Computation of turbulent buoyant flows in enclosures with low-Reynolds-number κ-ω models

摘要

This work deals with the computation of turbulent buoyant convection flows with thermal stratification using the low-Reynolds- number (LRN) κ-ω model. When applying the κ-ε model to buoyancy-driven cavity flows induced by differentially heated side walls, a problem commonly encountered at moderate Rayleigh numbers (Ra = 10~10 - 10~12) is that the model is not capable of giving grid- independent predictions owing to the transition regime along the vertical walls.