Eulerian Model for Prediction of Particle Transport and Deposition in Turbulent Duct Flows with Thermophoresis

Figures & data

FIG. 1. Profiles of in fully developed turbulent flow for particle response times τ⁺_p = 0.2, 1, 5, and 25, from the turbulent channel-flow simulations of Picciotto et al. (2005) at Re_τ = 150.

FIG. 2. Profiles of in the near-wall region of fully developed turbulent flow for particle response times τ⁺_p = 0, 2.5, 5, and 10, calculated as solutions to Equation (8[8] ), with Equation (9[9] ) as the initial condition.

FIG. 3. Turbophoretic particle deposition velocity V⁺_dep in turbulent channel flow, as a function of the particle relaxation timescale τ⁺_p, for the model predictions of Equation (16[16] ) and the experimental data of Liu and Agarwal (1974): × at Re = 10, 000 and + at Re = 50, 000.

FIG. 4. (a) The particle mass flux boundary condition applied at the pipe surface. (b) The mixed-mean temperature as a function of cooling-section inlet temperature T_in in the heated pipe-flow experiments of Romay et al. (1998).

FIG. 5. Deposition efficiency η of NaCl particles as a function of cooling-section inlet temperature T_in in laminar pipe flow at Re = 1397. Solid lines describe model predictions and symbols denote the experimental data of Romay et al. (1998).

FIG. 6. Deposition efficiency η of NaCl particles as a function of cooling-section inlet temperature T_in in pipe flow at Re = 5517. Solid lines describe model predictions and symbols denote the experimental data of Romay et al. (1998).

FIG. 7. Deposition efficiency η of NaCl particles as a function of cooling-section inlet temperature T_in in pipe flow at Re = 9656. Solid lines describe model predictions and symbols denote the experimental data of Romay et al. (1998).

Picciotto, M., Marchioli, C., Reeks, M. W., and Soldati, A. (2005). Statistics of Velocity and Preferential Accumulation of Micro-Particles in Boundary Layer Turbulence. Nuclear Eng. Des., 235:1239–1249.

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Liu, B. Y. H., and Agarwal, J. K. (1974). Experimental Observation of Aerosol Deposition in Turbulent Flow. Aerosol Sci., 5:145–155.

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Romay, F. J., Takagaki, S. S., Pui, D. Y. H., and Liu, B. Y. H. (1998). Thermophoretic Deposition of Aerosol Particles in Turbulent Pipe Flow. J. Aerosol Sci., 29:943–959.

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