Packing Characteristics and Its Effect on Heat Transfer Characteristics in Melting of Granular Packed Bed Subject to Horizonal Forced Convection

2002 ◽  
Author(s):  
Y. L. Hao ◽  
Y.-X. Tao
Keyword(s):  
Heat Transfer ◽  
Forced Convection ◽  
Melting Process ◽  
Packed Bed ◽  
Time Interval ◽  
Heat Transfer Characteristics ◽  
Transfer Characteristics ◽  
Ice Particles ◽  
Different Types ◽  
Series Of Experiments

A series of experiments are conducted to investigate the characteristics and its effect on the melting and heat of a packed bed consisting of melting ice particles to horizontal forced convection. The volumes and situations of the melting ganular packed beds are by the visualization observations and measurements digital camcorders within the range of Re = 71 ~ 2291, Gr/Re2 = 1.48×10−5 ~ 17.32, and Ste = 0.0444 ~ 0.385, respectively. The mass of ice particles is measured at the time interval during the melting process. Two types of pattern can be found under the different conditions. The different types of heat transfer characteristics emerge in type of packing pattern. The correlations for each type of pattern are obtained based on the experimental results.

Heat Transfer Characteristics in Convective Melting of a Solid Particle in a Fluid

1999 ◽  
Author(s):  
Y. L. Hao ◽  
Y.-X. Tao
Keyword(s):  
Heat Transfer ◽  
Solid Particle ◽  
Digital Video ◽  
Melting Process ◽  
Packed Bed ◽  
Video Camera ◽  
Shape Variation ◽  
Heat Transfer Characteristics ◽  
Flowing Fluid ◽  
Transfer Characteristics

Abstract An experimental investigation is conducted to study the heat transfer characteristics in convective melting of a solid particle in a flowing fluid. An ice sphere is used to represent the solid particle. This experiment serves as a basis for further improvement of numerical modeling on the convective melting of a single particle or a packed bed. The process of convective melting of an ice sphere in a horizontal, flowing water is visualized by using a digital video camera under controlled flow rate and supply water temperature. From the digital video images the shape changes of the ice sphere are measured, and the melting rate and heat transfer rate between fluid and particle is determined. A shape factor that indicates shape variation of particle in the melting process is defined. An empirical correlation that can be used to calculate the liquid-solid heat transfer coefficient in convective melting of a solid particle in a flowing fluid was obtained.

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