Bulletin of JSME · 1959 · 26 citations · 0 references
EngineeringChemical EngineeringMechanical EngineeringFluid DynamicsHeat TransferTransport PhenomenaHeat FlowHeat Transfer FundamentalsHeat Transfer In FluidsThermal Boundary LayersTurbulent FlowTurbulent TransportConvectionExperimental StudiesFree ConvectionFree Convection In FluidsHeat Transfer CoefficientsHeat Transfer In Boundary LayersThermal ConvectionTurbulent Flow Heat Transfer
The free convection heat transfer from a vertical cylinder of about 360 mm in height and about 76 mm in diameter to ethyleneglycol or water has been studied experimentally. The local heat transfer coefficients, which are measured directly, are scarcely affected by the development of the vortex street in the boundary layer, but are discontinuously increased by the transition to a turbulent flow. The results for ethyleneglycol are as follows : GrPr < 8.5×109 : Nux=0.49 (GrxPr)1/4 8.5×109 < GrPr < 8×1010 : Nn=0.87 (GrPr)1/4 The temperature distributions in the boundary layer are also measured.