Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session ZC35: Particle-Laden Flows and Fluidization
12:50 PM–3:00 PM,
Tuesday, November 21, 2023
Room: 202A
Chair: Federico Municchi, Colorado School of Mines
Abstract: ZC35.00010 : Particle dispersion in fluidized bed heat exchangers from Eulerian-Lagrangian simulations*
2:47 PM–3:00 PM
Presenter:
Federico Municchi
(Colorado School of Mines)
Authors:
Federico Municchi
(Colorado School of Mines)
Gregory Jackson
(Colorado School of Mines)
We perform Eulerian-Lagrangian simulations to investigate the effects of extended surfaces in narrow-channel fluidized bed heat exchangers on particle dispersion. To demonstrate the effectiveness of extended surfaces, we compare the overall particle-based dispersion coefficient without extended surfaces against aligned and staggered extended surface configurations. We also quantify the degree of mixing in the three dimensions using the Lacey index. Our simulations show that the extended surfaces pose a significant obstacle to the flow of particles, reducing the size and the age of bubbles in the bed. This mechanism reduces vertical mixing, thus mitigating vertical temperature flattening in fluidized bed heat exchangers.
*U.S. DOE Solar Energy Technologies Office under Grant DE-EE0009812 (R. Vijaykumar program manager) The current project is a collaboration with Brayton Energy – Bill Caruso and Jesse Fosheim.
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