Analysis of the Shear-Thinning viscosity behavior of the Johnson-Segalman viscoelastic fluids

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985840%3A_____%2F22%3A00556906" target="_blank" >RIV/67985840:_____/22:00556906 - isvavai.cz</a>

Alternative codes found

RIV/68407700:21220/22:00356598

Result on the web

<a href="https://doi.org/10.3390/fluids7010036" target="_blank" >https://doi.org/10.3390/fluids7010036</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/fluids7010036" target="_blank" >10.3390/fluids7010036</a>

Result language

angličtina

Original language name

Analysis of the Shear-Thinning viscosity behavior of the Johnson-Segalman viscoelastic fluids

Original language description

This paper presents a numerical comparison of viscoelastic shear-thinning fluid flow using a generalized Oldroyd-B model and Johnson-Segalman model under various settings. Results for the standard shear-thinning generalization of Oldroyd-B model are used as a reference for comparison with those obtained for the same flow cases using Johnson-Segalman model that has specific adjustment of convected derivative to assure shear-thinning behavior. The modeling strategy is first briefly described, pointing out the main differences between the generalized Oldroyd-B model (using the Cross model for shear-thinning viscosity) and the Johnson-Segalman model operating in shear-thinning regime. Then, both models are used for blood flow simulation in an idealized stenosed axisymmetric vessel under different flow rates for various model parameters. The simulations are performed using an in-house numerical code based on finite-volume discretization. The obtained results are mutually compared and discussed in detail, focusing on the qualitative assessment of the most distinct flow field differences. It is shown that despite all models sharing the same asymptotic viscosities, the behavior of the Johnson-Segalman model can be (depending on flow regime) quite different from the predictions of the generalized Oldroyd-B model.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10101 - Pure mathematics

Project

<a href="/en/project/GA19-04243S" target="_blank" >GA19-04243S: Partial differential equations in mechanics and thermodynamics of fluids</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Fluids

ISSN

2311-5521

e-ISSN

2311-5521

Volume of the periodical

7

Issue of the periodical within the volume

1

Country of publishing house

CH - SWITZERLAND

Number of pages

24

Pages from-to

36

UT code for WoS article

000758496900001

EID of the result in the Scopus database

2-s2.0-85123623044