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Numerical prediction of flow in a model of a (potential) soft acting peristaltic blood pump
Author(s) -
Natarajan S.,
MokhtarzadehDehghan M. R.
Publication year - 2000
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/(sici)1097-0363(20000330)32:6<711::aid-fld992>3.0.co;2-k
Subject(s) - mechanics , pulsatile flow , laminar flow , shear stress , finite element method , flow (mathematics) , head (geology) , peristaltic pump , axial piston pump , boundary value problem , engineering , physics , computational fluid dynamics , mechanical engineering , mathematics , structural engineering , geology , mathematical analysis , geomorphology , cardiology , medicine
This paper presents a numerical study of the flow field in a novel ‘soft’ acting peristaltic pump. The pump has potential applications wherever pumping of biological or sensitive fluids with reduced damage is required. The application of the device presented is as a blood pump. The model of the pump comprises a cylindrical tube that forms three chambers. The walls of these chambers move radially as a function of time. The pumping action is initiated by applying phased movement between the chambers. The flow is treated as laminar, unsteady, incompressible, Newtonian, and with a moving boundary. The governing equations are solved using a finite element method (FEM). An operating speed of 60 cycle min −1 has been chosen. The results show that a periodic solution can be achieved after four cycles. The velocity field, streamline and shear stress are presented and discussed. The flow has generally a two‐way pulsatile nature, moving forwards and backwards. However, at the outlet, there is a net outflow over one cycle against a zero pressure head. Net flow linearly decreases to zero with increasing pressure head. Copyright © 2000 John Wiley & Sons, Ltd.