drag flow

基本解釋

The drag of flow in pipes can be greatly reduced by adding a very small amount of high molecular polymer to water.
在清水里加入微量的高分子聚合物，可以大大降低管路阻力。
The differences of coefficient of drag of flow and convection heat transfer between sewage and clean water are analyzed.
并給出與清水相比，流動阻力增大與對流換熱系數(shù)減小的幅度。
This article mainly describes the development status and prospects of computational fluid dynamics (CFD) concerning the drag and flow field in ship hydrodynamics.
本文著重評述船舶水動力學(xué)中有關(guān)阻力和流動領(lǐng)域計算流體力學(xué)（CFD）發(fā)展現(xiàn)狀和前景。