High resolution numerical study of Rayleigh-Taylor turbulence using a thermal lattice Boltzmann scheme

Understand

We present results of a high resolution numerical study of two dimensional (2d) Rayleigh-Taylor turbulence using a recently proposed thermal lattice Boltzmann method (LBT).

• The goal of our study is both methodological and physical.
• We assess merits and limitations concerning small- and large-scale resolution/accuracy of the adopted integration scheme.
• We discuss quantitatively the requirements needed to keep the method stable and precise enough to simulate stratified and unstratified flows driven by thermal active fluctuations at high Rayleigh and high Reynolds numbers.