G302 FLOW AND HEAT TRANSFER ANALYSIS OF PARTICULATE TWO-PHASE FLOW THROUGH A VERTICAL PIPE OF FINITE LENGTH(Heat transfer enhancement)

スポンサーリンク

概要

• 論文の詳細を見る

• In the present study, numerical simulations on the flow field and the particles trajectories in particulate vertical pipe flow are performed. The effect of several models governing particle's behavior is tested for a fully developed flow case ahead of more extensive three-dimensional analysis of a circulating fluidized bed heat exchanger. From the present study, the following conclusions could be made: (1) In the case of fully developed flow, particles are mostly under the influence of radially inward lift force due to the velocity gradient in the radial direction. (2) Three-dimensional analysis of the exchanger demonstrates the existence of non axi-symmetric swirling flow inside the vertical pipe of finite length. (3) For most particles are fluidized around the circumference of the baffle plate hole, the size of the hole and the local flow condition may provide initial conditions for particle trajectories, which suggests the importance of the fluidizing mechanism of particles. (4) Numerical simulation shows the possibility of particles' multiple impacts on the wall which reduce particles average velocity and increase pressure loss through the pipe.

• 一般社団法人日本機械学会の論文
• 2000-10-01

著者

• Jun Yong-du

  Kongju National University

• Lee Kum-Bae

  Kongju National University

関連論文

• G302 FLOW AND HEAT TRANSFER ANALYSIS OF PARTICULATE TWO-PHASE FLOW THROUGH A VERTICAL PIPE OF FINITE LENGTH(Heat transfer enhancement)

スポンサーリンク