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<p>Since the conveyed sewage of sewage pumps contained a large amount of flexible cloth-like materials, which could easily lead to the clogging of sewage pumps. In this paper, the CFD-DEM method and high-speed photography were used to clarify the clogging mechanism of the sewage pump. Firstly, the Hertz-Mindlin nonslip model was improved based on the linear cohesion model, and the textile model was established by using the CFD-DEM method. Then, the numerical model was applied to the sewage pump and compared with visualization experiments. The reliability of the model was verified by comparing the different rotational speeds and the size of textiles. Finally, the relationship between the speed, the size of textiles, and the number of textiles on the clogging mechanism and flow field characteristics of the sewage pump was explored. The study provides theoretical support for the development of sewage pumps resistant to flexible cloth-like materials. Future work could extend this framework to investigate multi-scale textile mixtures (e.g., combined fibers and large rags) and long-term wear effects caused by textile accumulation, which are critical for industrial applications requiring durability and adaptability to heterogeneous sewage compositions.</p>

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Study on textile clogging mechanism based on CFD-DEM method and experiments

  • 期刊论文

  • 发表日期：

    2025年6月4日

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  • Yun Ren,
  • Xiaofan Mo,
  • Bo Yang,
  • Shuihua Zheng,
  • Lanfang Jiang

摘要

Since the conveyed sewage of sewage pumps contained a large amount of flexible cloth-like materials, which could easily lead to the clogging of sewage pumps. In this paper, the CFD-DEM method and high-speed photography were used to clarify the clogging mechanism of the sewage pump. Firstly, the Hertz-Mindlin nonslip model was improved based on the linear cohesion model, and the textile model was established by using the CFD-DEM method. Then, the numerical model was applied to the sewage pump and compared with visualization experiments. The reliability of the model was verified by comparing the different rotational speeds and the size of textiles. Finally, the relationship between the speed, the size of textiles, and the number of textiles on the clogging mechanism and flow field characteristics of the sewage pump was explored. The study provides theoretical support for the development of sewage pumps resistant to flexible cloth-like materials. Future work could extend this framework to investigate multi-scale textile mixtures (e.g., combined fibers and large rags) and long-term wear effects caused by textile accumulation, which are critical for industrial applications requiring durability and adaptability to heterogeneous sewage compositions.