A Numerical Study on the Fluid Flow Through Two Tandem Circular Cylinders with Different Sizes Using the Lattice-Boltzmann Method

EasyChair Preprint 9670

Abstract

This paper describes an investigation of fluid flow through two tandem circular cylinders using Lattice-Boltzmann Method in direct numerical simulation. The diameter ratio of two circular cylinders, D₁/D₂ varies from 0.5 to 1.5, and spacing ratio (L/D₂) varies from 1.5 to 10, whereas the Reynolds number of 100 is considered. The numerical model is well validated by comparing the results with those obtained in the literature. Flow regimes are observed, including two vortex shedding modes (two-layered and primary vortex). Furthermore, the flow characteristics depend significantly on the diameter ratio of two circular cylinders. The drag coefficient increases with an increase in D₁/D₂ while the Strouhal number generally decreases with increasing D₁/D₂. Additionally, the maximum Cʹ_L obtained is at L/D₂ = 5.0. The results obtained are very useful for many applications, such as tube bundles of heat exchangers, offshore risers, and pipe racks.

Keyphrases: Computational Fluid Dynamic, Direct Numerical Simulation, Lattice Boltzmann Method, Vortex flow, flow characteristic

@booklet{EasyChair:9670,
  author    = {Van Tuyen Vu and Viet Dung Duong and Ich Long Ngo},
  title     = {A Numerical Study on the Fluid Flow Through Two Tandem Circular Cylinders with Different Sizes Using the Lattice-Boltzmann Method},
  howpublished = {EasyChair Preprint 9670},
  year      = {EasyChair, 2023}}