Analysis of Flow Characteristics and Effects of Turbulence Models for the Butterfly Valve

Choi, Sung Woong; Seo, Hyoung-Seock; Kim, Han-Sang

doi:10.3390/app11146319

Cited by 8 publications

(2 citation statements)

References 34 publications

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“…This FLUENT is capable of simulating the complicated turbulent properties within mixing process of liquid and species with turbulent models. As a two‐equation turbulence model, the standard k − ε model in FLUENT has become the panacea of practical engineering flow simulation (Choi et al, 2021; Jaworski & Zakrzewska, 2002; Kositgittiwong et al, 2013; Liu et al, 2016; Noume et al, 2021; Papoutsis‐Kiachagias et al, 2014) since it was proposed by Launder and Spalding (Launder & Spalding, 1972), because it is robust, efficient, and adequately accurate for a wide range of turbulent flows, making itself frequently seen in industrial flow simulations. Therefore, the standard k − ε model was used in this study.…”

Section: Methodsmentioning

confidence: 99%

A novel design of in‐line static mixer for permanganate/bisulfite process: Numerical simulations and pilot‐scale testing

Han

Guan

Sun

et al. 2022

Water Environment Research

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An increasing number of chemical technologies to wipe out contaminants within an incredibly short period of time have been developed recently, while their application was always hindered by the inefficient or improper mixing of reactants. To address this issue, the present work proposed a new static mixer named Tai-Chi which consists of blade, fin, and spoiler elements. Tai-Chi mixer can slice and divert the solutions inside and generate high shear flow to promote mixing process. Numerical simulations helped to determine the optimal operating conditions for Tai-Chi mixer, including laying its components anterior to the injection nozzles and keeping the velocity rate ratio of main pipe to branch pipe within the range of 0.5 to 1. Numerical simulations further proved that Tai-Chi mixer could strike a great balance between mixing performance (coefficient of variation [CoV] reaches 0.1 within 5 to 7 pipe diameters downstream) and head loss (nearly a half of other high shear static mixer in the market). Data of pilot-scale testing by Tai-Chi mixer confirm that 80% sulfamethoxazole could be eliminated in permanganate/bisulfite process within 8 pipe diameters, as well as showed the superiority of Tai-Chi's mixing performance in early stage compared with other static mixers in the market. Practitioner Points• A Tai-Chi static mixer with blade, fin, and spoiler elements is devised.• The optimal condition of flow rate and installment of Tai-Chi mixer is determined.• Ultra-fast mixing is achieved by Tai-Chi (CoV < 0.1 within 5-7 pipe diameters).• Pilot-scale test verifies the mixing efficiency of Tai-Chi mixer.

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Section: Methodsmentioning

confidence: 99%

A novel design of in‐line static mixer for permanganate/bisulfite process: Numerical simulations and pilot‐scale testing

Han

Guan

Sun

et al. 2022

Water Environment Research

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show abstract

“…Tang et al [12,13] examined the flow characteristics of valves. In addition, Kim et al [14] assessed the impact of commonly used turbulence models on the flow characteristics of Processes 2022, 10, 1504 2 of 18 butterfly valves with various diameters. Qiu et al [15] used a multiphase cavitation model to investigate the pressure drop and cavitation characteristics of a sleeve-type control valve under various differential pressures and spool displacements.…”

Section: Introductionmentioning

confidence: 99%

Flow Characteristics Study of High-Parameter Multi-Stage Sleeve Control Valve

Sun,

Wu,

et al. 2022

Processes

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This study considers a multi-stage sleeve control valve with different opening degrees. The flow capacity of the numerical model is calculated using the actual working conditions of the control valve in a nuclear power plant as a baseline. A flow resistance test bench is then used to measure the flow capacity under each opening degree, and the flow characteristic curve is plotted to verify the accuracy of the numerical model. Based on CFX software simulations of different opening speeds, pressures, turbulent kinetic energy clouds, and set detection curves, analysis of the flow characteristics of the multi-stage sleeve valve with high parameters shows that, with an increase in the degree of opening, the valve speed will also increase. However, the speed at the socket orifice is slightly different, exhibiting a higher opening in the middle and lower openings on both sides. A maximum speed of 792.4 m/s is found in the 40% valve orifice. A maximum value of the turbulent kinetic energy of 1.4 × 10 4m2/s2 occurs in the throttle hole of the valve seat with an opening of 80%. The source of the aerodynamic noise is obtained in this study, which is of great significance to the decompression and noise reduction in multi-stage sleeve valves.

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Simulation and Analysis of the Internal Flow Field of Mining Solenoid Pilot Valve Based on Fluent

Wang,

Zhu,

Guo

et al. 2024

Lecture Notes in Mechanical Engineering

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During the commutation process, the electromagnetic pilot valve experiences turbulent kinetic energy dissipation, leading to unstable internal flow and generating noise in the valve. Based on computational fluid dynamics (CFD), the phenomena of impact and energy consumption in a new type of high-pressure and high-speed electromagnetic pilot valve were investigated. Then flow field simulations were conducted under various differential pressure and valve opening conditions, in order to obtain distribution maps of turbulent kinetic energy, pressure, and velocity. Finally, the simulation results were compared, and the results showed that increasing the outlet pressure and enlarging the valve port opening have a positive impact on mitigating the structural issues in the pilot valve.

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Analysis of Flow Characteristics and Effects of Turbulence Models for the Butterfly Valve

Cited by 8 publications

References 34 publications

A novel design of in‐line static mixer for permanganate/bisulfite process: Numerical simulations and pilot‐scale testing

A novel design of in‐line static mixer for permanganate/bisulfite process: Numerical simulations and pilot‐scale testing

Flow Characteristics Study of High-Parameter Multi-Stage Sleeve Control Valve

Simulation and Analysis of the Internal Flow Field of Mining Solenoid Pilot Valve Based on Fluent

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