Study of the Effect of Thermo-Physics Parameters in Nano Fluid Non-Newtonian in the Heat Exchanger

علوم کاربردی و محاسباتی در مکانیک

Articles in Press, Accepted Manuscript, Available Online from 26 October 2024   

Document Type: Original Article

DOI: 10.22067/jacsm.2024.86865.1242

Authors

Kourosh Javaherdeh^{* 1}; habib karimi²

¹Faculty of Mechanical Eng. University of Guilan

²Department of mechanical engineering, Roudsar and Amlash branch, Islamic Azad University, Roudsar, Iran,

Abstract

This study investigated mixed convection heat transfer laminar flow Non Newtonian in heat exchangers helical coils with Nanofluids. Volumetric concentration of nanoparticles are with 0 to 2% and power law indexes are 0.81, 0.85 and 0.91 in this Non-Newtonian flow. Momentum and energy equations solved based on finite volume and simple algorithm method. The effect of power law index, Richardson number, pitch in helical coils and volumetric concentration of nanoparticles are studied on Nusselt number. Results showed that the heat transfer coefficient was increased by increasing volumetric concentration of nanoparticles from 0 to 2%. Also, Nusselt number increased by decreasing power law index and friction coefficient. Heat transfer coefficient was increased by increasing pitch coil and volumetric concentration of nanoparticles, in other word, Nusselt number is increased with 7% when pitch coil is varied from 0.05 to 0.1. Buoyancy forces effected on pattern of Temperature distribution and velocity of flow in helical coils and Temperature distribution become more uniform with increasing Buoyancy forces.

Keywords

Nano fluids; Non-Newtonian; heat exchangers helical coils; mix convection; Numerical study

References