Finite-amplitude Rayleigh–Bénard convection and pattern selection for viscoelastic fluids

Z Li, RE Khayat - Journal of Fluid Mechanics, 2005 - cambridge.org
The influence of inertia and elasticity on the onset and stability of Rayleigh–Bénard thermal
convection is examined for highly elastic polymeric solutions with constant viscosity. These …

Oscillatory convection in viscoelastic DNA suspensions

P Kolodner - Journal of non-newtonian fluid mechanics, 1998 - Elsevier
Recent experiments on the response of individual, long DNA strands to externally-applied
tension and fluid shear suggest that semi-dilute, aqueous suspensions of these molecules …

Rayleigh–Bénard convection in viscoelastic liquid bridges

M Lappa, A Boaro - Journal of Fluid Mechanics, 2020 - cambridge.org
Rayleigh–Bénard convection in a floating zone held by the surface tension between two
supporting disks at different temperatures is considered. Through direct numerical solution …

Effect of time-periodic vertical oscillations of the Rayleigh–Bénard system on nonlinear convection in viscoelastic liquids

PG Siddheshwar, GN Sekhar, G Jayalatha - Journal of non-Newtonian fluid …, 2010 - Elsevier
A study of heat transport in Rayleigh–Bénard convection in viscoelastic liquids with/without
gravity modulation is made using a most minimal representation of Fourier series and a …

Pattern selection in Rayleigh-Bénard convection with nonlinear viscoelastic fluids

X Zheng, F Hagani, M Boutaous, R Knikker, S Xin… - Physical Review …, 2022 - APS
Rayleigh-Bénard convection in a rectangular enclosure of aspect ratio 2: 1 filled by a class
of nonlinear viscoelastic fluids represented by the Phan-Thien–Tanner (PTT) constitutive …

[HTML][HTML] Multicellular states of viscoelastic thermovibrational convection in a square cavity

A Boaro, M Lappa - Physics of Fluids, 2021 - pubs.aip.org
The problem of pure thermovibrational flow in a two-dimensional square cavity containing a
viscoelastic liquid is investigated in the framework of a numerical approach based on the …

The onset of double diffusive convection in a viscoelastic fluid layer

MS Malashetty, M Swamy - Journal of non-newtonian fluid mechanics, 2010 - Elsevier
The onset of double diffusive convection in a viscoelastic fluid layer is studied using a linear
and a weak nonlinear stability analyses. The onset criterion for stationary, oscillatory and …

Thermal convection thresholds in an Oldroyd magnetic fluid in porous media

P Hounsou, CH Miwadinou, AV Monwanou - Pramana, 2023 - Springer
We have exploited the Oldroyd-B model to explain the appearance of stationary and
oscillatory convection in a viscoelastic magnetic fluid saturating a porous horizontal layer …

Convective and absolute instabilities in Rayleigh–Bénard–Poiseuille mixed convection for viscoelastic fluids

SC Hirata, LSB Alves, N Delenda… - Journal of fluid …, 2015 - cambridge.org
The convective and absolute nature of instabilities in Rayleigh–Bénard–Poiseuille (RBP)
mixed convection for viscoelastic fluids is examined numerically with a shooting method as …

Onset of convection in a porous medium layer saturated with an Oldroyd-B nanofluid

JC Umavathi, J Prathap Kumar - Journal of Heat …, 2017 - asmedigitalcollection.asme.org
A linear and nonlinear stability analysis of a viscoelastic fluid in a porous medium layer
saturated by a nanofluid with thermal conductivity and viscosity dependent on the …