Modified Herschel–Bulkley–Papanastasiou model considering particle size distribution to debris flow rheological properties

Physics of Fluids, Год журнала: 2025, Номер 37(2)

Опубликована: Фев. 1, 2025

Debris flow, a typical non-Newtonian fluid, exhibits rheological behavior significantly influenced by particle size distribution. Traditional models often struggle with applicability and predictive accuracy in complex systems. This study proposes modified Herschel–Bulkley–Papanastasiou (HBP) model, incorporating distribution parameters to dynamically adjust yield stress shear viscosity, enhancing its describing debris flow under varying gradations. The model distinguishes the roles of fine coarse particles: particles reduce resistance through lubrication effects, while enhance viscosity via interlocking effects. To validate series experiments were conducted on 14 gradation conditions. Results showed HBP achieved fitting coefficients between 0.933 0.990, outperforming traditional demonstrating superior adaptability across different distributions. was further integrated into OpenFOAM framework for three-dimensional simulations flume experiment. These considered wall friction dynamic free surface changes. Comparative analysis physical revealed accurately captured behavior, dynamics, pressure field distributions channel bed In summary, overcomes limitations parameters, offering more precise versatile rheology. work provides robust theoretical numerical tool advancing prediction mitigation engineering applications.

Язык: Английский

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Topography-based and vectorized algorithm for extracting physical quantities in 3D-SPH form and its application in debris-flow entrainment modeling

Engineering Geology, Год журнала: 2024, Номер 340, С. 107693 - 107693

Опубликована: Авг. 22, 2024

Язык: Английский

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A discharge regulating method for the whole process of the debris flow dam failure

Landslides, Год журнала: 2025, Номер unknown

Опубликована: Янв. 11, 2025

Язык: Английский

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A new rainfall Intensity − Duration threshold curve for debris flows using comprehensive rainfall intensity

Engineering Geology, Год журнала: 2025, Номер unknown, С. 107949 - 107949

Опубликована: Фев. 1, 2025

Язык: Английский

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Numerical Investigation of Rockfall and Cascading Debris Flow Disasters Caused by Extreme Rainfall: A Case Study of Huashan Mountain in Jinan, China

Indian geotechnical journal, Год журнала: 2025, Номер unknown

Опубликована: Фев. 27, 2025

Язык: Английский

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Effects of bed pumice content on lahar erosion: An example from Changbaishan volcano, China

Engineering Geology, Год журнала: 2024, Номер 336, С. 107560 - 107560

Опубликована: Май 19, 2024

Язык: Английский

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Deciphering the dynamics of debris flows through basal stress responses in model experiments

Acta Geotechnica, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 24, 2024

Язык: Английский

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