Try these:

H.C. Brinkman, The viscosity of concentrated suspensions and solutions, Journal of Chemical Physics, 20 (4) (1952), pp. 571–581

S Mueller, E.W. Llewellin, H.M. Mader, The rheology of suspensions of solid particles,

Proceedings of the Royal Society A, Mathematical, Physical and Engineering Sciences, 466 (2116) (2010), pp. 1201–1228

S.H. Maron, P.E. Pierce Application of Ree–Eyring generalized flow theory to suspensions of spherical particles Journal of Colloid Science, 11 (1) (1956), pp. 80–95

A new model for calculating the effective viscosity of nanofluids, N Masoumi et al 2009 J. Phys. D: Appl. Phys. 42 055501

Review on Nanofluid Theoretical Viscosity Models _98_.pdf, 2012

http://www.ijeir.org/index.php/issue?view=publication&task=show&id=42

Viscosity-prediction models of ammonia water nanofluids based on various dispersion types, 2012, Authors: Liu Yang, Kai Du, Yue Hong Ding, Bo Chenga, Yan Jun Li

Jesús Betancourt Mena, Anderson Antonio Ubices de Moraes, Yipsy Roque Benito, Gherhardt Ribatski, José Alberto Reis Parise, "Extrapolation of Al2O3–water nanofluid viscosity for temperatures and volume concentrations beyond the range of validity of existing correlations", Applied Thermal Engineering, Volume 51, Issues 1–2, March 2013, Pages 1092-1097

L. Syam Sundar, Manoj K. Singh, Antonio C.M. Sousa, "Investigation of thermal conductivity and viscosity of Fe3O4 nanofluid for heat transfer applications", International Communications in Heat and Mass Transfer, Volume 44, May 2013, Pages 7-14

Thank you all

Hi,Sayatan.you could search the papers focused on viscosity of nanofluid in Elsevier database.I have searched a lot before.If in need,I am willing to send some to you.

you can find some information in this paper:

"Oscillatory dissipation of a simple confined liquid" A Maali, T Cohen-Bouhacina, G Couturier, JP Aimé, Physical review letters 96 (8), 086105.