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Proc	A. Chrzanowska, M. Kröger, W. Muschik, C. Papenfuss, H. Ehrentraut, S. Sellers Mesoscopic model of nematic liquid crystal viscosity AIP Conf. Proc. 469 (1999) 162
Viscous stress tensor cr is a crucial part of the macroscopic Navier-Stokes (NS) equation that governs flow of the medium. In the case of liquid crystals anisotropy of the system leads to numerous terms and viscosity coefficients in this tensor in order to describe flow properties. Recently there has been a lot of interest in calculating nematic viscosities. A common approach uses statistical models [1]. based on the Fokker-Planck (FP) equation approach introduced by Hess and Doi [2]. These theories have revealed that the viscosity coefficients can be expressed as certain polynomials in local equilibrium orientational order parameters multiplied by a dependent on the particle geometry and the rotational diffusion coefficient factor. [...]