COMPUTATIONAL FLUID DYNAMIC TECHNIQUE VALID AT THE CENTER-LINE FOR NON-AXISYMMETRIC PROBLEMS IN CYLINDRICAL COORDINATES

被引:27
作者
GRIFFIN, MD [1 ]
JONES, E [1 ]
ANDERSON, JD [1 ]
机构
[1] UNIV MARYLAND,DEPT AEROSP ENGN,COLLEGE PK,MD 20742
关键词
D O I
10.1016/0021-9991(79)90120-7
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
A technique is described for the numerical solution of non-axisymmetric flow problems posed in cylindrical coordinates when the z-axis is included in the flowfield. The highlight of the technique is the manner in which the singularities at the centerline are handled. Specifically, the governing flowfield equations at r = 0 are put in a special form by applying L'Hospital's Rule. The required radial derivatives are evaluated using a one-sided, second-order accurate, first-difference. This leads to a smooth, convergent calculation of the flow-field at the centerline. This appears to be the first generally applicable numerical method for avoiding coordinate system singularites in the context of a finite-difference scheme, and could have application to many non-axisymmetric flows. The technique is illustrated by specific results for the time-dependent flowfield inside an internal combustion engine. © 1979.
引用
收藏
页码:352 / 360
页数:9
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