CFD modeling of a headbox with injecting dilution water in a central step diffusion tube

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• 作者：Xu Yang ; Jinsong Zeng ; ^{fezengjs@scut.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Kefu Chen ; Yucheng Feng
• 关键词：Computational fluid dynamics ; Headbox ; Turbulence model ; Species transport ; Pulp suspension
• 刊名：Chinese Journal of Chemical Engineering
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：24
• 期：10
• 页码：1313-1324
• 全文大小：1997 K

文摘

For engineering applications of water dilution controlling system, the fluid dynamics of a mixed flow was studied with computational fluid dynamics (CFD) simulations and self-designed experimental set-up. In order to examine the predictability of CFD model for the headbox in industrial scale, two pulp suspensions before mixing were treated as homogeneous flows separately. Standard k-ε turbulence models with the mass diffusion in turbulent flows-species transport approach were applied in the simulations. A numerical simulation of this headbox model was analyzed with semi-implicit method for pressure linked equations scheme with pressure–velocity coupling. Results show that the model can predict hydrodynamic characteristics of headbox with injecting dilution water in a central diffusion tube, and the distribution of water content at the outlet of the slice lip is ideally normal at different speeds.