Conference Papers

Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506

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    Numerical Analysis of Wall Shear Stress Parameters of Newtonian Pulsatile Blood Flow Through Coronary Artery and Correlation to Atherosclerosis
    (Springer Science and Business Media Deutschland GmbH, 2020) Buradi, A.; Mahalingam, A.
    The formation of atherosclerosis mainly depends on local hemodynamic blood flow parameters. The spatial and temporal variation of hemodynamic blood flow parameter is considered as an important factor for atherogenesis. The laminar, Newtonian pulsatile blood flow is considered for hemodynamic analysis of the idealized non-stenosis human coronary artery. To model and study the relationship between relative residence time (RRT), time-averaged wall shear stress (WSS) vector (TAWSSV), oscillatory shear index (OSI), and time-averaged WSS (TAWSS) the computational fluid dynamics technique are used. The study shows that higher OSI values are predicted at lower TAWSS and TAWSSV. At the low TAWSS areas the RRT attains a higher value, the region with high RRT correlates with atherosclerotic lesions on the artery wall. The local differences between RRT, OSI, and WSS magnitude may help to find predominantly where the atherosclerotic lesion progresses and develops at specific locations of the artery. © 2020, Springer Nature Singapore Pte Ltd.
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    Effect of Induced Helicity on the Hemodynamics of Carotid Artery Passage
    (Springer Science and Business Media Deutschland GmbH, 2024) Rakesh, L.; Kadali, A.; Prakashini, K.; Anish, S.
    Abrupt narrowing of the carotid artery known as atherosclerosis is a common cardiovascular disease, increasing the risk of stroke which is one of the leading causes of death. Helicity in the arterial passage is found to be one of the effective ways to minimize plaque formation. Using Autodesk Meshmixer, an open-source software, the stenosed portion of the diseased artery is removed to obtain what is referred to in this study as the base case. The helicity and hemodynamic characteristics of a patient-specific geometry with and without stent in repaired instance are examined. The current study found that when novel stent design is placed there is a reduction in recirculation zone size and Relative Residence Time (RRT), but also resulted in increased pressure drop across the artery. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.