Impact of flow-corrective insert on flow patterns in two-dimensional moving bed

Shu San Hsiau, Jiri Smid, Yau Pin Chyou, Ti Chen Liu, Ta Ching Huang, Chia Jen Hsu

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


This paper presents the study of the flow patterns inside a granular moving bed in a quasi-two-dimensional (2D) model of a granular moving bed filter (GMBF) vessel with vertical walls and a mass flow hopper. Fine quartz sand was chosen as the granular filter media in experiments. The related flow properties were measured by a Jenike Shear Tester. According to the flow properties of fine silica sand and Johanson's theory, a 2D moving-bed apparatus was built, with transparent walls and the flow-corrective insert to diminish the quasi-stagnant zones along the side walls. The flow patterns and velocity profiles of silica sand in the system with flow-corrective insert were studied experimentally, and the effect of the location of the flow-corrective insert on the internal flow patterns was investigated. The optimal placement of flow-corrective insert according to Johansson's theory was demonstrated to efficiently diminish the quasi-stagnant zones near the side walls. Little vertical shift of the flow-corrective insert from optimal position changed the stable and uniform mass flow pattern of moving bed into the funnel flow.

Original languageEnglish
Pages (from-to)7-15
Number of pages9
JournalChemical Engineering and Processing: Process Intensification
StatePublished - Nov 2013


  • Flow-corrective insert
  • Granular moving bed
  • Internal flow pattern
  • Two-dimensional apparatus


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