男孩叫泽什么好听A photographic study of pool boiling in the region材料的英语
of the critical heat flux
期刊名称： AIChE Journal
中效消毒剂作者： Robert Cole
年份： 1960年
期号： 第4期
关键词： engineering and equipment;bubbles;criticality;heat
transfer;mathematics;measured values;photographic film;reynolds
杞人忧天的寓言故事number;surfaces;turbulence以头抢地耳
摘要：A photographic study was made to investigate the boiling phenomena in the neighborhood of th
教育的智慧e critical heat flux. The system consisted of an electrically heated zirconium ribbon, insulated on its underface, suspended in a pool of water at its saturation temperature. Measurements of bubble diameters, bubble positions relative to the heating surface, local bubble frequencies, and contact angles at known times intervals were obtained from the film. Results indicate that at high heat fluxes the primary forces acting on a bubble leaving the surface are the buoyancy and drag forces. A dimensionless relationship is developed relating bubble velocity, bubble diameter, and contact angle at breakoff. Drag coefficients for freely rising vapor bubbles a saturated liquid are found to be reprentable by the usual drag
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