Numerical simulation of turbulent natural convection in lng cylindrical tank with evaporation

Abstract

This study quantitatively examines turbulent natural convection in a heated cylindrical tank filled with liquefied natural gas (LNG). It employs Reynolds-averaged Navier-Stokes (RANS) with a low Reynolds number k-epsilon model and considers evaporative cooling. The simulation accurately captures turbulence dynamics, making it a valuable tool for predicting fluid behavior in the tank. Results reveal the relationship between Rayleigh number, flow intensity, and temperature fluctuations. Higher Rayleigh numbers lead to increased turbulent flow and viscosity. Recirculation jets form at the base, with the highest viscosity. The study also identifies non-uniform evaporative heat flux, intensified by turbulence and higher Rayleigh numbers.