• Immiscible multicomponent lattice Boltzmann model for fluids with high relaxation time ratio

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      https://www.ias.ac.in/article/fulltext/pram/083/04/0557-0570

    • Keywords

       

      Multicomponent; high relaxation time ratio; lattice Boltzmann method.

    • Abstract

       

      An immiscible multicomponent lattice Boltzmann model is developed for fluids with high relaxation time ratios, which is based on the model proposed by Shan and Chen (SC). In the SC model, an interaction potential between particles is incorporated into the discrete lattice Boltzmann equation through the equilibrium velocity. Compared to the SC model, external forces in our model are discretized directly into the discrete lattice Boltzmann equation, as proposed by Guo et al. We develop it into a new multicomponent lattice Boltzmann (LB) model which has the ability to simulate immiscible multicomponent fluids with relaxation time ratio as large as 29.0 and to reduce `spurious velocity’. In this work, the improved model is validated and studied using the central bubble case and the rising bubble case. It finds good applications in both static and dynamic cases for multicomponent simulations with different relaxation time ratios.

    • Author Affiliations

       

      Tao Jiang1 Qiwei Gong1 Ruofan Qiu1 Anlin Wang1

      1. College of Mechanical Engineering, Tongji University, 4800# Cao’an Road, Shanghai 201804, China
    • Dates

       
  • Pramana – Journal of Physics | News

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