| Pulsatile non-Newtonian haemodynamics in a 3D bifurcating abdominal aortic aneurysm model. | |
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MedLine Citation:
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PMID: 21229409 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Numerical prediction of non-Newtonian blood flow in a 3D abdominal aortic aneurysm bifurcating model is carried out. The non-Newtonian Carreau model is used to characterise the shear thinning behaviour of the human blood. A physical inlet velocity waveform incorporating a radial velocity distribution reasonably representative of a practical case configuration is employed. Case studies subject to both equal and unequal outlet pressures at iliac bifurcations are presented to display convincingly the downstream pressure influences on the flow behaviour within the aneurysm. Simulations indicate that the non-Newtonian aspects of the blood cannot at all be neglected or given a cursory treatment. The wall shear stress (WSS) is found to change significantly at both the proximal and distal ends of the aneurysm. At the peak systole, the WSS is peak around the bifurcation point, whereas the WSS becomes zero in the bifurcation point. Differential downstream pressure fields display significant effects regarding the flow evolution in the iliac arteries, whereas little or no effects are observed directly on the flow details in the aneurysm. |
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Authors:
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J Ma; A Turan |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-1-01 |
Journal Detail:
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Title: Computer methods in biomechanics and biomedical engineering Volume: - ISSN: 1476-8259 ISO Abbreviation: - Publication Date: 2011 Jan |
Date Detail:
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Created Date: 2011-1-13 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9802899 Medline TA: Comput Methods Biomech Biomed Engin Country: - |
Other Details:
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Languages: ENG Pagination: 1 Citation Subset: - |
Affiliation:
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School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, Manchester, UK. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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