磷素对含沙水流流体变异特性影响

张元元; 高建恩; 李文证; 高哲; 王照润; 王鹭

doi:10.13870/j.cnki.stbcxb.2024.01.016

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磷素对含沙水流流体变异特性影响

更新时间：2025-03-12

- 磷素对含沙水流流体变异特性影响
- Influence of Phosphorus on the Fluid Variability Characteristics of Sediment-laden Flow
- 水土保持学报 2024年38卷第1期页码：22-30
- 作者机构：
  
  1. 中国科学院教育部水土保持与生态环境研究中心, 陕西杨陵,712100
  2. 中国科学院水利部水土保持研究所, 陕西杨陵,712100
  3. 中国科学院大学,北京,100049
  4. 水利部水土保持生态工程技术研究中心, 陕西杨陵,712100
  5. 西北农林科技大学水土保持研究所, 陕西杨陵,712100
  6. 西北林科技大学水利与建筑工程学院, 陕西杨陵,712100
- 作者简介：
  
  [ "张元元(1993—),女,博士,主要从事流域水环境研究。E-mail:yuanyuan2567@163.com" ]
- 基金信息：
  
  国家重点研发计划项目(2021YFD1900700,2017YFC0504703);陕西省重点研发计划项目(2020ZDLSF06-03-01);国家自然科学基金项目(41877078,41371276)
- DOI：10.13870/j.cnki.stbcxb.2024.01.016
  中图分类号： S157.1
- 纸质出版：2024
- 稿件说明：
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张元元, 高建恩, 李文证, 等. 磷素对含沙水流流体变异特性影响[J]. 水土保持学报, 2024,38(1):22-30.

ZHANG Yuanyuan, GAO Jian'en, LI Wenzheng, et al. Influence of Phosphorus on the Fluid Variability Characteristics of Sediment-laden Flow[J]. 2024, 38(1): 22-30.
张元元, 高建恩, 李文证, 等. 磷素对含沙水流流体变异特性影响[J]. 水土保持学报, 2024,38(1):22-30. DOI： 10.13870/j.cnki.stbcxb.2024.01.016.

ZHANG Yuanyuan, GAO Jian'en, LI Wenzheng, et al. Influence of Phosphorus on the Fluid Variability Characteristics of Sediment-laden Flow[J]. 2024, 38(1): 22-30. DOI： 10.13870/j.cnki.stbcxb.2024.01.016.

摘要

[目的] 为探明磷素对含沙水流流体变异特性的影响。[方法] 采用自制双竖管流变仪

研究了磷素对不同浓度含沙水流流体类型、流变参数及流体发生变异的临界阈值的影响。[结果] (1)磷素浓度、泥沙浓度及泥沙理化性质是影响含沙水流发生流体变异的主要因素。在25 ℃下

过磷酸钙浓度每增加0.1 g/cm3

黏滞系数和宾汉极限剪切力分别增加0.48~1.47 mPa·s和3.49~6.84 N/m2。(2)随着磷素和泥沙含量的增大

含磷素的含沙水流由牛顿流体变异为宾汉流体。构建并验证了磷-泥沙水流黏滞系数和宾汉极限剪切力等流变参数的计算模型。(3)给出了磷-泥沙水流流体变异的临界浓度阈值。当磷素浓度从0增加至0.45 g/cm3时

含沙水流的流体变异临界浓度阈值降低49%

说明磷素的存在加速了含沙水流的流体变异。[结论] 磷素的增加使得侵蚀水流更容易由牛顿流体变异为宾汉流体

从而影响侵蚀流内部的能量耗散过程

研究结果为深入认识侵蚀污染水流的输移机制提供了新的科学基础。

Abstract

[Objective] This study aims to explore the effect of phosphorus on the fluid variability characteristics of sediment-laden flows. [Methods] A self-made double vertical tube rheometer was used to study the influence of phosphorus on fluid types

rheological parameters

and the critical threshold of fluid variation in sediment-laden flows with different concentrations. [Results] (1) Phosphorus concentration

sediment concentration

and physical and chemical properties of sediment were the main factors influencing the fluid variability in sediment-laden flows. At 25 ℃

the viscosity coefficient and Bingham yield stress increased by 0.48~1.47 mPa·s and 3.49~6.84 N/m2

respectively

with an increase of 0.1 g/cm3 in calcium superphosphate concentration. (2) With the increase of phosphorus and sediment content

phosphorus-laden sediment-laden flows transitioned from Newtonian fluid to Bingham fluid. A computational model was developed and validated to calculate rheological parameters such as viscosity coefficient and Bingham yield stress. (3) The critical concentration threshold for the fluid variability of phosphorus-sediment-laden flows was given. When phosphorus concentration increased from 0 to 0.45 g/cm3

the critical concentration threshold for fluid variability in sediment-laden flows decreased by 49%

indicating that the presence of phosphorus accelerated the fluid variability of sediment-laden flows. Therefore

the increase of phosphorus promoted the process of erosion water flow from Newtonian fluid to Bingham fluid

which affected the energy dissipation process in the erosion flow. [Conclusion] The research findings provide a new scientific basis for in-depth understanding of the transport mechanism of erosive polluted water flows.

关键词

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references

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