7月28日 · Reynolds number is a term associated with fluid mechanics that predicts the pattern in which fluid flows under different situations. In other words, it determines whether a fluid flow is laminar or turbulent. The flow is laminar at a low Reynolds number, and at a high Reynolds number, the flow is turbulent.
Reynolds' Number - an overview | ScienceDirect Topics
The Reynolds number represents the ratio of inertial to viscous forces within a fluid and is used to indicate the laminar or turbulent nature of a flow. You might find these chapters and articles relevant to this topic. Paul J. LaNasa, E. Loy Upp, in …
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