Bulk and shear viscosity of a fluid interacting via dissipative and random forces
Gerhard Jung (Institut für Physik)

Exact values for shear and bulk viscosity are important to characterize a solvent and they are a necessary input for a continuum description. There exist various well-known methods to study the rheology of fluids that are interacting via conservative forces only. However, the correct treatment of random and dissipative forces is still under debate. In this paper we present fully consistent results for both viscosities using Green-Kubo relations and non-equilibrium molecular dynamics (NEMD). Green-Kubo relations are calculated using the formulas derived by Ernst and Brito [1], while NEMD results were obtained using two novel techniques based on ideas of Müller-Plathe [2] and Backer [3].

[1] M.H. Ernst and R. Brito, Europhys. Lett. 73, 183 (2006)
[2] Florian Müller-Plathe, Phys. Rev. E 59, 4894 (1998)
[3] J. Backer, C. Lowe, H. Hoefsloot and P. Iedema, J. Chem. Phys. 122, 154503 (2005)