Developing flow in a concentric annulus
Developing flow in a concentric annulus
复制标题
在同心环中发展流动
DOI：
10.1016/0045-7825(81)90024-4
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发表时间：
1981
影响因子：
7.2
通讯作者：
V. Garg
中科院分区：
文献类型：
--
作者：
S. Gupta;V. Garg
采用隐式有限差分格式计算了同心环形管道进口段的层流流动。给出了环空半径比γ=a/b和环空内外壁半径较大范围内的速度分布、压降和入口长度的计算结果。结果表明，γ=0.8时的计算结果与平行板通道(γ=1.0时)的计算结果相近，而γ=0.001时的计算结果与圆管(γ=0)时的计算结果相差很大。所得结果也与Sparrow和Lin[1]用线性化方法得到的结果进行了比较。在计算上，本方法比Sparrow和Lin快两个数量级。
An implicit finite difference scheme is used for determining the laminar flow in the hydrodynamic entrance region of concentric annular ducts. The results for velocity distribution, pressure drop and entrance length are presented for a wide range of annulus radius ratiosγ=a/b;aandbbeing the radii of inner and outer walls of the annulus. It is found that while results forγ= 0.8 are similar to those for a parallel plate channel (γ= 1.0), those forγ= 0.001 depart significantly from those for a circular pipe (γ= 0). The results also compare well with those reported by Sparrow and Lin [1] using the linearization method. Computationally the present method is about two orders of magnitude faster than that of Sparrow and Lin.