The role of inter-particle collisions on elbow erosion

详细信息    查看全文

• 作者：Carlos Antonio Ribeiro Duarte^a ; Francisco José ; de Souza ; ^a ; ^{fjsouza@mecanica.ufu.br} ; Ricardo de Vasconcelos Salvo^b ; Vinicius Fagundes dos Santos^a
• 关键词：Eulerian-Lagrangian URANS approach ; One-way ; two-way and four-way coupling ; Elbow erosion modeling ; Particle impact angle ; Particle impact velocity ; Cushioning effect
• 刊名：International Journal of Multiphase Flow
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：89
• 期：Complete
• 页码：1-22
• 全文大小：7802 K
• 卷排序：89

文摘

A significant difference exists between the phase interactions for the low mass loading case (η=3.846%η=3.846%). Although one-way coupling and four-way coupling were found to be similar, the two-way coupling case showed a characteristic drift of the particles to the wall. A parametric variation of the surface roughness showed that the erosion depth monotonically diminishes with the roughness increase. The impact angle was not affected by the modification of the coefficients of friction. This proves that the alteration of the impact angle primarily occurs by changes in the surface roughness rather than the friction coefficients. The cushioning effect was captured by the simulations and the mechanisms involved in the process were proposed by the authors. For all different mass loading cases, the cushioning effect is restricted to regions near profiles A and C, whereas at the profile E such effect is unlikely to occur.