Free convection analysis in a Γ-shaped heat exchanger using lattice Boltzmann method employing second law analysis and heatline visualization

KhakRah, H ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1108/HFF-12-2018-0767
  3. Publisher: Emerald Group Publishing Ltd , 2019
  4. Abstract:
  5. Purpose: The nanofluid flow and heat transfer within a heat exchanger, with different thermal arrangements of internal active bodies, are investigated. Design/methodology/approach: For the numerical simulations, the lattice Boltzmann method is utilized. The KKL model is used to predict the dynamic viscosity of CuO-water nanofluid. Furthermore, the Brownian method is taken account using this model. The influence of shapes of nanoparticles on the heat transfer performance is considered. Findings: The results show that the platelet nanoparticles render higher average Nusselt number showing better heat transfer performance. In order to perform comprehensive analysis, the heatline visualization, local and total entropy generation, local and average Nusselt variation are employed. Originality/value: The originality of this work is carrying out a comprehensive investigation of nanofluid flow and heat transfer during natural convection using lattice Boltzmann method and employing second law analysis and heatline visualization. © 2019, Emerald Publishing Limited
  6. Keywords:
  7. CuO-water nanofluid ; Heat exchanger ; Heatline visualization ; Lattice boltzmann method ; Second law analysis ; Copper oxides ; Entropy ; Heat exchangers ; Kinetic theory ; Nanofluidics ; Nanoparticles ; Natural convection ; Numerical methods ; Visualization ; Brownian method ; Comprehensive analysis ; Design/methodology/approach ; Dynamic viscosities ; Nanofluid flow ; Nanofluids ; Heat transfer performance
  8. Source: International Journal of Numerical Methods for Heat and Fluid Flow ; Volume 29, Issue 9 , 2019 , Pages 3056-3074 ; 09615539 (ISSN)
  9. URL: https://www.emerald.com/insight/content/doi/10.1108/HFF-12-2018-0767/full/html