The research of fluid-solid coupling has sharp unsteady and nonlinear character, so the effect of viscosity have to be considered.

流固耦合具有强烈的非定常、非线性，因此黏性效应不可避免。

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If the pump noise at work, this is often due to low oil temperature, oil viscosity is too high, the oil into the air, or pump coupling loss causes such as excessive wear and tear.

假如泵在工作时产生噪音，这往往是因油温太低，油液粘度太高，油液中进入空气，联轴节失中或泵过度磨损等原因引起。

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But silica disperse in rubber difficult, although silane coupling agent has useful function in the white silica's dispersion and reduce the Mooney viscosity, but it also increased the elongation.

但白炭黑在橡胶中的分散很困难，虽然加入硅烷偶联剂有利于白炭黑的分散，能够降低胶料的门尼粘度，但还是不够，而且提高了胶料的定伸应力。

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