Development of Correlations for Critical Tractive Force Estimation using Two-Phase Flow Analysis in Sewer Conduit

송, 양호; 유, 재연; 공, 수창; 이, 정호

doi:10.9798/kosham.2017.17.5.311

Cited by 2 publications

(2 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…관로 내부에서 고체 입자를 운반할 수 있는 힘은 전단응력 (Shear stress)을 기반으로 추정하며 원활하게 이송시키는 힘을 소류력(Tractive force)이라고 정의한다 (Song et al, 2017). 소류 력 이상의 힘이 관거 내부에 존재할 때 한계소류력에 의한 자가세척(Self-cleansing)이 발생한다 (Ji et al, 2020).…”

unclassified

“…Result of Critical Tractive Force for Two-Phase Flow in Conduit(Song et al, 2017) 3.3 토사와 혼재된 흐름의 유속 검토 일반적인 관내 흐름의 경우 단일유속의 형태로 간주한다. 실무에서 활용중인 Storm Water Management Model 모형을 비롯한 강우-유출 해석모형들의 경우 관내 평균유속을 통해 관의 적정 설계 및 범람에 대한 모의를 하게 된다.…”

unclassified

See 1 more Smart Citation

Improving the Minimum Design Velocity of Sewage Pipes

Song¹,

Lee²,

Lee³

2021

J. Korean Soc. Hazard Mitig

Self Cite

View full text Add to dashboard Cite

The minimum design velocity for sewage pipes is set based on the planned quantity; however, deriving a reasonable design with only a single standard is limited. Thus, it is necessary to review whether consistent standards, such as the current minimum flow velocity, can efficiently transport the particles flowing in pipes. Improving the design that can determine the minimum design velocity rate and slope according to the concentration, specific gravity, particle size, and characteristics of the pipe material of the sediment flowing into the sewer system is necessary. In this study, the minimum design velocity for each particle size was examined based on the results of the simulation of fluid-solid multiphase flow required for the review process of hydraulic properties inside the pipe. The minimum design velocity standards for domestic and international sewage systems were investigated and compared, and a minimum design flow rate prediction equation was proposed considering the sedimentation. The equation includes the relationship between the particle size and pipe diameter and can be easily estimated.

show abstract

unclassified

Improving the Minimum Design Velocity of Sewage Pipes

Song¹,

Lee²,

Lee³

2021

J. Korean Soc. Hazard Mitig

Self Cite

View full text Add to dashboard Cite

show abstract

Review of Turbulent Shear Boundary Layer by Soil Slurry Transfer in Pipe

Song¹,

Yun²,

Lee³

2018

J. Korean Soc. Hazard Mitig

Self Cite

View full text Add to dashboard Cite

In the classification of the slurry transportation processes, sediment has been mostly classified as suspended sediment flowing with fluid or sediment sank to the bottom of riverbed, though there have been few cases of clarifying the boundary of the two phenomena. A boundary layer is a major factor in determining the capability of transferring sediment. In case of discharges flowed into sewer pipes, most of them flow into as a mixture fluid and soil slurry based on the occurrence of rainfall, and show characteristics of turbulent flows. In this study, an analysis model capable of predicting soil slurry flows within actual sewer pipes based on a numerical analysis model, and proposed a method of estimating boundary layers in the sediment flow. To verify the analysis model, the volume fractions in the pipes were compared based on cases of similar studies. To review the process of transferring sediment, the velocity field and volume fraction by flow conditions including slurry inside of pipes was studied. Based on the result, criteria on the formation of a shear boundary layer were expressed as for figural style by using shear velocity rates and settling velocity rate of particles in pipes.

show abstract

Development of Correlations for Critical Tractive Force Estimation using Two-Phase Flow Analysis in Sewer Conduit

Cited by 2 publications

References 27 publications

Improving the Minimum Design Velocity of Sewage Pipes

Improving the Minimum Design Velocity of Sewage Pipes

Review of Turbulent Shear Boundary Layer by Soil Slurry Transfer in Pipe

Contact Info

Product

Resources

About