DRAG FORCE ON THE PARTICLES AT THE UPSTREAM END OF A PACKED-BED AND THE STABILITY OF THE ROOF OF BUBBLES IN FLUIDIZED-BEDS

• Tipo: Artigo em Revista Científica Internacional
• Data: 1992

Autores

CAMPOS, JBLM (Autor) FEUP; DECARVALHO, JRFG (Autor) Outra

Revista

Título: Chemical Engineering Science

Vol. 47

Páginas: 4057-4062

ISSN: 0009-2509

Editora: Elsevier

Indexação

ISI Web of Knowledge - 5 Citações

Scopus - 7 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia química

Outras Informações

ID Authenticus: P-001-P3M

DOI: 10.1016/0009-2509(92)85156-6

Abstract (EN): A study is reported on the "bed support experiment" in which measurements of the minimum supporting velocity are performed for a wide range of conditions. Values of the drag coefficient for the particles at the upstream end of a packed bed are then calculated, and the data are seen to be well represented by C* = 650/Re + 16.9. The analysis of drag forces is applied to a study of the stability of the roof of bubbles in fluidised beds. It is concluded that gas throughflow is sufficient to hold up the particles on the roof of spherical bubbles in 3D-beds, but that it is insufficient to prevent particles from raining down across cylindrical bubbles in 2D-beds.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6