Analytical modeling of large-particle-coal hydrotransport. [Force balance model]
Interactive flow phenomena have been analyzed to support the mechanistic force balance modeling approach to large particle hydrotransport. Particular emphasis is given to analyzing particle saltation and suspension criteria and to physical modeling of interfacial shear and throughbed flow. The force balance modeling approach has previously been concluded to offer the best physical basis for scaleup calculation of large particle hydrotransport pressure drop and lower limits of operation. Improvements are still needed, however, in describing large particle suspension transition for d/D>0.05. Alternate approaches to modeling interfacial shear are discussed and results presented. Insufficient data are available to conclude which approach is most adequate. Throughbed flow was investigated experimentally and concluded to be negligible under certain conditions. Physical parameter dependency of the force balance model approach on sliding friction, loose packed bed fraction, and specific gravity are discussed as well as operating parameters such as delivered concentration, particle size, and pipe size.
- Research Organization:
- Pacific Northwest Lab., Richland, WA (USA)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 5646886
- Report Number(s):
- PNL-SA-8897; CONF-820512-1; ON: DE82005875
- Resource Relation:
- Conference: ASME material handling conference, Houston, TX, USA, 16 May 1982; Other Information: Portions of document are illegible
- Country of Publication:
- United States
- Language:
- English
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