Numerical analysis of fluid flow in a multiple disk pump for use as an artificial ventricle /
The objective of this study is to determine the velocity and pressure profiles and to develop a better understanding of the flow pattern between the disks to improve a multiple disk pump design for use as an artificial heart device. The pump consists of multiple thin smooth polycarbonate disks with...
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| Format: | Thesis Book |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
1996.
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| Subjects: | |
| Online Access: | http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=739668211&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | The objective of this study is to determine the velocity and pressure profiles and to develop a better understanding of the flow pattern between the disks to improve a multiple disk pump design for use as an artificial heart device. The pump consists of multiple thin smooth polycarbonate disks with openings in the center within a spiral volute chamber. The inner and outer diameters of the disk are 1.5 and 3.0 inches respectively. The spacing between each disk can be varied according to the number of disks. The fluid employed is assumed to have the density and viscosity analogous to blood. The volumetric flow rate is regarded as 5 liter / minute similar to human cardiac output. In a disk pump, fluid enters along the axis of the pump rotor through the openings, and proceeds radially into the spaces between the disks. Because it is assumed that the flow in all disk spaces within the multiple disk pump is similar, the viscous flow of an incompressible fluid between a single pair of parallel disks is investigated. The viscous flow of an incompressible Newtonian fluid between the disks is described by the Navier-Stokes equations and the equation of continuity as the flow governing equations. Since the Navier-Stokes equations are nonlinear partial differential equations which cannot be solved analytically, the flow governing equations are solved numerically using Algor, a commercial finite element based numerical analysis package. The model is constructed by setting up a finite element mesh in the flow domain. The two dimensional quadrilateral elements are employed for the numerical simulation of the flow governing equations. In this analysis, the gap width between each disk is used as a parameter for the numerical solution. The velocity profiles are obtained for both two-dimensional steady and sinusoidal flows. The pressures are calculated from the computed velocity field using the penalty function statement. |
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| Item Description: | Vita. "Major Subject: Bioengineering". |
| Physical Description: | xi, 101 leaves : illustrations ; 28 cm. Issued also on microfiche from University Microfilms Inc. |
| Bibliography: | Includes bibliographical references: pages 96-100. |