Abstract
Three-dimensional laminar flow in the entrance region of rotating curved pipes was investigated. The governing equations were written in an orthogonal curvilinear coordinate system and solved with a fully three-dimensional numerical method. The development of secondary flow, axial velocity, local and average friction factors for different cases of rotation were given and discussed in detail. The results show that rotation influences the flow structure and friction factor greatly and that the secondary flow is sink-type in the early stage of development and then turns to vortex structure. The average friction factor and the intensity of secondary flow have drastic decrease near the entrance. At some proper rotation, the average friction factor can be noticeably reduced.
| Original language | English |
|---|---|
| Pages (from-to) | 418-423 |
| Number of pages | 6 |
| Journal | Journal of Hydrodynamics |
| Volume | 18 |
| Issue number | 4 |
| DOIs | |
| State | Published - Aug 2006 |
| Externally published | Yes |
Funding
To the authors’ best knowledge, there is no work relating to the developing flow in rotating curved pipes. How the rotation influences the flow in entrance region is not well understood. Moreover, because the developing flow inside the rotating curved pipes is fully three-dimensional, the parabolic computation could lead to results of low accuracy. The purpose of this paper is to develop a truly three-dimensional numerical code, not the quasi three-dimensional one as Ishigaki[4] or Chen et al.[11] used, to study laminar developing flow in rotating curved pipes. Our emphases are on the effects of * Project supported by the National Natural Science Foundation of China (Grant No: 10272096). Biography: MA Jian-feng (1980-), Male, Ph. D. Student
Keywords
- Developing flow
- Rotating curved pipe
- Secondary flow