Characterization of feeder effects on continuous solid mixing using fourier series analysis

Yijie Gao, Fernando Muzzio, Marianthi Ierapetritou

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


Variance reduction ratio (VRR) is generally considered as an important index in characterizing the continuous powder mixing. Although the capacity of the mixer to smooth out feeder fluctuations can be expressed by the VRR, few studies are performed quantitatively in this area. The feeder effects are investigated on the solid mixer through the Fourier series analysis. The VRR is deduced quantitatively using the Fourier series of the feed rate variability and the residence time distribution (RTD), which facilitate the explicit decomposition of VRR into intensities of different frequency components. It provides a novel model to determine whether the integrated feeder-mixer system satisfies specific solid mixing performance criteria, and provides guidelines of system improvement.

Original languageEnglish (US)
Pages (from-to)1144-1153
Number of pages10
JournalAIChE Journal
Issue number5
StatePublished - May 2011

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Environmental Engineering
  • Chemical Engineering(all)


  • Continuous mixing
  • Fourier series
  • Variance reduction ratio


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