Mass transfer from small spheroids suspended in a turbulent fluid
Open Access
- 21 October 2021
- journal article
- research article
- Published by Cambridge University Press (CUP) in Journal of Fluid Mechanics
Abstract
By coupling direct numerical simulation of homogeneous isotropic turbulence with a localised solution of the convection–diffusion equation, we model the rate of transfer of a solute (mass transfer) from the surface of small, neutrally buoyant, axisymmetric, ellipsoidal particles (spheroids) in dilute suspension within a turbulent fluid at large Péclet number, scaling observed for inertial particles but consistent with available experimental data for tracer-like particles. The discrepancy is attributed to the diffusion-limited temporal response of the concentration boundary layer to turbulent strain fluctuations. A simple model, the quasi-steady flux model, captures both of these phenomena and shows good quantitative agreement with our numerical simulations.Funding Information
- H2020 Marie Skłodowska-Curie Actions (846648)
This publication has 41 references indexed in Scilit:
- Orientation statistics of small particles in turbulenceNew Journal of Physics, 2011
- Momentum and heat transfer phenomena of spheroid particles at moderate Reynolds and Prandtl numbersInternational Journal of Heat and Mass Transfer, 2011
- Heat transfer in particulate flows with Direct Numerical Simulation (DNS)International Journal of Heat and Mass Transfer, 2009
- Lagrangian Properties of Particles in TurbulenceAnnual Review of Fluid Mechanics, 2009
- On the orientation of ellipsoidal particles in a turbulent shear flowInternational Journal of Multiphase Flow, 2008
- Archival correlations for average heat transfer coefficients for non-circular and circular cylinders and for spheres in cross-flowInternational Journal of Heat and Mass Transfer, 2004
- Unsteady heat or mass transport from a suspended particle at low Péclet numbersJournal of Fluid Mechanics, 1997
- An improved measure of strain state probability in turbulent flowsPhysics of Fluids, 1994
- A note on the rate of heat or mass transfer from a small particle freely suspended in a linear shear fieldJournal of Fluid Mechanics, 1980
- Asymptotic expansions for laminar forced-convection heat and mass transferJournal of Fluid Mechanics, 1965