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Numerical simulation of fluid flow of two rotating side-by-side circular cylinders by lattice Boltzmann method. (English) Zbl 1267.76092

Summary: A numerical investigation of the two-dimensional laminar flow around side-by-side rotating circular cylinders using Lattice Boltzmann method is conducted. The effects of variation of rotational speed ratio \(\beta\) and different gap spacings \(g^*\) at Reynolds number of 100 are studied. A various range of rotational speed ratio \(0\leq \beta \leq 2\) for four different gap spacings of 3, 1.5, 0.7 and 0.2 are investigated. Flow conditions and its characteristics, such as lift and drag coefficients and Strouhal number, is studied. The results indicated that as \(\beta\) increases, the flow changes its condition from periodic to steady after a critical rotational speed. Results also indicated that variation of the gap spacing and rotational speed has significant effect on wake pattern. Wake pattern in turn has significant effect on the Strouhal number. Finally, the result is compared with experimental and other numerical data.

MSC:

76M28 Particle methods and lattice-gas methods
76U05 General theory of rotating fluids
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