Mass transfer from small spheroids suspended in a turbulent fluid

By coupling direct numerical simulation of homogeneous isotropic turbulence with a localised solution the convection–diffusion equation, we model rate transfer solute (mass transfer) from surface small, neutrally buoyant, axisymmetric, ellipsoidal particles (spheroids) in dilute suspension within turbulent fluid at large Péclet number, $\textit {Pe}$ . We observe that, {Pe} = O(10)$ , average for prolate spheroids is larger than that spheres equivalent area, whereas oblate experience lower rate. However, as number increased, can an enhancement mass relative to near optimal aspect ratio $\lambda \approx 1/4$ Furthermore, spherical particles, Sherwood {Sh}$ scales approximately {Pe}^{0.26}$ over 1.4\times 10^{1}$ $1.4\times 10^{4}$ which below {Pe}^{1/3}$ scaling observed inertial but consistent available experimental data tracer-like particles. The discrepancy attributed diffusion-limited temporal response concentration boundary layer strain fluctuations. A simple model, quasi-steady flux captures both these phenomena and shows good quantitative agreement our simulations.