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dhz51

银虫 (初入文坛)

[交流] viscous dissipation如解解释?

viscous dissipation如解解释?

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宁静致远391

粘性耗散
2楼2007-12-27 13:16:35
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lihx_susan

金虫 (正式写手)

viscous dissipation粘滞耗散,粘滞消耗,粘滞扩散,粘滞消散
虫子到蝴蝶的蜕变中
3楼2007-12-27 16:18:57
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xhzyyangyang

木虫 (正式写手)

粘性耗散; 粘滞耗散
4楼2007-12-27 21:12:21
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dhz51

银虫 (初入文坛)

粘性耗散
到底是什么意思?有无实例说明一下?谢谢。
5楼2007-12-30 09:27:43
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vbxn

木虫 (正式写手)

粘性耗散; 粘滞耗散(下面为英文释意)

dissipation—(Also called viscous dissipation.) In thermodynamics, the conversion of kinetic energy into internal energy by work done against the viscous stresses.
Sometimes the rate of conversion per unit volume is meant. If the Navier–Stokes equations of viscous flow are employed, Rayleigh's mathematical expression for the rate of viscous (or frictional) dissipation per unit volume is



where μ is the dynamic viscosity. The Navier–Stokes assumptions thus satisfy the primary requirement of the second law of thermodynamics that the rate of dissipation be positive and the process irreversible. In a turbulent fluid, which the atmosphere usually is, dissipation is the end result of the turbulent scale process, by which kinetic energy is transferred from its originating, or outer, scale to the dissipation scales by nonlinear dynamical interactions. Most dissipation occurs at scales near the Kolmogorov microscale λd, given by



where ν is the kinematic viscosity and ε is the rate of energy dissipation per unit mass. See also stress tensor, energy equation.
          Brunt, D., 1941: Physical and Dynamical Meteorology, 285–286.
6楼2007-12-30 12:33:47
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dhz51

银虫 (初入文坛)

引用回帖:
Originally posted by vbxn at 2007-12-30 12:33:
dissipation—(Also called viscous dissipation.) In thermodynamics, the conversion of kinetic energy into internal energy by work done against the viscous stresses.
Sometimes the rate of conversio ...

您给的公式没有显示,能否再发一下,非常感谢,祝08快乐。
7楼2008-01-02 19:19:05
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taotao991

银虫 (小有名气)

粘性耗散; 粘滞耗散,汉英科技大词典中都是这样翻译的
8楼2008-01-03 08:20:55
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