Abstract
The method of non-equilibrium density matrix has been used to express the viscosity of liquid substances resulting in a simple computation algorithm of η as a function of temperature and several other parameters of the system. An adequate transition from the correlator to the tensor of the energy-momentum flux connected to the viscosity η to a simple integral relationship is proposed. The developed formula enables one to obtain qualitatively consistent results and significantly simplifies abundant and complex computations. The method of functional integration is used to analyse the possibility to describe the behaviour of η( T − T g) in the domain of freezing T g.
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