V2EX elongational flow

Elongational Flow

定义 Definition

elongational flow(也称 extensional flow)指延伸(伸长)流/拉伸流:一种流体流动形式,其中流体微团主要经历沿某一方向被拉长、在垂直方向被压缩的变形(以“伸长变形率/延伸率”为特征),常见于聚合物加工、纤维拉伸、喷墨、微流控收缩通道等场景。除这一常用技术义外,flow 也可泛指“流动/流量/流程”等。

发音 Pronunciation (IPA)

/ilenl flo/

例句 Examples

Elongational flow can stretch polymer chains.
延伸流可以拉伸聚合物链。

In a converging microchannel, the liquid experiences strong elongational flow that can dominate the measured stress response.
在收缩的微通道中,液体会经历强烈的延伸流,这种流动可能主导所测得的应力响应。

词源 Etymology

elongational 来自 elongation(“伸长、延长”)+ 形容词后缀 -al(“……的”);elongation 源于拉丁语 elongare(使变长)。flowflōwan(流动)。合起来直译即“伸长性的流动”。

相关词 Related Words

文献作品 Literary Works

  • Dynamics of Polymeric Liquids(Bird, Armstrong & Hassager)
  • Rheology: Principles, Measurements, and Applications(Christopher W. Macosko)
  • Constitutive Equations for Polymer Melts and Solutions(R. B. Bird 等)
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