HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Master thesis

Instabilité thermoconvective de Rayleigh-Bénard pour des fluides rhéofluidifiants

Abstract : This study concerns the Rayleigh-Bénard thermoconvective instability for purely viscous shear-thinning fluids, i.e. fluids for which the viscosity decreases non linearly with increasing the shear rate. The aim is to examine the shear-thinning effects on : (i) the nature of the bifurcation, (ii) the intensity of convection and (iii) the viscosity field far from the onset. Two types of boundary conditions are considered at the wall-fluid interface : adhesion and slipping with or without friction. A weakly non linear approach is adopted. The rheological behaviour of the fluid is described by Carreau model. We show that : (i) slipping leads to lower critical Rayleigh numbers and larger convective structures ; (ii) shear-thinning favors a subcritical bifurcation ; (iii) the heat transfer coefficient increases with increasing shear-thinning effects.
Document type :
Master thesis
Complete list of metadata

Cited literature [34 references]  Display  Hide  Download

https://hal.univ-lorraine.fr/hal-01869144
Contributor : Memoires Ul Connect in order to contact the contributor
Submitted on : Thursday, September 6, 2018 - 11:57:08 AM
Last modification on : Saturday, April 30, 2022 - 4:03:07 PM
Long-term archiving on: : Friday, December 7, 2018 - 8:36:33 PM

File

BUS_M_2012_KALCK_AURELIE.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : hal-01869144, version 1

Citation

Aurélie Kalck. Instabilité thermoconvective de Rayleigh-Bénard pour des fluides rhéofluidifiants. Génie des procédés. 2012. ⟨hal-01869144⟩

Share

Metrics

Record views

43

Files downloads

1010