Analysis of pulsatile blood flow in constricted bifurcated arteries with vorticity-stream function approach.
This theoretical investigation deals with an analysis of pulsatile blood flow in a model bifurcated artery having a stenosis in the parent arterial lumen. The geometry of the bifurcated arterial segment with an implanted stenosis in the parent duct is given an appropriate mathematical shape with the...
| Publicado en: | Journal of Medical Engineering & Technology Vol. 32; no. 1; pp. 10 - 23 |
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| Autores principales: | , |
| Formato: | Journal Article |
| Publicado: |
Taylor & Francis Ltd
Jan/Feb2008
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=105678387&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 105678387 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 03091902 B9Q jtl: Journal of Medical Engineering & Technology issn: 03091902 maglogo: Y pubinfo: dt: Jan/Feb2008 vid: 32 iid: 1 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 105678387 2010066496 NLM18183516 105678387 ppf: 10 ppct: 13 formats: tig: atl: Analysis of pulsatile blood flow in constricted bifurcated arteries with vorticity-stream function approach. aug: au: Chakravarty S Sen S affil: Department of Mathematics, Visva-Bharati University, Santiniketan, India. santabrata2004@yahoo.co.in sug: subj: Arteries Physiology Computer Simulation Models, Biological Physics Algorithms Animals Arteries Physiopathology Arteriosclerosis Physiopathology Blood Flow Velocity Stress, Mechanical ab: This theoretical investigation deals with an analysis of pulsatile blood flow in a model bifurcated artery having a stenosis in the parent arterial lumen. The geometry of the bifurcated arterial segment with an implanted stenosis in the parent duct is given an appropriate mathematical shape with the introduction of suitable curvature at the lateral junction and the flow divider. The vascular wall deformability is duly accounted for although the development of atherosclerosis in the arteries reduces its elastic property to some extent. The streaming blood contained in the bifurcated artery is treated to be Newtonian. The flow dynamic analysis applies two-dimensional unsteady incompressible nonlinear Navier-Stokes equations rewritten in the vorticity-stream function formulation. Following a radial coordinate transformation, these equations are solved numerically by a finite difference scheme with the approximate choice of the inlet and boundary conditions in concert with the biophysical point of view. The final numerical results are highlighted at the end of the paper through the exhibition of the wall shear stress and several time-variant patterns of streamlines and vorticity contours of the flow phenomena, which are highly influenced by the severity of the stenosis and the angle of bifurcation. The applicability of the present model is thus established. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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