Simulation of Solid Particles Behavior in a Heated Cavity at High Rayleigh Numbers

Figures & data

FIG. 1 Schematic of the heated cavity.

FIG. 2Time variation of fraction of particles of different sizes remaining suspended in the cavity for different Rayleigh numbers.

FIG. 3Locations of 10 μm particles after 50 s for different Rayleigh numbers.

FIG. 4Particle deposition for different Rayleigh numbers and particle diameters: (a) bottom wall; (b) cold wall.

FIG. 5Initial position of deposited particles in the cavity. 10 μm particles deposited on the bottom wall for (a) Ra = 10⁵ and (b) Ra = 10⁸; 0.01 μm particles deposited on the cold (right) wall for (c) Ra = 10⁵ and (d) Ra = 10⁸. Color indicates the deposition time in seconds. (Color figure available online.)

FIG. 6 Particle deposition on different walls in the absence and presence of thermophoresis for Ra = 10⁵ after 50 s of tracking for particle diameters of: (a) 0.01 μm, (b) 0.1 μm, (c) 1 μm.