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Cooling Flows of Self-Gravitating, Rotating, Viscous Systems

机译:自重,旋转,粘性系统的冷却流

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摘要

We obtain self-similar solutions that describe the dynamics of aself-gravitating, rotating, viscous system. We use simplifying assumptions; butexplicitly include viscosity and the cooling due to the dissipation of energy.By assuming that the turbulent dissipation of energy is as power law of thedensity and the speed v_{rms} and for a power-law dependence of viscosity onthe density, pressure, and rotational velocity, we investigate turbulentcooling flows. It has been shown that for the cylindrically and the sphericallycooling flows the similarity indices are the same, and they depend only on theexponents of the dissipation rate and the viscosity model. Depending on thevalues of the exponents, which the mechanisms of the dissipation and viscositydetermine them, we may have solutions with different general physicalproperties. The conservation of the total mass and the angular momentum of thesystem strongly depends on the mechanisms of energy dissipation and theviscosity model.
机译:我们获得了描述自重,旋转,粘性系统动力学的自相似解。我们使用简化的假设;但是假定能量的湍流消散是密度和速度v_ {rms}的幂律,并且粘度的幂律依赖于密度,压力和旋转速度,我们研究湍流冷却流。结果表明,对于圆柱冷却流和球形冷却流,相似指数是相同的,它们仅取决于耗散率和粘度模型的指数。根据指数的值(耗散和粘度的机制决定它们的大小),我们可能会得到具有不同一般物理性质的解决方案。系统的总质量和角动量的守恒在很大程度上取决于能量耗散的机理和粘度模型。

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