Particle-to-fluid heat transfer in particle-laden turbulence

Pouransari, Hadi; Mani, Ali

doi:10.1103/PhysRevFluids.3.074304

Particle-to-fluid heat transfer in particle-laden turbulence

Journal Article · Wed Jul 25 00:00:00 EDT 2018 · Physical Review Fluids

DOI:https://doi.org/10.1103/PhysRevFluids.3.074304· OSTI ID:1461646

Pouransari, Hadi ^[1]; Mani, Ali ^[2]

Stanford Univ., CA (United States). Dept. of Mechanical Engineering; Stanford University
Stanford Univ., CA (United States). Dept. of Mechanical Engineering

Preferential concentration of inertial particles by turbulence is a well-recognized phenomenon. This work investigates how this phenomenon impacts the mean heat transfer between the fluid phase and the particle phase. Using direct numerical simulations of homogeneous and isotropic turbulent flows coupled with Lagrangian point particle tracking, we explore this phenomenon over a wide range of input parameters. Among the nine independent dimensionless numbers defining this problem, we show that the particle Stokes number, defined based on a large-eddy time, and an identified number called the heat-mixing parameter have the most significant effect on particle-to-gas heat transfer, while variation in other nondimensional numbers can be ignored. An investigation of regimes with significant particle mass loading suggests that the mean heat transfer from particles to gas is hardly affected by momentum two-way coupling. Using our numerical results, we propose an algebraic reduced-order model for heat transfer in particle-laden turbulence.

View Accepted Manuscript (DOE)

Research Organization:: Stanford Univ., CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0002373

OSTI ID:: 1461646

Alternate ID(s):: OSTI ID: 1461597

Journal Information:: Physical Review Fluids, Journal Name: Physical Review Fluids Journal Issue: 7 Vol. 3; ISSN 2469-990X

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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42 ENGINEERING
Heat Transfer
Particle-laden flows
Turbulence
turbulent multiphase flows

Particle-to-fluid heat transfer in particle-laden turbulence

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References (26)

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