ISSN Online: 2377-424X
ISBN Print: 0-89116-130-9
International Heat Transfer Conference 6
RELATIONSHIP BETWEEN WALL SHEAR STRESS AND THE HEAT TRANSFER CRISIS PHENOMENON WITH VAPOUR/LIQUID FLOWS
Resumo
Critical heat flux characteristics for vapour/ liquid flows are examined in terms of the relation between the heat transfer crisis and wall shear stresses. A comparison of dryout data with corresponding pressure drop data shows that critical heat flux is related to the relevant pre-dryout and post-dryout friction regimes. From a consideration of experimental data for relatively low heat fluxes, a pseudo-dryout condition is identified corresponding to a 'slow burnout' condition. Observed differences, in critical heat flux characteristics for flows in tube and complex channel geometries are shown to be related to differences in shear stress characteristics.