Superior cubic channel section and analytical solution of best hydraulic properties

Han, Yan-Cheng; Easa, Said M.

doi:10.1016/j.flowmeasinst.2016.06.019

Cited by 15 publications

(6 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The new sections included polygonal section by Kurbanov and Khanov [23], trapezoidal-rectangular section by Abdulrahman [24], parabolic sides with horizontal bottom (HB) by Das [25], trapezoidal section with round corners by Froehlich [26], and two-segment parabolic sides with HB by Easa [27]. These sections have subsequently inspired the development of more new sections (2010-2018), such as semi-regular polygon by Vatankhah [28], multiple-segment linear sides by Easa [29], standard elliptic sides by Easa and Vatankhah [30], general elliptic side by Easa [31], and cubic and power-law (PL) sections by Han and Easa [32,33]. As noted, the trend of recent advances in section shape has been to introduce additional linear or curved elements, such as HB and round bottom corners, to improve discharge (flow rate) and maintenance.…”

Section: Section Familymentioning

confidence: 99%

New Compound Open Channel Section with Polynomial Sides: Improving Cost and Aesthetics

Easa

Han

2019

Water

Self Cite

View full text Add to dashboard Cite

Previous research on compound trapezoidal cross sections has mainly focused on improving the prediction of the discharge (flow rate) because of its inherent challenges. This paper focuses on two other important aspects: Section shape and optimal construction cost. First, the paper proposes a new compound section with third-degree polynomial sides of main channel with horizontal bottom (HB) that allows its top corners to be smooth, called herein compound polynomial section. The special cases of this versatile section include the simple polynomial section, polygonal section, trapezoidal-rectangular section, two-segment linear-side section, and parabolic bottom-trapezoidal section. The simple polynomial section, which is the bank-full part of the compound polynomial section, can further produce parabolic (with or without HB), trapezoidal, rectangular, and triangular sections. Second, an optimization model that minimizes construction cost (excavation and lining) of the compound (or simple) polynomial section is developed. The model includes discharge and physical constraints. Theoretical and empirical methods of discharge prediction were used in the model. The results show that the simple polynomial section was more economical than the popular parabolic section by up to 8.6% when the side slopes were restricted. The new polynomial-based sections not only reduced construction cost, but also improved maintenance and aesthetics. As such, the new sections should be of interest to researchers and practitioners in hydraulic engineering.

show abstract

Section: Section Familymentioning

confidence: 99%

New Compound Open Channel Section with Polynomial Sides: Improving Cost and Aesthetics

Easa

Han

2019

Water

Self Cite

View full text Add to dashboard Cite

show abstract

“…The designs, which focus on experimental studies of problems of hydrodynamics are fairly well covered in the scientific literature. The research into fluid motion through the cubic, semi-cubic, trapezoidal, parabolic channels [16] prove significant influence of the shape of channel, washing perimeter, and equivalent diameter on the consumption and speed of fluid. It was proven that the cubic section has the lowest hydraulic resistance, which reduces energy expenses for the process.…”

Section: исследована гидродинамика фильтрации газового потока через сmentioning

confidence: 99%

“…This leads to intensification of heat exchanging processes. Along with this, the existing methods of research of hydrodynamics [16][17] do not consider the motion of gas medium through the formed layer of particles of regular shape.…”

Section: исследована гидродинамика фильтрации газового потока через сmentioning

confidence: 99%

Selection of optimal method of forming a layer of candied fruits during filtration drying

Atamanyuk

Huzova

Gnativ

et al. 2016

EEJET

View full text Add to dashboard Cite

“…Vatankhah [9] considered the relationship between the specific energy of a parabolic channel section and its depth and obtained the subcritical and supercritical depths analytically by solving a quartic equation. Han [10,11] used a complex function method and the undetermined Lagrange multiplier optimization algorithm to derive a theoretical solution for the hydraulic optimal section of a cubic parabola. Through a comparison, it was shown that the hydraulic performance of the cubic parabolic section was the best.…”

Section: Introductionmentioning

confidence: 99%

Research on the Comprehensive Optimization of the Hydraulic Performance and Frost-Heaving Resistance of a Parabolic Channel

Yang

Wang

et al. 2020

Water

View full text Add to dashboard Cite

Hydraulic performance and frost-heaving resistance should be considered simultaneously in the channel design of seasonally frozen soil areas. Quadratic parabolic channels have good water and sand transport capacities and high frost-heaving resistances. The width–depth ratio of a parabola determines its section structural form, which in turn determines the hydraulic performance and frost-heaving resistance. In this research, based on the current lack of a comprehensive optimization method that accounts for the hydraulic performance and frost-heaving resistance of the cross-section structures of parabolic channels, a multi-objective optimization model was established with the goal of achieving a minimum cross-sectional flow area and a uniform channel section force. Taking the flow velocity, the width–depth ratio and the crack resistance of concrete lining plate as constraints, the α method of the linear weighted sum method was used to optimize the calculation, and the comprehensive optimal quadratic parabolic channel section was obtained. The comprehensive optimal section of an actual parabolic channel in the Shijin Irrigation District was determined using this method, and the comprehensive optimal section was analyzed and compared to the original design section and two typical parabolic channel sections. The comprehensive optimal section was compared with the original design section in the Shijin Irrigation District. The force uniformity of the optimal section was 23.2% better, the hydraulic performance was 1.96% better, and the land use was 12.35% less. Compared with the values for the hydraulic optimal section, the maximum positive and negative bending moments of the comprehensive optimal section decreased by 5.6% and 11.89%, respectively, and the force uniformity increased by 7.62%. Additionally, compared with the values for the practical economic section, the force uniformity and the hydraulic performance of the comprehensive optimal section increased by 1.79% and 0.2%, respectively, and the land use decreased by 4.49%. Thus, the comprehensive optimal section met the engineering requirements and it could provide a reference for the design and selection of parabolic channels in seasonally frozen soil areas.

show abstract

Superior cubic channel section and analytical solution of best hydraulic properties

Cited by 15 publications

References 11 publications

New Compound Open Channel Section with Polynomial Sides: Improving Cost and Aesthetics

New Compound Open Channel Section with Polynomial Sides: Improving Cost and Aesthetics

Selection of optimal method of forming a layer of candied fruits during filtration drying

Research on the Comprehensive Optimization of the Hydraulic Performance and Frost-Heaving Resistance of a Parabolic Channel

Contact Info

Product

Resources

About