Variability of Computational Fluid Dynamics Solutions for Pressure and Flow in a Giant Aneurysm: The ASME 2012 Summer Bioengineering Conference CFD ChallengeSource: Journal of Biomechanical Engineering:;2013:;volume( 135 ):;issue: 002::page 21016Author:Steinman, David A.
,
Hoi, Yiemeng
,
Fahy, Paul
,
Morris, Liam
,
Walsh, Michael T.
,
Aristokleous, Nicolas
,
Anayiotos, Andreas S.
,
Papaharilaou, Yannis
,
Arzani, Amirhossein
,
Shadden, Shawn C.
,
Berg, Philipp
,
Janiga, Gأ،bor
,
Bols, Joris
,
Segers, Patrick
,
Bressloff, Neil W.
,
Cibis, Merih
,
Gijsen, Frank H.
,
Cito, Salvatore
,
Pallarأ©s, Jordi
,
Browne, Leonard D.
,
Costelloe, Jennifer A.
,
Lynch, Adrian G.
,
Degroote, Joris
,
Vierendeels, Jan
,
Fu, Wenyu
,
Qiao, Aike
,
Hodis, Simona
,
Kallmes, David F.
,
Kalsi, Hardeep
,
Long, Quan
,
Kheyfets, Vitaly O.
,
Finol, Ender A.
,
Kono, Kenichi
,
Malek, Adel M.
,
Lauric, Alexandra
,
Menon, Prahlad G.
,
Pekkan, Kerem
,
Esmaily Moghadam, Mahdi
,
Marsden, Alison L.
,
Oshima, Marie
,
Katagiri, Kengo
,
Peiffer, Vأ©ronique
,
Mohamied, Yumnah
,
Sherwin, Spencer J.
,
Schaller, Jens
,
Goubergrits, Leonid
,
Usera, Gabriel
,
Mendina, Mariana
,
Valen
,
Habets, Damiaan F.
,
Xiang, Jianping
,
Meng, Hui
,
Yu, Yue
,
Karniadakis, George E.
,
Shaffer, Nicholas
,
Loth, Francis
DOI: 10.1115/1.4023382Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Stimulated by a recent controversy regarding pressure drops predicted in a giant aneurysm with a proximal stenosis, the present study sought to assess variability in the prediction of pressures and flow by a wide variety of research groups. In phase I, lumen geometry, flow rates, and fluid properties were specified, leaving each research group to choose their solver, discretization, and solution strategies. Variability was assessed by having each group interpolate their results onto a standardized mesh and centerline. For phase II, a physical model of the geometry was constructed, from which pressure and flow rates were measured. Groups repeated their simulations using a geometry reconstructed from a microcomputed tomography (CT) scan of the physical model with the measured flow rates and fluid properties. Phase I results from 25 groups demonstrated remarkable consistency in the pressure patterns, with the majority predicting peak systolic pressure drops within 8% of each other. Aneurysm sac flow patterns were more variable with only a few groups reporting peak systolic flow instabilities owing to their use of high temporal resolutions. Variability for phase II was comparable, and the median predicted pressure drops were within a few millimeters of mercury of the measured values but only after accounting for submillimeter errors in the reconstruction of the lifesized flow model from microCT. In summary, pressure can be predicted with consistency by CFD across a wide range of solvers and solution strategies, but this may not hold true for specific flow patterns or derived quantities. Future challenges are needed and should focus on hemodynamic quantities thought to be of clinical interest.
