Numerical curved artery model relates blood entrance conditions to evolution of vortices

Scilight ◽  
2021 ◽  
Vol 2021 (44) ◽  
pp. 441107
Author(s):  
Adam Liebendorfer
Keyword(s):  
Curved Artery

Vortices in a curved artery linked to heart disease

Scilight ◽  
2020 ◽  
Vol 2020 (1) ◽  
pp. 011102
Author(s):  
Savannah Mandel
Keyword(s):  
Heart Disease ◽  
Curved Artery

Application of Genetic Algorithm to Prediction of Artery Geometry

2007 ◽  
Author(s):  
M. Himeno ◽  
S. Noda ◽  
R. Himeno ◽  
K. Fukasaku
Keyword(s):  
Fluid Dynamics ◽  
Genetic Algorithm ◽  
Fluid Dynamic ◽  
Flow Analysis ◽  
Two Dimensional ◽  
Multi Objective Optimization ◽  
Curved Artery ◽  
Two Factors ◽  
Blood Flow Analysis ◽  
Significant Factors

We used the genetic algorithm (GA) and two-dimensional blood flow analysis to examine the fluid dynamic and engineering factors in multi-objective optimization of blood tubes (vessels). We supposed two factors from fluid dynamics: the wall shear stress (WSS) and the pressure loss, and one materials saving factor: the artery length. As a result, we could get the optimum shapes for each factor. In the case of WSS and artery length, both smoothly curved artery shapes and shapes with bulges were obtained as lower WSS cases. The shapes with bulges were similar to those of aneurysms. In this case, it was found that the WSS increases after the bulge is removed. This means bulges in artery vessel areas with higher WSSs effectively reduce the WSS value. Only the case of WSS and artery length produced a shape like an aneurysm. These results indicate that WSS and artery length are significant factors in determining artery shape.

Three-dimensional vortical structures and wall shear stress in a curved artery model

2019 ◽  
Vol 31 (12) ◽  
pp. 121903 ◽  
Author(s):  
Christopher Cox ◽  
Mohammad Reza Najjari ◽  
Michael W. Plesniak
Keyword(s):  
Shear Stress ◽  
Wall Shear Stress ◽  
Three Dimensional ◽  
Vortical Structures ◽  
Curved Artery ◽  
Wall Shear

NUMERICAL ANALYSIS OF THE IMPACT OF ATHEROSCLEROTIC PLAQUE AND DIFFERENT STENT SPACING ON DRUG DEPOSITION

2015 ◽  
Vol 15 (01) ◽  
pp. 1550011
Author(s):  
DONG RUIQI ◽  
JIANG WENTAO ◽  
YAN FEI ◽  
ZHENG TINGHUI ◽  
FAN YUBO
Keyword(s):  
Diffusion Coefficient ◽  
Atherosclerotic Plaque ◽  
Drug Concentration ◽  
Diffusion Coefficients ◽  
Drug Eluting Stent ◽  
Artery Wall ◽  
Obvious Effect ◽  
Drug Deposition ◽  
Curved Artery ◽  
The Impact

Objectives: To investigate the influence of atherosclerotic plaque and different drug-eluting stent (DES) spacing on drug deposition in the curved artery wall. Methods: Based on the computational fluid dynamics (CFD) method, the numerical investigation on distributions of drug concentration in the artery wall was carried out considering three different interstrut distances and five values of the plaque diffusion coefficients. The results were compared with those of the model without plaque. Results: Under the same stent spacing, drug deposition weakly increased with the increasing plaque diffusion coefficient. When the same diffusion coefficient value was taken, drug deposition presented steady growth with the expansion of stent spacing. When the stent spacing was of 1-strut length or the diffusion coefficient of plaque was much smaller than the diffusion coefficient of tissue (an order of magnitude or more), the drug deposition would be evidently reduced. Conclusions: In a curved artery, the stent spacing is still an important factor in drug deposition. The diffusion coefficients of plaque have little influence on the average drug concentration, but they show a relatively obvious effect on drug distributions.

Numerical Evaluation of Stenosis Location Effects on Hemodynamics and Shear Stress Through Curved Artery

2014 ◽  
Vol 4 (5) ◽  
pp. 358-366 ◽  
Author(s):  
Ebrahim Barati ◽  
Mahdi Halabian ◽  
Alireza Karimi ◽  
Mahdi Navidbakhsh
Keyword(s):  
Shear Stress ◽  
Numerical Evaluation ◽  
Curved Artery
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