It sums up the definition, general expressing formula and general calculating method of flux in any vector field by analyzing the flux in the speed field, electric field and magnetic field of fluid.

文章通过对流体的速度场、电场和磁场中通量的解析，总结出了任意的矢量场通量的定义、一般表达式及一般计算方法。

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Also discussed is the effect of parameters such as in tube fluid Reynolds number (in the absence of fouling) and dimensionless heat flux density on the above mentioned increment number.

讨论了管内流体雷诺数(无污垢时)和无因次热流密度等参数对无因次熵产相对增加数的影响。

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The many kinds of heat losses of fluid flow on the temperature boundary layer in pipeline are a part of the total heat flux.

在利用热边界层减阻的电加热管道中，为了计算管道加热的热流量，除了热边界层流动的流体传热外，还需考虑整个管道的热损失。

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