Apparent drag reduction phenomenon in the defluidized packed dense bed of the multisolid pneumatic transport bed

✍ Scribed by Liang-Shih Fan; Masayuki Toda; Sunil Satija

• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 825 KB
• Volume: 40
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(85)85033-8

✦ Synopsis

Experiments were performed to study the pressure drop behavior in the packed bed of dense particles in the multisolid pneumatic transport bed (MPTB). The packed bed under extensive analysis is established by fluidizing and then defluidizing the dense particle bed by increasing and then decreasing the air flow rate at a constant fine particle flow rate. The pressure drop in a packed bed established in this manner initially decreases significantly and then increases as the fine particle flow rate increases at a given air flow rate. This behavior signifies the apparent drag reduction phenomenon in the defluidized packed bed. The classical pressure drop equation by Ergun[l] was modified to account for this phenomenon.