STUDY OF PLUME BEHAVIOUR TWO HEATED CYLINDERS AT HIGH RAYLEIGH NUMBER USING LATTICE BOLTZMANN METHOD

摘要

In this paper, plume behavior of two heated square cylinder located side by side at various distance inside an enclosure has been studied numerically using lattice Boltzmann method in the range of lb' < Ra 10'. The doublepopulation lattice Boltzmann formulation is used as the governing equation. Two dimensional nine-velocity models (D2Q9) me used for the computation of both velocity field and temperature field at all simulated Rayleigh numbers, Ra. The computational results demonstrated that the flow pattern, numbers, size and formation of vortex and also the heat transfer mechanism are critically dependence on the Ra and the distance between two heated inner square cylinders.