中浓纸浆悬浮液湍流边界层的模拟  

Simulation of the Turbulent Boundary Layer of Medium-consistency Pulp Suspensions

作　　者：孙加龙[1] 陈克复[1] 朱冬生[2] 吴会军[2] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640 [2]华南理工大学化工学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2002年第9期19-22,共4页Journal of South China University of Technology(Natural Science Edition)

摘　　要：介绍纤维悬浮液的分类及管道中纸浆纤维悬浮液的流动状态 ,重点进行中浓纸浆悬浮液湍流边界层的模拟研究 ,详细分析了相关的模拟结果 ,得出如下结论 :当管子壁面距离 0～ 9× 10 - 4m时 ,横过水环厚度的速度分布是线性的 ;水环厚度很小 ,水环中的剪切作用是层流剪切 ,剪切力作用于纤维网络表面 .突出网络塞体表面 (0～ 9× 10 - 4m )的纤维甚少 .据此可认为网络塞体表面较为光滑 ;管道中远离壁面处浓度高 ,壁面处浓度低 。An outline of the classes of fibre suspensions and the state of the flow is given.We emphasis on the simulation of the turbulent boundary layer of medium_consistency pulp fibre suspensions and analyse the result of the simulation in detial.It is concluded that from the inner surface of the pipeline to 0～9×10 -4 m,the distribution of the velocity is linear across the water ring;the thickness of the water ring is very thin;the shear process is laminar shear;the shear force acts on the surface of the fibre net,the fibers that stand out the fibre net(0～9×10 -4 m) are very scarce.It can be inferred that the surface of the fibre net is quite smooth;the concentration is very high away from the inner surface while it is low on the surface of the pipeline,the distribution of the concentration shows a descending trend.

关 键 词：纸浆悬浮液 纤维悬浮液 湍流 边界层 数值模拟 浓度分布 速度分布 

分 类 号：O357.52[理学—流体力学]