Lattice Boltzmann simulation of free convection's hydrothermal aspects in a finned/multi-pipe cavity filled with CuO-water nanofluid. Issue 3 (4th March 2019)

• Record Type: Journal Article
• Authors: Rahimi, Alireza; Azarikhah, Pouria; Kasaeipoor, Abbas; Hasani Malekshah, Emad; Kolsi, Lioua
• Is Part Of: International journal of numerical methods for heat & fluid flow. Volume 29:Issue 3(2019)
• Page Start: 1058
• Page End: 1078
• Publication Date: 2019-03-04
• Subjects: Brownian motion -- Lattice Boltzmann method -- CuO-water nanofluid -- KKL model -- Nanoparticle shape factor; Heat -- Transmission -- Mathematics -- Periodicals; Fluid dynamics -- Mathematics -- Periodicals; 536.2
• DOI: 10.1108/HFF-07-2018-0349
• Languages: English
• ISSNs: 0961-5539

Abstract

Abstract : Purpose: This paper aims to investigate the natural convection fluid flow and heat transfer in a finned/multi-pipe cavity. Design/methodology/approach: The cavity is filled with the CuO-water nanofluid. The Koo–Kleinstreuer–Li model is used to estimate the dynamic viscosity and consider Brownian motion. On the other hand, the effect of the shapes of nanoparticles on the thermal conductivity and related heat transfer rate is presented. Findings: In the present investigation, the governing parameters are Rayleigh number, CuO nanoparticle concentration in pure water and the thermal arrangements of internal active fins and solid bodies. Impacts of these parameters on the nanofluid flow, heat transfer rate, total/local entropy generation and heatlines are presented. It is concluded that adding nanoparticles to the pure fluid has a significant positive influence on the heat transfer performance. In addition, the average Nusselt number and total entropy generation have direct a relationship with the Rayleigh number. The thermal arrangement of the internal bodies and fins is a good controlling tool to determine the desired magnitude of heat transfer rate. Originality/value: The originality of this paper is to use the lattice Boltzmann method in simulating the nanofluid flow and heat transfer within a cavity included with internal active bodies and fins.