Authors:
Mohammed G. Al-Azawy
1
;
A. Turan
2
and
A. Revell
2
Affiliations:
1
The University of Manchester and Wasit University, United Kingdom
;
2
The University of Manchester, United Kingdom
Keyword(s):
Computational Fluid Dynamics (Cfd), Left Ventricular Assist Device (Lvad), Overset Mesh, Non-Newtonian Flow, Turbulence Modelling.
Related
Ontology
Subjects/Areas/Topics:
Biomechanical Devices
;
Biomedical Engineering
;
Biomedical Instruments and Devices
Abstract:
A comprehensive Computational Fluid Dynamics (CFD) simulation of transient, non-Newtonian, and turbulent blood flow through a positive displacement pump, left ventricular assist device (LVAD), is executed. Non-Newtonian blood flow is conducted to investigate the flow through a pulsatile pump LVAD by using common blood viscosity model: Carreau. The numerical results of non-Newtonian fluid with a turbulence model, Elliptic Blending Reynolds Stress Model (EB-RSM) are presented. The computational domain that has been selected is a pulsatile pump, which includes valves and a moving pusher plate. An overset mesh zero gap technique was employed to capture the cyclic motion of pusher plate and valves rotation to mimic the scenario of a natural heart. The use of this technique to rotate the valves and ensure full valve closure presented a good agreement results with the experimental data.