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contributor author | Steinman, David A. | |
contributor author | Hoi, Yiemeng | |
contributor author | Fahy, Paul | |
contributor author | Morris, Liam | |
contributor author | Walsh, Michael T. | |
contributor author | Aristokleous, Nicolas | |
contributor author | Anayiotos, Andreas S. | |
contributor author | Papaharilaou, Yannis | |
contributor author | Arzani, Amirhossein | |
contributor author | Shadden, Shawn C. | |
contributor author | Berg, Philipp | |
contributor author | Janiga, Gأ،bor | |
contributor author | Bols, Joris | |
contributor author | Segers, Patrick | |
contributor author | Bressloff, Neil W. | |
contributor author | Cibis, Merih | |
contributor author | Gijsen, Frank H. | |
contributor author | Cito, Salvatore | |
contributor author | Pallarأ©s, Jordi | |
contributor author | Browne, Leonard D. | |
contributor author | Costelloe, Jennifer A. | |
contributor author | Lynch, Adrian G. | |
contributor author | Degroote, Joris | |
contributor author | Vierendeels, Jan | |
contributor author | Fu, Wenyu | |
contributor author | Qiao, Aike | |
contributor author | Hodis, Simona | |
contributor author | Kallmes, David F. | |
contributor author | Kalsi, Hardeep | |
contributor author | Long, Quan | |
contributor author | Kheyfets, Vitaly O. | |
contributor author | Finol, Ender A. | |
contributor author | Kono, Kenichi | |
contributor author | Malek, Adel M. | |
contributor author | Lauric, Alexandra | |
contributor author | Menon, Prahlad G. | |
contributor author | Pekkan, Kerem | |
contributor author | Esmaily Moghadam, Mahdi | |
contributor author | Marsden, Alison L. | |
contributor author | Oshima, Marie | |
contributor author | Katagiri, Kengo | |
contributor author | Peiffer, Vأ©ronique | |
contributor author | Mohamied, Yumnah | |
contributor author | Sherwin, Spencer J. | |
contributor author | Schaller, Jens | |
contributor author | Goubergrits, Leonid | |
contributor author | Usera, Gabriel | |
contributor author | Mendina, Mariana | |
contributor author | Valen | |
contributor author | Habets, Damiaan F. | |
contributor author | Xiang, Jianping | |
contributor author | Meng, Hui | |
contributor author | Yu, Yue | |
contributor author | Karniadakis, George E. | |
contributor author | Shaffer, Nicholas | |
contributor author | Loth, Francis | |
date accessioned | 2017-05-09T00:56:31Z | |
date available | 2017-05-09T00:56:31Z | |
date issued | 2013 | |
identifier issn | 0148-0731 | |
identifier other | bio_135_2_021016.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/150993 | |
description abstract | Stimulated by a recent controversy regarding pressure drops predicted in a giant aneurysm with a proximal stenosis, the present study sought to assess variability in the prediction of pressures and flow by a wide variety of research groups. In phase I, lumen geometry, flow rates, and fluid properties were specified, leaving each research group to choose their solver, discretization, and solution strategies. Variability was assessed by having each group interpolate their results onto a standardized mesh and centerline. For phase II, a physical model of the geometry was constructed, from which pressure and flow rates were measured. Groups repeated their simulations using a geometry reconstructed from a microcomputed tomography (CT) scan of the physical model with the measured flow rates and fluid properties. Phase I results from 25 groups demonstrated remarkable consistency in the pressure patterns, with the majority predicting peak systolic pressure drops within 8% of each other. Aneurysm sac flow patterns were more variable with only a few groups reporting peak systolic flow instabilities owing to their use of high temporal resolutions. Variability for phase II was comparable, and the median predicted pressure drops were within a few millimeters of mercury of the measured values but only after accounting for submillimeter errors in the reconstruction of the lifesized flow model from microCT. In summary, pressure can be predicted with consistency by CFD across a wide range of solvers and solution strategies, but this may not hold true for specific flow patterns or derived quantities. Future challenges are needed and should focus on hemodynamic quantities thought to be of clinical interest. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Variability of Computational Fluid Dynamics Solutions for Pressure and Flow in a Giant Aneurysm: The ASME 2012 Summer Bioengineering Conference CFD Challenge | |
type | Journal Paper | |
journal volume | 135 | |
journal issue | 2 | |
journal title | Journal of Biomechanical Engineering | |
identifier doi | 10.1115/1.4023382 | |
journal fristpage | 21016 | |
journal lastpage | 21016 | |
identifier eissn | 1528-8951 | |
tree | Journal of Biomechanical Engineering:;2013:;volume( 135 ):;issue: 002 | |
contenttype | Fulltext |