25 citations · 91 across the 12 of their papers we have counts for
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Mixed convection and onset of instability due to asymmetric wall heat fluxes in a porous channel
A. Barletta, M. Celli, P. V. Brandão
The problem of convective instability onset in a horizontal porous channel is explored. The channel's impermeable walls are heated with asymmetric thermal conditions modelled throu…
Wall roughness and viscous dissipation effects in microchannel heat sinks with semicircular cross-section
A. Barletta, M. Celli, P. V. Brandão
A statistical analysis of the wall roughness effect is carried out to determine the impact of the shape uncertainty on the Poiseuille number and Nusselt number of laminar forced co…
Laminar forced convection characteristics in a round microchannel with shape uncertainty: effect of wall slip
L. A. Sphaier, A. Barletta, M. Celli +3
The shape of a microchannel cross-section is usually affected by a significant uncertainty due to the small hydraulic diameter. Such an uncertainty is indeed present at any scale,…
Shape uncertainty analysis of laminar forced convection in a round microchannel with viscous dissipation
A. Barletta, M. Celli, L. A. Sphaier +3
The shape of a microchannel is usually affected by a significant uncertainty due to the small size of the cross-section, comparable with the typical wall-roughness length scale. Su…
Dissipation instability of Couette-like adiabatic flows in a plane channel
A. Barletta, M. Celli, S. Lazzari +1
The mixed convection flow in a plane channel with adiabatic boundaries is examined. The boundaries have an externally prescribed relative velocity defining a Couette-like setup for…
Viscous heating and instability of the adiabatic buoyant flows in a horizontal channel
A. Barletta, M. Celli, D. A. S. Rees
The stability of buoyant flows occurring in the mixed convection regime for a viscous fluid in a horizontal plane-parallel channel with adiabatic walls is investigated. The basic f…
Gill's problem in a sandwiched porous slab
Antonio Barletta, Michele Celli, Stefano Lazzari +1
The classical Gill's stability problem for the stationary and parallel buoyant flow in a vertical porous slab with impermeable and isothermal boundaries kept at different temperatu…
On the use and misuse of the Oberbeck-Boussinesq approximation
A. Barletta, M. Celli, D. A. S. Rees
The Oberbeck-Boussinesq approximation is the most widely employed theoretical scheme for the study of natural or mixed convection flows. However, the misunderstanding of this appro…
Effects of anisotropy on the transition to absolute instability in a porous medium heated from below
Michele Celli, Antonio Barletta
The emerging instability of a forced throughflow in a fluid saturated horizontal porous duct of rectangular cross section is investigated. The duct is heated from below by assuming…
Rayleigh-Bénard instability of an Ellis fluid saturating a porous medium
Michele Celli, Antonio Barletta, Pedro V. Brandão
Unlike the power-law model, the Ellis model describes the apparent viscosity of a shear-thinning fluid with no singularity in the limit of a vanishingly small shear stress. In part…
On the stability of parallel flow in a vertical porous layer with annular cross-section
A. Barletta, M. Celli, D. A. S. Rees
The linear stability of buoyant parallel flow in a vertical porous layer with an annular cross-section is investigated. The vertical cylindrical boundaries are kept at different un…
Buoyant flow and instability in a vertical cylindrical porous slab with permeable boundaries
A. Barletta, M. Celli, D. A. S. Rees
The basic stationary buoyant flow in a vertical annular porous passage induced by a boundary temperature difference is investigated. The vertical cylindrical boundaries are conside…