Powder flow criteria for design of vertical silo walls

Engenharia Agrícola

José P. Lopes Neto²  José W. B. Do Nascimento¹  Rafael C. Silva¹  Carlos A. Da Costa¹ 

[1] ,Federal University of Campina Grande Department of Agricultural Engineering Campina Grande Paraíba ,Brazil

关键词: discharge outlet;    reduced models;    flowability;    orifício de descarga;    modelo reduzido;    fluabilidade;   

DOI  :  10.1590/S0100-69162013000300003

来源: SciELO

【 摘 要 】

For design of vertical silos walls involving the storage of bulk solids to be safe and reliable, it is important knowing the largest possible number of variables such as: flow properties, silo geometry and pattern of flow desired. In order to validate the theories of flow prediction and design of conical hoppers, the flow properties of two bulk solids were determined, the theories of Jenike's flowability and Enstad and Walker for hopper design were analyzed and the results were compared with those experimentally obtained in a reduced model of a semicircular-section silo. Results show that Enstad theory for the hopper design is adequate to occur mass flow inside the silo, and for the sizing of the discharge outlet, the Walker's theory was closer to the appropriate than Jenike's theory, which was higher around 100% than the experimental hopper outlet.

【 授权许可】

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