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Journal Cover   CFD Letters
  [SJR: 0.304]   [H-I: 4]   [4 followers]  Follow
    
  This is an Open Access Journal Open Access journal
   ISSN (Print) 2180-1363
   Published by ISSR Journals Homepage  [3 journals]
  • The Use Lattice Boltzmann Numerical Scheme for Contaminant Removal from a
           Heated Cavity in Horizontal Channel

    • Authors: Nor Awadi C Sidik, Leila Jahanshaloo
      Abstract: This paper aims to study the effect of mixed convection heat transfer on the contaminant removal in a channel with a rectangular cavity. The lattice Boltzmann method is used to solve the fluid part while the particles dynamics are modeled using the Lagrangian method. The cold fluid is forced to flow inside channel while the bottom wall of cavity is heated and kept at a constant temperature. The effect of Grashof number in removal percentage at a constant Reynolds number is addressed in this work. It is found that the rate of contaminant removal can be increased by increasing theGrashof numberat particular flow Reynolds number.
      PubDate: 2014-09-27
      Issue No: Vol. 6 (2014)
       
  • Experimental and Numerical Study for Turbulent Flow Drag Reduction in
           District cooling systems

    • Authors: Sameh A. Elshafie, Sadek Z. Kassab, Mohamed M. Abo El-Azm
      Abstract: In the present study an experimental and numerical investigations were performed for District Cooling system in order to optimize the energy consumption as an application of the drag reduction phenomena. Simulation was carried out using finite volume method In order to maximize system efficiency by reducing pumping power due to the appearance of drag reduction phenomenon at certain concentrations of ethylene glycol in water. The drag reducing agent that was used is ethylene glycol (C2H6O2) which is considered as an organic liquid compound to be used as anti-freeze. Several concentrations were tested and the simulation results were in fair agreement with the experimental cases studied. Results showed that with increasing ethylene glycol concentration the drag reduction increases till it reaches a maximum value of 10% at concentration of 4000 PPM and drops after that according to the drag reduction phenomena.
      PubDate: 2014-09-27
      Issue No: Vol. 6 (2014)
       
  • Comments on "Lattice Boltzmann Analysis of 2-D Natural Convection
           Flow and Heat Transfer within Square Enclosure including an Isothermal Hot
           Block, by Naffouti, Zinoubi and Ben-Maad"

    • Authors: Ridha Djebali
      Abstract: In this letters we’ll present some comments concerning the paper entitled ‘Lattice Boltzmann Analysis of 2-D Natural Convection Flow and Heat Transfer within Square Enclosure Including an Isothermal Hot Block’ published in International Journal of Thermal Technologies (IJTT), vol. 3(4), pp. 146-154 (2013) by T. Naffouti, J. Zinoubi and R. Ben-Maad. The papers discusses laminar natural convection problem within square enclosure using a thermal lattice Boltzmann (LB) model. So that the comments drawn here are related especially to the lattice Boltzmann standards (norms) and the numerical parameters influencing the accuracy of the presented results such in particular the computed Nusselt number.
      PubDate: 2014-09-27
      Issue No: Vol. 6 (2014)
       
  • Numerical study of flow over annular-finned tube heat exchangers by
           different turbulent Models

    • Authors: Hossain Nemati, Mohammad Moghimi
      PubDate: 2014-09-27
      Issue No: Vol. 6 (2014)
       
 
 
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