Numerical study of turbulent blood flow through a caged-ball prosthetic heart valve using a boundary-fitted co-ordinate system

1987 ◽  
Vol 25 (2) ◽  
pp. 173-180 ◽  
Author(s):  
K. Thalassoudis ◽  
J. Mazumdar ◽  
B. J. Noye ◽  
I. H. Craig
Keyword(s):  
Blood Flow ◽  
Heart Valve ◽  
Numerical Study ◽  
Prosthetic Heart Valve ◽  
Flow Through

Numerical Study of the Steady Axisymmetric Flow Through a Disk-Type Prosthetic Heart Valve in a Constant Diameter Chamber

1977 ◽  
Vol 99 (2) ◽  
pp. 91-97 ◽  
Author(s):  
F. N. Underwood ◽  
T. J. Mueller
Keyword(s):  
Shear Stress ◽  
Heart Valve ◽  
Numerical Solutions ◽  
Numerical Study ◽  
Reverse Flow ◽  
Axisymmetric Flow ◽  
Prosthetic Heart Valve ◽  
High Shear ◽  
Flow Through ◽  
Very High

Numerical solutions for the steady axisymmetric flow through a disk-type prosthetic heart valve were obtained for Reynolds numbers from 20 to 1300. Stream function, vorticity, and shear and normal stress plots are presented. Comparison of the length of the separated flow region downstream of the disk with experimental data shows good agreement through Reynolds number 500. The maximum value of the shear stress occurred on the upstream corner of the disk. These detailed results clearly identify regions of very high shear and normal stresses (erythrocyte deformation or damage), regions of very low or very high shear stress at walls (atheromatous lesions), and the extent of separated or reverse flow regions (thrombosis).

Numerical Study of the Steady Axisymmetric Flow Through a Disk-Type Prosthetic Heart Valve in an Aortic-Shaped Chamber

1979 ◽  
Vol 101 (3) ◽  
pp. 198-204 ◽  
Author(s):  
F. N. Underwood ◽  
T. J. Mueller
Keyword(s):  
Shear Stress ◽  
Heart Valve ◽  
Stream Function ◽  
Numerical Solutions ◽  
Numerical Study ◽  
Axisymmetric Flow ◽  
Prosthetic Heart Valve ◽  
High Shear ◽  
Flow Through ◽  
Very High

Numerical solutions for the steady axisymmetric flow through a disk-type prosthetic heart valve were obtained for Reynolds numbers from 50 to 600. A nonuniform mesh in both directions was used and the finite difference equations in vorticity and stream function were solved explicitly. Stream function, vorticity, and shear and normal stress plots are presented. These detailed results clearly identify regions of very high shear and normal stresses, regions of very low or very high shear stress at the walls and the extent of separated or reverse flow regions. The length of the separated flow region downstream of the disk agreed very well with experimental data. The maximum value of the shear stress occurred on the upstream corner of the disk.

scholarly journals Numerical Study of Blood Flow Through Artificial Heart Valves

2021 ◽  
Vol 1094 (1) ◽  
pp. 012120
Author(s):  
Hussein Togun ◽  
Ali Abdul Hussain ◽  
Saja Ahmed ◽  
Iman Abdul hussain ◽  
Huda Shaker
Keyword(s):  
Blood Flow ◽  
Artificial Heart ◽  
Heart Valves ◽  
Numerical Study ◽  
Artificial Heart Valves ◽  
Flow Through

scholarly journals Effect of exercise on blood flow through the aortic valve: a combined clinical and numerical study

2013 ◽  
Vol 17 (16) ◽  
pp. 1821-1834 ◽  
Author(s):  
Hamidreza Ghasemi Bahraseman ◽  
Kamran Hassani ◽  
Mahdi Navidbakhsh ◽  
Daniel M. Espino ◽  
Zahra Alizadeh Sani ◽  
...  
Keyword(s):  
Blood Flow ◽  
Aortic Valve ◽  
Numerical Study ◽  
Flow Through

scholarly journals Numerical Study on Three-Dimensional Unsteady Blood Flow through an Artery with a Small Side Branch.

1999 ◽  
Vol 42 (3) ◽  
pp. 673-679 ◽  
Author(s):  
Masahide NAKAMURA ◽  
Toshinori EBA ◽  
Margot R. ROACH ◽  
Ralph G. KRATKY ◽  
Masahiro OTOMO
Keyword(s):  
Blood Flow ◽  
Numerical Study ◽  
Three Dimensional ◽  
Side Branch ◽  
Flow Through ◽  
Unsteady Blood Flow ◽  
Small Side
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