Measurement of Steady-Flow Instability and Turbulence Levels in Dacron Vascular GraftsSource: Journal of Biomechanical Engineering:;1992:;volume( 114 ):;issue: 004::page 521Author:D. G. Shombert
DOI: 10.1115/1.2894105Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Fluid dynamic properties of Dacron vascular grafts were studied under controlled steady-flow conditions over a Reynolds number range of 800 to 4500. Knitted and woven grafts having nominal diameters of 6 mm and 10 mm were studied. Thermal anemometry was used to measure centerline velocity at the downstream end of the graft; pressure drop across the graft was also measured. Transition from laminar flow to turbulent flow was observed, and turbulence intensity and turbulent stresses (Reynolds normal stresses) were measured in the turbulent regime. Knitted grafts were found to have greater pressure drop than the woven grafts, and one sample was found to have a critical Reynolds number (Rc ) of less than one-half the value of Rc for a smooth-walled tube.
keyword(s): Flow (Dynamics) , Turbulence , Reynolds number , Stress , Pressure drop , Laminar flow AND Fluids ,
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contributor author | D. G. Shombert | |
date accessioned | 2017-05-08T23:37:40Z | |
date available | 2017-05-08T23:37:40Z | |
date copyright | November, 1992 | |
date issued | 1992 | |
identifier issn | 0148-0731 | |
identifier other | JBENDY-25891#521_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/109820 | |
description abstract | Fluid dynamic properties of Dacron vascular grafts were studied under controlled steady-flow conditions over a Reynolds number range of 800 to 4500. Knitted and woven grafts having nominal diameters of 6 mm and 10 mm were studied. Thermal anemometry was used to measure centerline velocity at the downstream end of the graft; pressure drop across the graft was also measured. Transition from laminar flow to turbulent flow was observed, and turbulence intensity and turbulent stresses (Reynolds normal stresses) were measured in the turbulent regime. Knitted grafts were found to have greater pressure drop than the woven grafts, and one sample was found to have a critical Reynolds number (Rc ) of less than one-half the value of Rc for a smooth-walled tube. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Measurement of Steady-Flow Instability and Turbulence Levels in Dacron Vascular Grafts | |
type | Journal Paper | |
journal volume | 114 | |
journal issue | 4 | |
journal title | Journal of Biomechanical Engineering | |
identifier doi | 10.1115/1.2894105 | |
journal fristpage | 521 | |
journal lastpage | 526 | |
identifier eissn | 1528-8951 | |
keywords | Flow (Dynamics) | |
keywords | Turbulence | |
keywords | Reynolds number | |
keywords | Stress | |
keywords | Pressure drop | |
keywords | Laminar flow AND Fluids | |
tree | Journal of Biomechanical Engineering:;1992:;volume( 114 ):;issue: 004 | |
contenttype | Fulltext |