Comparative numerical study of single and two-phase models of nanofluid heat transfer in wavy channel

doi:10.1007/s10483-014-1839-9

Abstract

Abstract:

The main purpose of this study is to survey numerically comparison of twophase and single phase of heat transfer and flow field of copper-water nanofluid in a wavy channel. The computational fluid dynamics (CFD) prediction is used for heat transfer and flow prediction of the single phase and three different two-phase models (mixture, volume of fluid (VOF), and Eulerian). The heat transfer coefficient, temperature, and velocity distributions are investigated. The results show that the differences between the temperature field in the single phase and two-phase models are greater than those in the hydrodynamic field. Also, it is found that the heat transfer coefficient predicted by the single phase model is enhanced by increasing the volume fraction of nanoparticles for all Reynolds numbers; while for the two-phase models, when the Reynolds number is low, increasing the volume fraction of nanoparticles will enhance the heat transfer coefficient in the front and the middle of the wavy channel, but gradually decrease along the wavy channel.

Key words: wavy channel, probabilistic norm, probabilistic bounded set, probabilistic non-unbounded set, resonance theorem, semi implicit method for pressure linked equation (SIMPLE) method, nanofluid, two-phase model

2010 MSC Number:

O414.1

M. M. RASHIDI;A. HOSSEINI;I. POP;S. KUMAR;N. FREIDOONIMEHR. Comparative numerical study of single and two-phase models of nanofluid heat transfer in wavy channel. Applied Mathematics and Mechanics (English Edition), 2014, 35(7): 831-848.

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