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Simulation of the flow characteristics of a drip irrigation emitter with large eddy methods

Dan Wu, Yun-kai Li, Hai-sheng Liu, Pei-ling Yang, Hao-su Sun, Yao-ze Liu
2013 Mathematical and computer modelling  
In this paper, the standard k-ε model and the Large Eddy Simulation method (LES) were applied to analyze the flow characteristic in the drip irrigation emitter.  ...  The results showed that the LES model was more effective to simulate the flow characteristics in the flow path of drip irrigation emitters.  ...  , and the National Natural Science Fund of China (NSFC)(No. 50379053, No. 50609029).  ... 
doi:10.1016/j.mcm.2011.10.074 fatcat:7bsbnntzk5dlbaduiydxc5sxti

Research on Hydraulic Properties and Energy Dissipation Mechanism of the Novel Water-Retaining Labyrinth Channel Emitters

Yanfei Li, Xianying Feng, Yandong Liu, Xingchang Han, Haiyang Liu, Yitian Sun, Hui Li, Yining Xie
2022 Agronomy  
As a key component of a drip irrigation system, the performance of the drip irrigation emitters is mainly determined by the flow channel structures and structural parameters.  ...  The internal flow characteristics and energy dissipation mechanism were analyzed by a computational fluid dynamics (CFD) simulation.  ...  Data Availability Statement: The study did not report any data. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/agronomy12071708 fatcat:mk2gghzaqfgopowyh45wdb4cyu

Analysis of Flow Channel Structure Parameter and Optimization Study on Tooth Spacing of Drip Irrigation Tape

Weiting Zhang, Luhua Yang, Jinyi Wang, Xinhua Zhang
2022 Water  
Then, computational fluid dynamics (CFD) was used to simulate the flow characteristics of the emitters in the three plans.  ...  Proper exploring of the performance-related but hard-to-measure structure parameters in the flow channel emitter of drip irrigation tape is imperative.  ...  As the core component of the drip irrigation system, the drip irrigation emitters' working performance largely affects the irrigation quality.  ... 
doi:10.3390/w14111694 doaj:12556a6731924ae490befd2d3a17102b fatcat:rkhiro7vkrdgnjjv674k4xdoi4

Measurement and Prediction of Total Friction Losses in Drip Irrigation Laterals with Cylindrical Integrated in-line Drip Emitters using CFD Analysis Method

Vedat Demir, Hüseyin Yürdem, Arzu Yazgı, Tuncay Günhan
2019 Journal of Agricultural Sciences  
The objective of this study was to predict total friction losses in drip irrigation laterals with cylindrical integrated inline emitters at different spacing using Computational Fluid Dynamics (CFD) simulation  ...  ABSTRACT The objective of this study was to predict total friction losses in drip irrigation latera emitters at different spacing using Computational Fluid Dynamics (CFD) simulation m laterals with different  ...  39.78 31.58 0.33, 0.50, 0.75 Table 2 - 2 Properties of the drip emitter and pipe flow characteristics Type of drip emitter Properties of drip emitter Pipe flow characteristics ** Drip emitter  ... 
doi:10.15832/ankutbd.433830 fatcat:fdzo732bnnbhzohucal5dvdecu

Multi-component Lattice Boltzmann simulation of the hydrodynamics in drip emitters

Giacomo Falcucci, Vesselin K. Krastev, Chiara Biscarini
2017 Journal of Agricultural Engineering  
In this paper, we propose a fast and efficient numerical technique based on the Lattice Boltzmann method (LBM) to model the flow through a reference drip emitter geometry.  ...  Results for the water flow through a rectangular drip emitter are in good agreement with literature numerical and experimental data.  ...  Wu et al. (2013) analyse the effectiveness of the standard k-ε model and the large eddy simulation (LES) method in simulating the fluid dynamics inside drip irrigation emitters and concluded that the  ... 
doi:10.4081/jae.2017.649 fatcat:aaqjiuummzbh3he7emnyz7vake

