Numerical Study of Pulsatile Flow Through Models of Vascular Stenoses with PhysiologicalWaveform of the Heart

2010 ◽  
pp. 357-368
Author(s):  
Jason D. Thompson ◽  
Christian F. Pinzn ◽  
Ramesh K. Agarwal
Keyword(s):  
Pulsatile Flow ◽  
Numerical Study ◽  
Flow Through

Numerical Study of Pulsatile Flow through a Wavy Channel. Vortex Dynamics and Fluid Mixing.

1996 ◽  
Vol 62 (604) ◽  
pp. 4020-4025
Author(s):  
Tatsuo NISHIMURA ◽  
Kenji MATSUBAYASHI ◽  
Koji KUNITSUGU ◽  
Naoki OKA
Keyword(s):  
Vortex Dynamics ◽  
Pulsatile Flow ◽  
Numerical Study ◽  
Fluid Mixing ◽  
Wavy Channel ◽  
Flow Through

Direct numerical simulations of transitional pulsatile flow through a constriction

2007 ◽  
Vol 587 ◽  
pp. 425-451 ◽  
Author(s):  
N. BERATLIS ◽  
E. BALARAS ◽  
K. KIGER
Keyword(s):  
Pulsatile Flow ◽  
Numerical Study ◽  
Wall Layer ◽  
Energy Budgets ◽  
Streamwise Vortices ◽  
Maximum Value ◽  
Turbulent Statistics ◽  
Flow Through ◽  
Shedding Frequency ◽  
The One

A combined experimental and numerical study of transitional pulsatile flow through a planar constriction is presented. The parametric space that we adopt is similar to the one reported in a variety of past experiments relevant to the flow through stenosed arteries. In general, the flow just downstream of the constriction is dominated by the dynamic of the accelerating/decelerating jet that forms during each pulsatile cycle. We found a switch in the shedding frequency and roll-up dynamics, just after the flow rate approaches its maximum value in the cycle. The flow in the reattached area further downstream is also affected by the jet dynamics. A ‘synthetic’ turbulent-like wall-layer develops, an is constantly supported by streamwise vortices that originate from the spanwise instabilities of the large coherent structures generated by the jet. The relation of these structures to the phase-averaged turbulent statistics and the turbulent kinetic energy budgets is discussed.

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