JOURNAL OF CHEMICAL ENGINEERING OF JAPAN | |
NUMERICAL FLOW ANALYSIS OF PULSATILE FLOW IN A CHANNEL WITH SYMMETRIC WAVY WALLS AT MODERATE REYNOLDS NUMBERS | |
TADASHI YOSHINO1  YUJI KAWAMURA1  TATSUO NISHIMURA1  | |
[1] Department of Chemical Engineering, Hiroshima University | |
关键词: Fluid Mechanics; Pulsatile Flow; Wavy Channel; Unsteady Separation; Finite Element Method; Flow Visualization; | |
DOI : 10.1252/jcej.20.479 | |
来源: Maruzen Company Ltd | |
【 摘 要 】
References(6)Cited-By(16)A numerical analysis of pulsatile flow in a wavy channel with periodically converging-diverging cross sections was carried out by the finite element method. The variations of streamline and wall shear stress with Womersley number A*, Reynolds number Re and oscillatory fraction of the flow rate P were studied. A recirculation vortex occurs within the furrow of the wall during the acceleration phase for inertia-dominated flow but during the deceleration phase for viscosity-dominated flow. Its boundary is determined in terms of A*2/Re. As Re or P increases, higher modes appear in the time variation of wall shear stress owing to the non-linear effects, and also a kind of Reynolds stress occurs in the time-averaged wall shear stress. An experimental flow visualization study additionally performed shows good agreement with the numerical analysis.
【 授权许可】
Unknown
【 预 览 】
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RO201912080692817ZK.pdf | 926KB | download |