Theoretical analysis of heat transfer due to particle impact
The heat exchange between impacting spherical particles or a particle and a surface is analyzed. The purpose of the study is to obtain quantitative understanding of the direct conductive contribution of particles in suspension flows and fluidized beds. The change of the contact area with time is determined from classical elastic theory. The heat exchange for each impact of particles is expressed by a simple one-dimensional heat conduction solution multiplied by a correction factor. The factor is calculated numerically for most of the solid materials. By comparing experimental measurements from a fluidized bed, the solution verifies that for particles with low thermal conductivity, the conduction effect is not an important mechanism for the total heat transfer process, but when the particle has high thermal conductivity or the surrounding gas has low conductivity, the conduction heat transfer may become important. 7 refs., 5 figs.
- Research Organization:
- Illinois Univ., Urbana (USA). Dept. of Mechanical and Industrial Engineering
- DOE Contract Number:
- FG22-85PC80511
- OSTI ID:
- 7192046
- Report Number(s):
- CONF-861211-19; ON: DE87000862
- Resource Relation:
- Conference: American Society of Mechanical Engineers winter meeting, Anaheim, CA, USA, 7 Dec 1986
- Country of Publication:
- United States
- Language:
- English
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