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什么叫流管、流束、过流断面和元流？
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什么叫流管、流束、过流断面和元流？
时间：2022-06-23 19:24
关键词：
化工流体力学
化学工程
结构力学
土木建筑工程
答案解析
<p> 在流场内，取任意非流线的封闭曲线L，经此曲线上的全部点做流线，这些流线组成的管状流面称为流管。流管内的全部流体称为流束。当流束的断面dA无限小时的微小流束，称为元流。在元流和总流中，凡是与流线处处相垂直的横断面，称为流体的过流断面。</p>
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