Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session L41: Particle-Laden Flows: Particle-Turbulence Interactions II
8:00 AM–10:36 AM,
Monday, November 20, 2023
Room: 206
Chair: Mona Rahmani, University of British Columbia
Abstract: L41.00006 : The Effect of Particle Collisions on Heat Transfer in a Thermally Developing Mixing Layer in a Dilute Turbulent Particle-Laden Flow*
9:05 AM–9:18 AM
Presenter:
Hamid Reza Zandi Pour
(Politecnico di Torino)
Authors:
Hamid Reza Zandi Pour
(Politecnico di Torino)
Michele Iovieno
(Politecnico di Torino)
The initial temperature difference between the two regions correlates temperature and velocity fluctuations in the mixing layer. However, scattering due to particle collisions tends to reduce these correlations. We quantitatively evaluate the overall impact on the average heat transfer and single point statistics of fluids and particles by comparing them with a collisionless regime. Remarkably, even at the highest simulated Stokes numbers, the effect remains minor. In addition, we present statistical data on the temperature difference between colliding particles under various flow conditions and collision rates. In particular, our results indicate that collisions do not significantly hinder the ability of particles to modulate fluid temperature fluctuations.
*We acknowledge PRACE for awarding us access to high performance computing and special storage resources at HPC Vega-IZUM, Maribor, Slovenia under the PRACE EuroHPC Development Access project 2023D02-007.
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