Numerical simulations of an incompressible piezoviscous fluid flowing in a plane slider bearing

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10376631" target="_blank" >RIV/00216208:11320/18:10376631 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1007/s11012-017-0731-0" target="_blank" >https://doi.org/10.1007/s11012-017-0731-0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11012-017-0731-0" target="_blank" >10.1007/s11012-017-0731-0</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Numerical simulations of an incompressible piezoviscous fluid flowing in a plane slider bearing

Popis výsledku v původním jazyce

We provide numerical simulations of an incompressible pressure-thickening and shear-thinning lubricant flowing in a plane slider bearing. We study the influence of several parameters, namely the ratio of the characteristic lengths (with representing the Reynolds lubrication approximation); the coefficient of the exponential pressure-viscosity relation ; the parameter related to the Carreau-Yasuda shear-thinning model and the modified Reynolds number . The finite element approximations to the steady isothermal flows are computed without resorting to the lubrication approximation. We obtain the numerical solutions as long as the variation of the viscous stress with the pressure is limited, say . We show conclusively that the existing practice of avoiding the numerical difficulties by cutting the viscosity off for large pressures leads to results that depend sorely on the artificial cut-off parameter. We observe that the piezoviscous rheology generates pressure differences across the fluid film.

Název v anglickém jazyce

Numerical simulations of an incompressible piezoviscous fluid flowing in a plane slider bearing

Popis výsledku anglicky

We provide numerical simulations of an incompressible pressure-thickening and shear-thinning lubricant flowing in a plane slider bearing. We study the influence of several parameters, namely the ratio of the characteristic lengths (with representing the Reynolds lubrication approximation); the coefficient of the exponential pressure-viscosity relation ; the parameter related to the Carreau-Yasuda shear-thinning model and the modified Reynolds number . The finite element approximations to the steady isothermal flows are computed without resorting to the lubrication approximation. We obtain the numerical solutions as long as the variation of the viscous stress with the pressure is limited, say . We show conclusively that the existing practice of avoiding the numerical difficulties by cutting the viscosity off for large pressures leads to results that depend sorely on the artificial cut-off parameter. We observe that the piezoviscous rheology generates pressure differences across the fluid film.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10102 - Applied mathematics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Meccanica

ISSN

0025-6455

e-ISSN

—

Svazek periodika

53

Číslo periodika v rámci svazku

1-2

Stát vydavatele periodika

IT - Italská republika

Počet stran výsledku

20

Strana od-do

209-228

Kód UT WoS článku

000424460100014

EID výsledku v databázi Scopus

2-s2.0-85028975424