Investigation of a New Effective Viscosity Model for Nanofluids

In this paper a new viscosity model is proposed in order to predict the viscosity of the nanofluids in order to bridge the gap on this issue. The effective viscosity expression proposed in this paper is based on the regression analysis of a number of carefully selected published papers which covers theoretical, experimental and numerical results. Compared with the other theoretical models that are available in literature, the presented model has a good accuracy and reliability. The proposed model has been tested in 3D horizontal pipe and the results with Nusselt number show good agreement with available data. The model was tested for a wide range of volume concentration and temperature and shows wider applicability.