Journal of Nuclear Science and Technology · 1986 · 10 citations · 0 references
EngineeringMechanical EngineeringFluid DynamicsHeat TransferThermal AnalysisHeat ConductionHeat FlowHeat Transfer AnalysisHeat Transfer In FluidsHeat Transfer ModelingThermal Boundary LayersConvectionFlow PatternFlow Pattern AnalysisHeat Transfer In Annular FlowNatural ConvectionShieldingThermal ConvectionWall Heat Transfer
The natural convection characteristics of gas in a vertical narrow annular gap which had its bottom opened to high temperature fluid and its upper shielding exposed to low temperature sealant have been evaluated from simulated fluid experiments using water and from calculations using the three-dimensional thermal hydraulic analysis computer code THERVIS-III.The following results were obtained :The critical Rayleigh number which represented the limit of convection generation increased as the aspect ratios (height/circumference) and c2 (height/gap distance) increased.