Experimental study of fixed-bed flow characteristics for a cylinder with different porousities

To clarify the effect of different porosity to a porous cylinder, a series of experiments were executed. The Profiling Velocimeter was used to measure the flow field around and behind the porous cylinder, including the depth-averaged velocity distribution, time sequence analysis of velocity and disturbance level to examine the characteristics of the effect due to different porous cylinder. Comparison of the experiment results and the related researches, the velocity and turbulence intensity after the impermeable cylinder was intensely changed. However, the flow field after the porous cylinder was steady and a steady low-velocity region was formed. In present experiment reports, as the porosity increased, the maximum velocity decay value decreased and the position where the minimum velocity occurred would move towards to downstream direction. While the porous cylinder was applied in the field, these results could provide as a design reference.