Drag Reduction Mechanism in Pipe Flow of Casson Fluid and Calculation of Drag Reduction Rate
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摘要: 分析了流體與固體管壁之間的粘附功,揭示了卡森流體管內流動時的減阻機理,認為流體在流動過程中滑移的產生是減阻的本質.推導出了卡森流體的減阻率表達式,討論了各參量對減阻率的影響,并提出了實現卡森流體減阻的措施.Abstract: With the exploration of the adhesive work between fluid and pipe-wall, the drag reduction mechanism for the pope flow of Casson fluid is brought to light. It is belived that wall slip is the nature of drag reduction when fluid flows in pipe flow. Further more, the drag reduction rate in pipe flow is presented, and the relevant factors are also analyzed systematically. Some pratical measure are provided to realizing dragreduction of pipe flow of Casson fluid.
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Key words:
- Casson fluid /
- pipe flow /
- drag reduction /
- viscosity /
- adhesive work /
- shear stress
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