Numerical Study on Turbulent Flow and Heat Transfer in Circular Cavity with Moving Inner Hot Rod

Abstract:

Problems of turbulent flow and heat transfer in concentric annuli with moving inner hot rod are solved by the proposed steady equation method,and cost of computation is,therefore,cut down.Simulation is made to achieve the flow field and temperature field of whole computation area,which is approximate to what is achieved by classical experience equation.Partial wall Nu and wall temperature of hot rod as well as air temperature distribution near rod front and bottom are compared in three work conditions.Results indicate that enhanced heat release effect takes on when annuli flow has the reverse direction of rod,however when flow having the same moving direction,effect weaken.

Key words:numerical analysis; concentric annulus ; moving hot rod; heat transfer