An investigation on the effects of chamber wall's elasticity on blood flow in a LVAD pump

Chan, ENK; Huynh, P; Nguyen, TT

An investigation on the effects of chamber wall's elasticity on blood flow in a LVAD pump

Chan, ENK Huynh, P

Nguyen, TT

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Publication Type:: Conference Proceeding
Citation:: Proceedings of the 19th Australasian Fluid Mechanics Conference, AFMC 2014, 2014
Issue Date:: 2014-01-01

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Field	Value	Language
dc.contributor.author	Chan, ENK	en_US
dc.contributor.author	Huynh, P https://orcid.org/0000-0002-8786-8472	en_US
dc.contributor.author	Nguyen, TT	en_US
dc.date.issued	2014-01-01	en_US
dc.identifier.citation	Proceedings of the 19th Australasian Fluid Mechanics Conference, AFMC 2014, 2014	en_US
dc.identifier.isbn	9780646596952	en_US
dc.identifier.uri	http://hdl.handle.net/10453/33464
dc.description.abstract	Left Ventricular Assist Device (LVAD) is a pump that is designed to provide life support to patients with end stage heart failure. In an effort to ensure the safety of LVAD, the pumping mechanics must not exert excessive stress on the blood or hemolysis would occur. This study investigates the effects of chamber wall's elasticity (isotropic) from common materials on blood flow in a LVAD, especially the shear stress resulted therein. The materials considered are titanium, diamond-like carbon (DLC), 2-methacryloyloxy ethyl phosphorylcholine (MPC) polymer, segmented polyurethane (SPU), polyurethane (PEU), and a material with properties corresponding to blood vessels, which is used as the reference. The study employs a Fluid Structure Interaction (FSI) simulation software suite to couple Computational Fluid Dynamics (CFD) with mechanical simulation (ANSYS). The test system is a centrifugal pump based on a 2012-Jarvik Patent. The flow through the pump is driven by an impeller rotating at set speed to achieve a pre-set blood flowrate. The results show that there is no significant difference in turbulent dissipation rate among the different chamber-wall materials, with PEU giving closest figure to the blood vessels'. On the other hand, regarding wall shear stress which is an important factor in hemolysis, titanium, DLC and SPU result in similar maximum values, whereas MPC, PEU and blood vessel material give noticeably lower ones.	en_US
dc.relation.ispartof	Proceedings of the 19th Australasian Fluid Mechanics Conference, AFMC 2014	en_US
dc.title	An investigation on the effects of chamber wall's elasticity on blood flow in a LVAD pump	en_US
dc.type	Conference Proceeding
utslib.for	0904 Chemical Engineering	en_US
dc.location.activity	Melbourne, Australia
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
utslib.copyright.status	open_access
pubs.publication-status	Published	en_US

Abstract:

Left Ventricular Assist Device (LVAD) is a pump that is designed to provide life support to patients with end stage heart failure. In an effort to ensure the safety of LVAD, the pumping mechanics must not exert excessive stress on the blood or hemolysis would occur. This study investigates the effects of chamber wall's elasticity (isotropic) from common materials on blood flow in a LVAD, especially the shear stress resulted therein. The materials considered are titanium, diamond-like carbon (DLC), 2-methacryloyloxy ethyl phosphorylcholine (MPC) polymer, segmented polyurethane (SPU), polyurethane (PEU), and a material with properties corresponding to blood vessels, which is used as the reference. The study employs a Fluid Structure Interaction (FSI) simulation software suite to couple Computational Fluid Dynamics (CFD) with mechanical simulation (ANSYS). The test system is a centrifugal pump based on a 2012-Jarvik Patent. The flow through the pump is driven by an impeller rotating at set speed to achieve a pre-set blood flowrate. The results show that there is no significant difference in turbulent dissipation rate among the different chamber-wall materials, with PEU giving closest figure to the blood vessels'. On the other hand, regarding wall shear stress which is an important factor in hemolysis, titanium, DLC and SPU result in similar maximum values, whereas MPC, PEU and blood vessel material give noticeably lower ones.

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http://hdl.handle.net/10453/33464