Secondary velocity and mixing characteristics of pulsatile flow in small-amplitude sinusoidal vessels

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• 作者：Minh Tuan Nguyen ; Sang-Wook Lee
• 关键词：Small ; amplitude sinusoidal vessel ; Secondary velocity ; Mixing ; Pulsatile flow ; Computational fluid dynamics
• 刊名：Journal of Mechanical Science and Technology
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：30
• 期：3
• 页码：1217-1224
• 全文大小：10,333 KB
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• 作者单位：Minh Tuan Nguyen (1)
  Sang-Wook Lee (2)
  
  1. Department of Mechanical Engineering, The Graduate School, University of Ulsan, Ulsan, 44610, Korea
  2. School of Mechanical Engineering, University of Ulsan, Ulsan, 44610, Korea
  
• 刊物类别：Engineering
• 刊物主题：Mechanical Engineering
  Structural Mechanics
  Control Engineering
  Industrial and Production Engineering
  
• 出版者：The Korean Society of Mechanical Engineers
• ISSN：1976-3824

文摘

Numerical simulations on pulsatile flow within sinusoidally wavy shaped vessels were conducted for mean Reynolds number of 350, which is in the range of physiological flow rates. We considered the constant pitch of six tube diameters 6D and relatively small amplitudes from A = 0.1D to 0.5D for sinusoidal vessel geometry and investigated the secondary velocity profiles and particle mixing characteristics. The results showed that relatively small amplitude of wavy vessel geometry has significant influence on the nature of flow patterns and particle mixing characteristics. This implies that characterizing accurate geometry is essential for accurate prediction of in vivo hemodynamics and may motivate further study on any possibility of reflection of secondary flow on vascular remodeling and pathophysiology.