Effect of spatial inlet velocity profiles on the vortex formation pattern in a dilated left ventricle

Despite the advancement of cardiac imaging technologies, these have traditionally been limited to global geometrical measurements. Computational fluid dynamics (CFD) has emerged as a reliable tool that provides flow ?eld information and other variables essential for the assessment of the cardiac fun...

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Main Authors:	Chan, B.T., Lim, E., Ong, C.W., Abu Osman, N.A.
Format:	Article
Published:	Taylor & Francis 2015
Subjects:	T Technology (General) TA Engineering (General). Civil engineering (General)
Online Access:	http://www.tandfonline.com/doi/abs/10.1080/10255842.2013.779683 http://www.tandfonline.com/doi/abs/10.1080/10255842.2013.779683 http://eprints.um.edu.my/13825/1/Effect_of_spatial_inlet_velocity_profiles_on_the_vortex_formation.pdf

id	um-13825
recordtype	eprints
spelling	um-138252015-07-29T03:18:23Z Effect of spatial inlet velocity profiles on the vortex formation pattern in a dilated left ventricle Chan, B.T. Lim, E. Ong, C.W. Abu Osman, N.A. T Technology (General) TA Engineering (General). Civil engineering (General) Despite the advancement of cardiac imaging technologies, these have traditionally been limited to global geometrical measurements. Computational fluid dynamics (CFD) has emerged as a reliable tool that provides flow ?eld information and other variables essential for the assessment of the cardiac function. Extensive studies have shown that vortex formation and propagation during the filling phase acts as a promising indicator for the diagnosis of the cardiac health condition. Proper setting of the boundary conditions is crucial in a CFD study as they are important determinants, that affect the simulation results. In this article, the effect of different transmitral velocity profiles (parabolic and uniform profile) on the vortex formation patterns during diastole was studied in a ventricle with dilated cardiomyopathy (DCM). The resulting vortex evolution pattern using the uniform inlet velocity profile agreed with that reported in the literature, which revealed an increase in thrombus risk in a ventricle with DCM. However the application of a parabolic velocity profile at the inlet yields a deviated vortical flow pattern and overestimates the propagation velocity of the vortex ring towards the apex of the ventricle. This study highlighted that uniform inlet velocity profile should be applied in the study of the filling dynamics in a left ventricle because it produces results closer to that observed experimentally. Taylor & Francis 2015-01-02 Article PeerReviewed application/pdf http://eprints.um.edu.my/13825/1/Effect_of_spatial_inlet_velocity_profiles_on_the_vortex_formation.pdf http://www.tandfonline.com/doi/abs/10.1080/10255842.2013.779683 Chan, B.T.; Lim, E.; Ong, C.W.; Abu Osman, N.A. (2015) Effect of spatial inlet velocity profiles on the vortex formation pattern in a dilated left ventricle. Computer Methods in Biomechanics and Biomedical Engineering <http://eprints.um.edu.my/view/publication/Computer_Methods_in_Biomechanics_and_Biomedical_Engineering.html>, 18 (1). pp. 90-96. ISSN 1025-5842 http://eprints.um.edu.my/13825/
repository_type	Digital Repository
institution_category	Local University
institution	University Malaya
building	UM Research Repository
collection	Online Access
topic	T Technology (General) TA Engineering (General). Civil engineering (General)
spellingShingle	T Technology (General) TA Engineering (General). Civil engineering (General) Chan, B.T. Lim, E. Ong, C.W. Abu Osman, N.A. Effect of spatial inlet velocity profiles on the vortex formation pattern in a dilated left ventricle
description	Despite the advancement of cardiac imaging technologies, these have traditionally been limited to global geometrical measurements. Computational fluid dynamics (CFD) has emerged as a reliable tool that provides flow ?eld information and other variables essential for the assessment of the cardiac function. Extensive studies have shown that vortex formation and propagation during the filling phase acts as a promising indicator for the diagnosis of the cardiac health condition. Proper setting of the boundary conditions is crucial in a CFD study as they are important determinants, that affect the simulation results. In this article, the effect of different transmitral velocity profiles (parabolic and uniform profile) on the vortex formation patterns during diastole was studied in a ventricle with dilated cardiomyopathy (DCM). The resulting vortex evolution pattern using the uniform inlet velocity profile agreed with that reported in the literature, which revealed an increase in thrombus risk in a ventricle with DCM. However the application of a parabolic velocity profile at the inlet yields a deviated vortical flow pattern and overestimates the propagation velocity of the vortex ring towards the apex of the ventricle. This study highlighted that uniform inlet velocity profile should be applied in the study of the filling dynamics in a left ventricle because it produces results closer to that observed experimentally.
format	Article
author	Chan, B.T. Lim, E. Ong, C.W. Abu Osman, N.A.
author_facet	Chan, B.T. Lim, E. Ong, C.W. Abu Osman, N.A.
author_sort	Chan, B.T.
title	Effect of spatial inlet velocity profiles on the vortex formation pattern in a dilated left ventricle
title_short	Effect of spatial inlet velocity profiles on the vortex formation pattern in a dilated left ventricle
title_full	Effect of spatial inlet velocity profiles on the vortex formation pattern in a dilated left ventricle
title_fullStr	Effect of spatial inlet velocity profiles on the vortex formation pattern in a dilated left ventricle
title_full_unstemmed	Effect of spatial inlet velocity profiles on the vortex formation pattern in a dilated left ventricle
title_sort	effect of spatial inlet velocity profiles on the vortex formation pattern in a dilated left ventricle
publisher	Taylor & Francis
publishDate	2015
url	http://www.tandfonline.com/doi/abs/10.1080/10255842.2013.779683 http://www.tandfonline.com/doi/abs/10.1080/10255842.2013.779683 http://eprints.um.edu.my/13825/1/Effect_of_spatial_inlet_velocity_profiles_on_the_vortex_formation.pdf
first_indexed	2018-09-06T06:17:50Z
last_indexed	2018-09-06T06:17:50Z
_version_	1610837834349936640

Effect of spatial inlet velocity profiles on the vortex formation pattern in a dilated left ventricle

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