%0 Journal Article
%T A modified variable physical properties model, for analyzing nanofluids flow and heat transfer over nonlinearly stretching sheet
%J Challenges in Nano and Micro Scale Science and Technology
%I University of Sistan and Baluchestan,
Iranian Society Of Mechanical Engineers
%Z 2821-000X
%A Akbarzadeh, Pooria
%D 2017
%\ 07/01/2017
%V 5
%N 2
%P 76-84
%! A modified variable physical properties model, for analyzing nanofluids flow and heat transfer over nonlinearly stretching sheet
%K Nanofluid
%K Nonlinear stretching sheet
%K Similarity solution
%K Modified variable physical properties model
%R 10.7508/tpnms.2017.02.001
%X In this paper, the problem of laminar nanofluid flow which results from the nonlinear stretching of a flat sheet isĀ investigated numerically. In this paper, a modified variable physical properties model for analyzing nanofluids flow and heat transfer is introduced. In this model, the effective viscosity, density, and thermal conductivity of the solid-liquid mixture (nanofluids) which are commonly utilized in the homogenous single-phase model, are locally combined with the prevalent single-phase model. A numerical similarity solution is considered which depends on the local Prandtl number, local Brownian motion number, local Lewis number, and local thermophoresis number. The results are compared to the prevalent single-phase model. This comparison depicts that the prevalent single-phase model has a considerable deviation for predicting the behavior of nanofluids flow especially in dimensionless temperature and nanoparticle volume fraction. In addition the effect of the governing parameters such as Prandtl number, the Brownian motion number, the thermophoresis parameter, the Lewis number, and etc. on the velocity, temperature, and volume fraction distribution and the dimensionless heat and mass transfer rates are examined.
%U https://chal.usb.ac.ir/article_3207_320d2c92df0f6230ec9f5b8f8d5c7bd4.pdf