Convection in multiphase flows using Lattice Boltzmann methods
Abstract
We present high resolution numerical simulations of convection in multiphase flows (boiling) using a novel algorithm based on a Lattice Boltzmann method. We first validate the thermodynamical and kinematical properties of the algorithm. Then, we perform a series of 3d numerical simulations at changing the mean properties in the phase diagram and compare convection with and without phase coexistence at . We show that in presence of nucleating bubbles non-Oberbeck Boussinesq effects develops, mean temperature profile becomes asymmetric, heat-transfer and heat-transfer fluctuations are enhanced. We also show that small-scale properties of velocity and temperature fields are strongly affected by the presence of buoyant bubble leading to high non-Gaussian profiles in the bulk.
Cite
@article{arxiv.1111.0905,
title = {Convection in multiphase flows using Lattice Boltzmann methods},
author = {L. Biferale and P. Perlekar and M. Sbragaglia and F. Toschi},
journal= {arXiv preprint arXiv:1111.0905},
year = {2015}
}
Comments
5 pages, 3 figures