搜搜做题作业网英语翻译When a fluid flows in a pipe,it moves fastest at the cen
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英语翻译
When a fluid flows in a pipe,it moves fastest at the center of the pipe and slowest at the wall because of friction between the pipe and the flowing fluid.2 When fluid flows relatively slowly,there can be a fairly thick layer of fluid near the pipe wall that hardly moves at all.This condition is known as laminar flow,and makes for poor heat transfer because the static layer of fluid near the wall act as a resistance to the movement of heat.When fluid is flowing rapidly,swirls and eddies are set up that reduce the thickness of the static layer near the pipe wall,and thereby decrease the resistance to the movement of heat-or increase the rate of heat transfer.This kind of agitated flow is known as turbulent flow.
When a fluid flows in a pipe,it moves fastest at the center of the pipe and slowest at the wall because of friction between the pipe and the flowing fluid.2 When fluid flows relatively slowly,there can be a fairly thick layer of fluid near the pipe wall that hardly moves at all.This condition is known as laminar flow,and makes for poor heat transfer because the static layer of fluid near the wall act as a resistance to the movement of heat.When fluid is flowing rapidly,swirls and eddies are set up that reduce the thickness of the static layer near the pipe wall,and thereby decrease the resistance to the movement of heat-or increase the rate of heat transfer.This kind of agitated flow is known as turbulent flow.
翻译结果：当流体在管内流动,它的移动速度最快的在管的中心和在墙上的慢由于管和流体流动之间的摩擦.2当流体流动相对缓慢,可以有一个相当厚的管壁附近,几乎在所有的流体运动.这种情况被称为层流,使传热差由于壁面附近的流体静力行为层作为热源的运动阻力.当流体流动迅速,漩涡设置,减少管壁附近的静态层的厚度,从而降低了耐热运动或增加的传热速率.这种激动的流动称为紊流.
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