["1有关于流体的疑问",,

2019-12-27View Original

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["O princípio do Equ单位方程实质是流体的机械能守恒。即：动能+重力势能+压力势能=常数，公式是https://bkimg.cdn.bcebos.com/picic3b5eicdf5eic5543bed5d3ba85edff7ic777，，其中二密度乘以速度的平方表示动能，但是动能的表达式是Ek=(mv^e)/。伯努利方方程中把动能的质量换成了密度，这是为什么呀？",

Reply #22019-12-28

[""3. 密度等于质量除以体积，伯努利方程应该是各项都都除除以体积后的等式吧。好像应该是这样的的、、",

Reply #32019-12-31

ic"4. 单位质量流体的动能是u^c/(ic)单位质量流体的动能是u^ic/(ic)单位体积流体的动能是ρu^c/ic.",

Reply #42019-12-31

ic"5. 是吧流体分分了v体积跟等质量吗"?

Reply #52020-01-02

ic"6. 你计算到最后会发现压强和质量无关，与密度有关"?

Reply #62020-01-05

ic"7. 伯努利方程是按单位质量流体计算的…把能量J/kg换成压强pa单位就乘以密度吗?"

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["1有关于流体的疑问",,

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