Two-dimensional numerical simulation of a steady-state buoyancy-driven flow in a semi-confined enclosure with a line heat source

2010 ◽  
Vol 10 ◽  
pp. 012040
Author(s):  
T Hattori ◽  
S W Armfield ◽  
M P Kirkpatrick
Keyword(s):  
Numerical Simulation ◽  
Steady State ◽  
Heat Source ◽  
Two Dimensional ◽  
Line Heat Source

scholarly journals Some characteristics of the resultant air flow from motions induced by ventilation and heat source in a two-dimensional enclosure

2015 ◽  
Vol 37 (3) ◽  
pp. 177-186
Author(s):  
T. V. Tran ◽  
N. T. Thuy
Keyword(s):  
Numerical Simulation ◽  
Reynolds Number ◽  
Natural Convection ◽  
Rayleigh Number ◽  
Heat Source ◽  
Air Flow ◽  
Stationary Motion ◽  
Two Dimensional ◽  
Different Types ◽  
Heat Amount

Ventilated air flow in an enclosure is often unsteady (turbulent) at even very low Reynolds number (Re). Meantime natural convection in a box is stationary motion at large enough Rayleigh number (Ra). This paper deals with the interaction between two those flows in a two-dimensional room. The room has one inlet and one or two outlets. A heat source locates on the floor. The numerical simulation of the interaction is carried out at some values of Re and Ra for two cases of the inlet and outlet configuration. Some interesting characteristics of the resultant flow are discovered. The heat amount released by the source and removed from the room by different types of this flow is also provided.

Compaction of Anisotropic Granular Materials: Symmetry Effects

2006 ◽  
Vol 518 ◽  
pp. 355-360
Author(s):  
Lj. Budinski-Petković ◽  
M. Petković ◽  
Z.M. Jakšić ◽  
S.B. Vrhovac
Keyword(s):  
Numerical Simulation ◽  
Monte Carlo ◽  
Steady State ◽  
Granular Materials ◽  
Power Law ◽  
Symmetry Axis ◽  
Random Sequential Adsorption ◽  
Two Dimensional ◽  
Sequential Adsorption ◽  
First Time

We perform numerical simulation of a lattice model for the compaction of a granular material based on the idea of reversible random sequential adsorption. Reversible random sequential adsorption of objects of various shapes on a two−dimensional triangular lattice is studied numerically by means of Monte Carlo simulations. The growth of the coverage ρ(t) above the jamming limit to its steady−state value ρ∞ is described by a pattern ρ (t) = ρ∞ − ρEβ[−(t/τ)β], where Eβ denotes the Mittag−Leffler function of order β ∈ (0, 1). For the first time, the parameter τ is found to decay with the desorption probability P− according to a power law τ = A P− −γ. Exponent γ is the same for all shapes, γ = 1.29 ± 0.01, but parameter A depends only on the order of symmetry axis of the shape. Finally, we present the possible relevance of the model to the compaction of granular objects of various shapes.

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