Rayleigh–Taylor and Richtmyer-Meshkov instability induced flow, turbulence, and mixing. II

Numerical study of MHD nanofluid natural convection in a baffled U-shaped enclosure

Natural Convection セッション

Rayleigh-Taylor and Richtmyer-Meshkov instabilities: A journey through scales

In this paper, we present a simple and accurate lattice Boltzmann (LB) model for immiscible two-phase flows, which is able to deal with large density contrasts. This model utilizes two LB equations, one of which is used to solve the conservative Allen-Cahn equation, and the other is adopted to solve the incompressible Navier-Stokes equations. A forcing distribution function is elaborately designed in the LB equation for the Navier-Stokes equations, which make it much simpler than the existing LB models. In addition, the proposed model can achieve superior numerical accuracy compared with previous Allen-Cahn type of LB models. Several benchmark two-phase problems, including static droplet, layered Poiseuille flow, and spinodal decomposition are simulated to validate the present LB model. It is found that the present model can achieve relatively small spurious velocity in the LB community, and the obtained numerical results also show good agreement with the analytical solutions or some available results. Lastly, we use the present model to investigate the droplet impact on a thin liquid film with a large density ratio of 1000 and the Reynolds number ranging from 20 to 500. The fascinating phenomena of droplet splashing is successfully reproduced by the present model and the numerically predicted spreading radius exhibits to obey the power law reported in the literature.

Phase-field-based lattice Boltzmann modeling of large-density-ratio two-phase flows.

Simulations of natural convection heat transfer in an enclosure at different Rayleigh number using lattice Boltzmann method

Forced convection for flow across two tandem cylinders with rounded corners in a channel

A novel two-dimensional coupled lattice Boltzmann model for thermal incompressible flows

A bounce back-immersed boundary-lattice Boltzmann model for curved boundary

Transient behaviors of mixed convection in a square enclosure with an inner impulsively rotating circular cylinder

Yikun Wei

Papers

Simulations of natural convection heat transfer in an enclosure at different Rayleigh number using lattice Boltzmann method

Forced convection for flow across two tandem cylinders with rounded corners in a channel

A novel two-dimensional coupled lattice Boltzmann model for thermal incompressible flows

A bounce back-immersed boundary-lattice Boltzmann model for curved boundary

Transient behaviors of mixed convection in a square enclosure with an inner impulsively rotating circular cylinder