TY - JFULL AU - Seungyeong Choi and Namkyu Lee and Dong Il Shim and Young Mun Lee and Yong-Ki Park and Hyung Hee Cho PY - 2017/1/ TI - Effect of the Cross-Sectional Geometry on Heat Transfer and Particle Motion of Circulating Fluidized Bed Riser for CO2 Capture T2 - International Journal of Mechanical and Mechatronics Engineering SP - 1929 EP - 1934 VL - 11 SN - 1307-6892 UR - https://publications.waset.org/pdf/10009201 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 132, 2017 N2 - Effect of the cross-sectional geometry on heat transfer and particle motion of circulating fluidized bed riser for CO2 capture was investigated. Numerical simulation using Eulerian-eulerian method with kinetic theory of granular flow was adopted to analyze gas-solid flow consisting in circulating fluidized bed riser. Circular, square, and rectangular cross-sectional geometry cases of the same area were carried out. Rectangular cross-sectional geometries were analyzed having aspect ratios of 1: 2, 1: 4, 1: 8, and 1:16. The cross-sectional geometry significantly influenced the particle motion and heat transfer. The downward flow pattern of solid particles near the wall was changed. The gas-solid mixing degree of the riser with the rectangular cross section of the high aspect ratio was the lowest. There were differences in bed-to-wall heat transfer coefficient according to rectangular geometry with different aspect ratios. ER -