学术
偏心圆环管中非牛顿流体流动的数值计算
许彬[1] 张敏[1] 王秀春[2] 房萍萍[1]
[1]南京理工大学动力工程学院,江苏南京210094 [2]河北工业大学能源与环境工程学院,天津300132
摘 要:
通过坐标变换，在偏心圆环域中生成正交结构化网格，用有限差分法以及二阶精度的离散格式，研究计算非牛顿流体在充分发展层流情况下的流动特性，并将其计算结果同牛顿流体和实验结果相比较．在不同偏心率（0≤ε^＊≤0．6），不同半径率（0．2≤r^＊≤0．8），和不同流体指数（0．2≤n≤1）范围内寻找流动滞止规律，以此为石油化工工业生产过程提供有参考性的结果．[著者文摘]
文章出处:
《河北工业大学学报》-2007年36卷5期 -77-82页
分 类 号:
文献标识码:
A
文章编号:
1007-2373（2007）05-0077-06
Chatacteristics of Laminar Viscous Non_Newtonian Fluid Flows in Eccentric Annular Channels
XU Bin, ZHANG Min, WANG Xiu-chun, FANG Ping-ping （1. School of Power Engineering, Nanjing University of Science ＆ Technology, Nanjing 210094, China; 2. School of Energy and Environment Engineering, Hebei University of Technology, Tianjin 300132, China ）
Abstract:
The eccentric annular duct can be mapped into the orthogonal structured meshes by using coordinate transformation. The finite-difference techniques and the second-order accurate discretization were used to research different characteristics about laminar fully developed flowing of non-Newtonian fluids in the annular channels. Computational solutions from a wide range of annulus aspect ratio （0.2 ≤ r^＊ ≤ 0.8）, inner core eccentricity （0 ≤ ε^＊ ≤ 0.6 ） and fluid index （0.2 ≤ n ≤ 1） are presented by comparing this solution with Newtonian fluids and experiment results. The rule how the eccentricity causes the flow to stagnate can be obtained from the numerical calculation, which can provide some useful and reasonable results to many oil and gas industrial processes.[著者文摘]
Key words:
eccentric annulus; fully developed laminar flow; non_Newtonian fluids; structured mesh; coordinates transformation
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