CUDA-enabled LBM Flow Simulation around Three Equilateral Cylinders using GPU Computing Processor

ABSTRACT This study is concerned with the simulation of viscous flow past three equal diameter circular cylinders in equilateral-triangular arrangement. The hydrodynamic characteristics of cylinders are modelled by a 2Dlattice Boltzmann kernel which is constructed employing Compute Unified Device Architecture (CUDA) interface developed by nVIDIA. Computations using the developed kernel are performed for nine spacing ratios ranging from 1.0 to 5.0 considering four incident angles, , , and . The effects of spacing ratio among the three cylinders and the incident angle on drag and lift coefficients, vortex shedding frequencies from the three cylinders and the flow characteristics are examined. The magnitudes and frequencies of the fluctuating forces acting on the three cylinders are estimated for all test cases. 0 0 = α 0 30 0 60 0 90