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Special Topics & Reviews in Porous Media: An International Journal
ESCI SJR: 0.259 SNIP: 0.466 CiteScore™: 0.83

ISSN 印刷: 2151-4798
ISSN オンライン: 2151-562X

Special Topics & Reviews in Porous Media: An International Journal

DOI: 10.1615/SpecialTopicsRevPorousMedia.v3.i2.50
pages 139-148

FRICTIONAL PRESSURE DROP OF AN ADDITIVE-BASED NON-NEWTONIAN FLOW IN A PACKED BED

Suresh Kumar Patel
Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, PIN-781039, Assam, India
Subrata Kumar Majumder
Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, PIN-781039, Assam, India

要約

The influences of non-Newtonian liquid with and without additive on the pressure drop and friction factor in a packed bed have been studied. It is shown that the effect of the additive-based non-Newtonian liquid properties on pressure drop is significant. The additive reduces the pressure drop depending on the concentration of the additive and non-Newtonian liquid. Generally, the Ergun equation is a sufficient approximation of typical bed porosities values encountered in packed bed reactors. However, it is demonstrated that the original Ergun equation is only able to accurately predict the pressure drop of single-phase flow over spherical particles, whereas from the present study it is seen that it underpredicts the pressure drop of single-phase flow of non-Newtonian liquid. The variation of pressure drop in additive-based non-Newtonian liquid has been analyzed by empirical modeling and modifying the Ergun equation based on the physical properties of the additive-based non-Newtonian liquid. The proposed modified Ergun equation is able to predict single-phase pressure drop in a packed bed with and without additive-based non-Newtonian liquid within ± 10% error on average.