Study on Fluid Movement Characteristics inside the Emitter Flow Path of Drip Irrigation System Using the Yellow River Water

Ji Feng, Weinan Wang, Haisheng Liu
2020 Sustainability  
simulation turbulence model for the flow field in the flow path of the emitter was determined by comparing the macroscopic hydraulic characteristics with the microscopic fluid motion characteristics of  ...  In order to clarify the fluid movement characteristics inside the flow path of the emitter under complicated water quality conditions in a drip irrigation system using the Yellow River Water, the optimal  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/su12041319 fatcat:3mh6lzcyqzasvh3ldvmoojv5ui

Visualizing the macroscale spatial distributions of biofilms in complex flow channels using industrial computed tomography

Yang Xiao, Barbara Sawicka, Yaoze Liu, Bo Zhou, Peng Hou, Yunkai Li
2020 Figshare  
To address this concern, a combination of industrial computed tomography (ICT) and a contrast agent was explored to noninvasively visualize biofilms in three types of drip irrigation emitters.  ...  The complex hydrodynamic characteristics in the emitter channels affected the local distributions of biofilms.  ...  Sw are the generalized source terms of momentum conservation equation. (2) Turbulence model The large eddy simulation method (LES) was selected as the turbulence model, and the continuity equation is  ... 
doi:10.6084/m9.figshare.11889912 fatcat:bdwx7xpr7ngl7evnh5jormzm4i

Evaluation of crop coefficients, water productivity, and water balance components for wine grapes irrigated at different deficit levels by a sub-surface drip

V. Phogat, M.A. Skewes, M.G. McCarthy, J.W. Cox, J. Šimůnek, P.R. Petrie
2017 Agricultural Water Management  
This investigation was conducted to estimate the water balance and ET components of subsurface drip (SDI) irrigated Chardonnay wine grapes for two seasons (2010-2011 and 2011-2012) using a numerical model  ...  The mean value of actual crop coefficient (K cact ) estimated by HYDRUS-2D simulated ET C act over the two seasons was 0.27, which matched with other investigations.  ...  Acknowledgements The work was conducted by the South Australian Research and Development Institute, a member of the Wine Innovation Cluster at the Waite Precinct in Adelaide, and is supported by Australian  ... 
doi:10.1016/j.agwat.2016.10.016 fatcat:vdfp6umjvvgenhdu2g6locvve4

Estimating Evapotranspiration of an Apple Orchard Using a Remote Sensing-Based Soil Water Balance

Magali Odi-Lara, Isidro Campos, Christopher Neale, Samuel Ortega-Farías, Carlos Poblete-Echeverría, Claudio Balbontín, Alfonso Calera
2016 Remote Sensing  
The main goal of this research was to estimate the actual evapotranspiration (ET c ) of a drip-irrigated apple orchard located in the semi-arid region of Talca Valley (Chile) using a remote sensing-based  ...  In this context, the main objective of this study is to determine the evapotranspiration and irrigation requirements of a drip-irrigated apple orchard using a one-layer satellite-based soil water balance  ...  The irrigation system was a surface drip with 4 emitters per tree (4 L·h −1 per emitter). There were double pipelines per tree row, one on each side of the trunk.  ... 
doi:10.3390/rs8030253 fatcat:4wwina7fubhabbjc56jqxsidze

Effect of Drip Irrigation on Soil Water Balance and Water Use Efficiency of Maize in Northwest China

Yahui Wang, Sien Li, Yaokui Cui, Shujing Qin, Hui Guo, Danni Yang, Chunyu Wang
2021 Water  
by two eddy covariance systems, micro-lysimeters, the packaged stem sap flow gauges and CS616 sensors during 2014–2018 growing seasons.  ...  Drip irrigation (DI) has been widely utilized for crops and its water-saving effect has been confirmed by numerous studies.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/w13020217 fatcat:7iaalkn42fcw3kv3kz5gh74cju

