On the modelling of steady generalized Newtonian flows in a 3D coronary bypass

Title:

On the modelling of steady generalized Newtonian flows in a 3D coronary bypass

Creator:

Vimmr, Jan and Jonášová, Alena

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:d960b4f9-7251-44ab-90b1-07f17817a672
uuid:d960b4f9-7251-44ab-90b1-07f17817a672

Subject:

coronary occluded artery, bypass model, non-Newtonian flow, Carreau-Yasuda model, Cross model, FVM, and instructured hexahedral grid

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Blood's non-Newtonian behaviour is investigated in an idealized coronary 3D bypass model, which includes both the proximal and distal parts of the occluded native artery and the connected end-to- side bypass graft. Considering the blood to be a generalized Newtonian fluid, the shear-dependent viscosity is given by two well-known macroscopic non-Newtonian models (the Carrea-Yasuda model and the modified Cross model). Both non-Newtonian steady flow fields are analyzed with regard to the bypass geometry and are compared with the case of the Newtonian fluid. In order to perform all numerical simulations, we developed an incompressible Navier.Stokes solver based on the pseudo-compressibility approach and on the cell-centred finite volume formulation of the central explicit fourth-stage Runge-Kutta time stepping scheme defined on unstructured hexahedral computational grid. and Obsahuje seznam literatury

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

193-203

Source:

Engineering mechanics: international journal for theoretical and applied mechanics | 2008 Volume:15 | Number:3

Harvested from:

CDK

Metadata only:

false