Numerical Simulation of Effect of Tripping Rod on Increase in Lift Force Acting on a Cylinder Using Lattice Boltzmann Method

Abstract

The lattice Boltzmann method is used to examine the effect of tripping rods on the lift force acting on a circular cylinder subjected to flows with a Reynolds number ranging from 100 to 500. The ratios of the diameter of the tripping rod to that of the cylinder are 0.08, 0.10, and 0.11. The angular position of the tripping rod is varied from 20° to 120°. Numerical results show that the lift force is smaller than that without the tripping rod if the angular position ranges from 20° to 40°. Further, the numerical simulation shows that, if the angular position is greater than 50°, the lift force surpasses that without the tripping rod and is maximized if the angular position is around 80° for a case with a Reynolds number of 100 and 60° for a case with a Reynolds number of 500.