CFD Modeling of Solid Suspension in a Stirred Tank: Effect of Drag Models and Turbulent Dispersion on Cloud Height. (30th August 2012)

• Record Type: Journal Article
• Authors: Gohel, Shitanshu; Joshi, Shitalkumar; Azhar, Mohammed; Horner, Marc; Padron, Gustavo
• Other Names: Nere Nandkishor Academic Editor.
• Is Part Of: International journal of chemical engineering. Volume 2012(2012)
• Publication Date: 2012-08-30
• Subjects: Chemical engineering -- Periodicals; Chemical engineering; Electronic journals; Periodicals; 660
• DOI: 10.1155/2012/956975
• Languages: English
• ISSNs: 1687-806X

Abstract

Abstract : Many chemical engineering processes involve the suspension of solid particles in a liquid. In dense systems, agitation leads to the formation of a clear liquid layer above a solid cloud. Cloud height, defined as the location of the clear liquid interface, is a critical measure of process performance. In this study, solid-liquid mixing experiments were conducted and cloud height was measured as a function operating conditions and stirred tank configuration. Computational fluid dynamics simulations were then performed using an Eulerian-Granular multiphase model. The effects of hindered and unhindered drag models and turbulent dispersion force on cloud height were investigated. A comparison of the experimental and computational data showed excellent agreement over the full range of conditions tested.