Study on clogging mechanism of fibrous materials in a pump by experimental and computational approaches

H. Kudo*, T. Kawahara, H. Kanai, K. Miyagawa, S. Saito, M. Isono, M. Nohmi, H. Uchida, M. Kawai

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

8 Citations (Scopus)


Clogging trouble in a sewage pump is a serious problem caused by foreign substances like strings, towels, and cloths. However, mechanism of pump clogging is significantly complicated and it is difficult to clarify factors affecting pump clogging. In this paper, the simplified air duct test and axial fan test are introduced and some parameter studies based on design of experiments (DOE) were conducted. From the DOE results, the sensitivity of each parameter to the clogging was predicted. As the parameters related to the clogging, length and rigidity of the strings, leading shape and lean angle of obstacles, flow velocity in a measuring section were selected. Behavior of string in the pump was also observed in the actual pump apparatus and was compared to that in the air duct. Computational simulation with simplified flow fields and MBD (Multi Body Dynamics) was developed and applied to predict behavior of a string in the pump. These experiments and computation are effective to detect and classify the clogging mechanism. These approaches aided to establish one of the evaluation methods on anti-clogging performance against fibrous materials.

Original languageEnglish
Article number012011
JournalIOP Conference Series: Earth and Environmental Science
Publication statusPublished - 2014
Event27th IAHR Symposium on Hydraulic Machinery and Systems, IAHR 2014 - Montreal, Canada
Duration: 2014 Sept 222014 Sept 26

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)


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