Effects of Water and Fertilizer Flow Rates on the Mixing Process and Fertilization Uniformity of Cotton under Mulch Drip Irrigation

Xiao Ma, Lixin Zhang, Changxin Fu, Wendong Wang, Yongchun Yan
2022 Water  
In the irrigation system with a main pipe diameter of 100 mm and a fertilizer injection pipe diameter of 20 mm, the water fertilizer flow rate ratio should be between 3–8 to ensure the effect of the mixing  ...  Water and fertilizer flow rates are the most convenient variable to control in the process of drip irrigation under mulch.  ...  Acknowledgments: Thanks to the financial support of the National Natural Science Foundation of China. Conflicts of Interest: The authors declare no conflict of interest. Water 2022, 14, 1952  ... 
doi:10.3390/w14121952 fatcat:vi6pdbkxabcazazybo6loowf2y

Spatial and diurnal below canopy evaporation in a desert vineyard: Measurements and modeling

D. Kool, A. Ben-Gal, N. Agam, J. Šimůnek, J. L. Heitman, T. J. Sauer, N. Lazarovitch
2014 Water Resources Research  
Potential and actual E below the canopy were highly variable, both diurnally and with distance from the vine-row, as a result of shading and distinct wetted areas typical to drip irrigation.  ...  The objectives of this research were to quantify E in an isolated, drip-irrigated vineyard in an arid environment and to simulate below canopy E using the HYDRUS (2-D/3-D) model.  ...  This includes operational parameters such as drip emitter distance, mulching, emitter depth, and irrigation scheduling.  ... 
doi:10.1002/2014wr015409 fatcat:humapfkjqvdxhpxp75ai344byy

Impact of Drought and Changing Water Sources on Water Use and Soil Salinity of Almond and Pistachio Orchards: 2. Modeling

Sarah A. Helalia, Ray G. Anderson, Todd H. Skaggs, Jirka Šimůnek
2021 Soil Systems  
The manuscript presents a comparison of three-year experimental and numerically simulated root zone salinities in and below the root zone of almond and pistachio drip-irrigated orchards at multiple locations  ...  in the San Joaquin Valley (SJV), California, with different meteorological characteristics.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/soilsystems5040058 fatcat:qwa3rsqkkfbr5dog7grmjhdwxq

The Study on Internal Flow Characteristics of Disc Filter under Different Working Condition

Yanbing Chi, Peiling Yang, Zixuan Ma, Haiying Wang, Yuxuan Liu, Bingbing Jiang, Zongguang Hu
2021 Applied Sciences  
The middle of the filter element appeared in a high-pressure area and demonstrated the highest head loss, which may be the main flow area of the DF, and the inner flow characteristics of the DF were consistent  ...  In addition, we attempted to simulate the filter operation process with computational fluid dynamics, based on two aspects—a macroscopic model and a simplified model.  ...  Most researchers have used CFD on drip emitters [8, 9] , water pumps [10] , and other equipment in agricultural irrigation systems.  ... 
doi:10.3390/app11167715 fatcat:vbot7ct5kjdjrfjwum37xvcf4i

Estimating Evapotranspiration of Processing Tomato under Plastic Mulch Using the SIMDualKc Model

Huimeng Zhang, Guanhua Huang, Xu Xu, Yunwu Xiong, Quanzhong Huang
2018 Water  
The results showed a good agreement between soil water observations and simulations throughout the growing seasons with a low error estimate and high model efficiency.  ...  ET during the two growing seasons was in the range of 284–331 mm for basin irrigation and 266–310 mm for drip irrigation.  ...  Acknowledgments: We are grateful to the editors and two anonymous reviewers for their constructive critiques on a previous version of this manuscript.  ... 
doi:10.3390/w10081088 fatcat:2qwidr2f7bggxbtrxf6aswkfe4
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