Unsteady Non-Newtonian Solver on Unstructured Grid for the Simulation of Blood Flow
Joint Authors
Li, Guojie
Zhou, Gaoling
Chen, Bin
Source
Advances in Mechanical Engineering
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-07-15
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
Blood is in fact a suspension of different cells with yield stress, shear thinning, and viscoelastic properties, which can be represented by different non-Newtonian models.
Taking Casson fluid as an example, an unsteady solver on unstructured grid for non-Newtonian fluid is developed to simulate transient blood flow in complex flow region.
In this paper, a steady solver for Newtonian fluid is firstly developed with the discretization of convective flux, diffusion flux, and source term on unstructured grid.
For the non-Newtonian characteristics of blood, the Casson fluid is approximated by the Papanastasiou's model and treated as Newtonian fluid with variable viscosity.
Then considering the transient property of blood flow, an unsteady non-Newtonian solver based on unstructured grid is developed by introducing the temporal term by first-order upwind difference scheme.
Using the proposed solver, the blood flows in carotid bifurcation of hypertensive patients and healthy people are simulated.
The result shows that the possibility of the genesis and development of atherosclerosis is increased, because of the increase in incoming flow shock and backflow areas of the hypertensive patients, whose WSS was 20~87.1% lower in outer vascular wall near the bifurcation than that of the normal persons and 3.7~5.5% lower in inner vascular wall downstream the bifurcation.
American Psychological Association (APA)
Li, Guojie& Chen, Bin& Zhou, Gaoling. 2013. Unsteady Non-Newtonian Solver on Unstructured Grid for the Simulation of Blood Flow. Advances in Mechanical Engineering،Vol. 2013, no. 2013, pp.1-13.
https://search.emarefa.net/detail/BIM-483780
Modern Language Association (MLA)
Li, Guojie…[et al.]. Unsteady Non-Newtonian Solver on Unstructured Grid for the Simulation of Blood Flow. Advances in Mechanical Engineering No. 2013 (2013), pp.1-13.
https://search.emarefa.net/detail/BIM-483780
American Medical Association (AMA)
Li, Guojie& Chen, Bin& Zhou, Gaoling. Unsteady Non-Newtonian Solver on Unstructured Grid for the Simulation of Blood Flow. Advances in Mechanical Engineering. 2013. Vol. 2013, no. 2013, pp.1-13.
https://search.emarefa.net/detail/BIM-483780
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-483780