Numerical comparison of airborne particles deposition and dispersion in radiator and floor heating systems

Eulerian–Lagrangian modeling of solid particle behavior in a square cavity with several pairs of heaters and coolers inside

“…Oztop et al • Following [9][10][11][12]14], it is assumed that for such low volume fractions of solid particles considered here the particles have negligible effects on the flow field (one-way coupling); • The initially stagnant particles are distributed randomly inside the cavity; • Local thermal equilibrium is assumed between the particle and the ambient fluid; • The rebound Particles are considered sticky, i.e., they will stick to the surface when they come in contact with the walls. Considering the low concentration of particles, this widely-used assumption [e.g., in 9,11,14,18], should not affect the results significantly.…”

“…Moreover, their results showed that the effects of thermophoretic lead to more particles to be deposited on the cold walls. Golkarfard et al [14] numerically examined the deposition and dispersion of airborne particles in radiator and floor heating systems in a turbulent flow regime. Their results indicated that percentage of suspended particles in radiator heating system was higher than that of the floor heating for any of the specified particle diameters.…”

“…Such system a type of particulate flow, a multiphase system of disperse phase (solid particles) and the carrier phase (ambient fluid). several studies have been carried out to provide a better understanding of such multiphase system using the hybrid Eulerian-Lagrangian methods [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27], where the carrier phase and disperse phase are simulated by Eulerian and Lagrangian approaches (one-way or two-way coupled), respectively. A less typical approach, which is more suitable for denser particulate flows, is based on a continuum description of particle material (a multiphase non-Newtonian multiphase system) solved using an Eulerian-Eulerian or (more recently) LagrangianLagrangian approaches [28,29].…”

Eulerian–Lagrangian analysis of solid particle distribution in an internally heated and cooled air-filled cavity

“…particle deposition on heat exchanger surfaces can reduce the heat transfer rate and adversely affect the energy efficiency of these equipment [8,9]. Therefore, several studies have been carried out to understand this problem using Eulerian-Lagrangian methods [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27].…”

Effect of Zero Air Change Rate On Particle Dispersion in A Room with Floor Heating

“…Although particle behaviors in a space is introduced as the most critical disadvantages of floor heating systems, there are limited studies on this subject. Golkarfard and Talebizadeh were numerically compared floor and radiator heating systems in terms of particle distribution, whose diameter is between 3 and 10 µm, in a room [11]. They found that, particle concentration in radiator heating was found higher than floor heating system for all investigated particle diameters.…”