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Journal articles on the topic 'Keywords- Open channel flow parameters'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Ebissa, G. K. Dr. K. S. Hari Prasad. "Estimation of open channel flow parameters by using optimization techniques." INTERNATIONAL JOURNAL OF ENGINEERING DEVELOPMENT AND RESEARCH Volume 5 | Issue 2 | May 2017, Volume 5 | Issue 2 | May 2017 (2017): Page Number(s) — 1049–1073. https://doi.org/10.5281/zenodo.583720.

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Open channel flow parameter estimation is an inverse problem, which involves the prediction of a function within a domain, given an error criterion with respect to a set of observed data. Various numerical methods have been developed to estimate open channel flow parameters. For this study, Genetic Algorithm optimization technique is selected. Because of its inherent characteristics, Genetic Algorithm optimization technique avoids the subjectivity, long computation time and ill-posedness often associated with conventional optimization techniques. The present study involves estimation of open c

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2

Lakshmanan, Susithra, Gareth Pender, Heather Haynes, and William Holmes. "Characterization of flow transport within pore spaces of an open-work gravel bed." International Journal of Engineering & Technology 3, no. 4 (2014): 457. http://dx.doi.org/10.14419/ijet.v3i4.3430.

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Analysis of the flow dynamics within the near-bed and sub-surface regions of river bed sediment is critical in understanding fluid exchange and related chemical transfer/reactions. The knowledge in above is limited as these regions are difficult to measure using traditional instrumentation methods. In this paper, we tried the use of Magnetic Resonance Imaging (MRI) technique to non-invasively image flow dynamics of simulated river bed. We developed a bespoke MRI-compatible open-channel flume in order to acquire real-time flow images from within the MRI bore and used contrast agent (Gd-DTPA) as

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3

Beldring, S., K. Engeland, L. A. Roald, N. R. Sælthun, and A. Voksø. "Estimation of parameters in a distributed precipitation-runoff model for Norway." Hydrology and Earth System Sciences 7, no. 3 (2003): 304–16. http://dx.doi.org/10.5194/hess-7-304-2003.

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Abstract. A distributed version of the HBV-model using 1 km2 grid cells and daily time step was used to simulate runoff from the entire land surface of Norway for the period 1961-1990. The model was sensitive to changes in small scale properties of the land surface and the climatic input data, through explicit representation of differences between model elements, and by implicit consideration of sub-grid variations in moisture status. A geographically transferable set of model parameters was determined by a multi-criteria calibration strategy, which simultaneously minimised the residuals betwe

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4

Oleynyk, O., Yu Otrosh, N. RASHKEVICH, and S. Shapoval. "SIMULATION OF A POSSIBLE SMOKING ZONE IN A DESTROYED SHELTER." Municipal economy of cities 4, no. 178 (2023): 210–18. http://dx.doi.org/10.33042/2522-1809-2023-4-178-210-218.

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The purpose of the presented work is to create a model for calculating the process of the spread of dangerous fire factors and determining the effectiveness of various engineering and technical, organizational measures and means aimed at increasing the duration of people's stay in a civil defense building in the conditions of hostilities. The authors of the work conducted an analysis of scientific research in areas such as "Modeling of fire and analysis of smoke propagation at metro stations in different fire locations" and "Modeling of flame and smoke propagation in an underground garage unde

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5

Abida, Habib. "Identification of compound channel flow parameters." Journal of Hydrology and Hydromechanics 57, no. 3 (2009): 172–81. http://dx.doi.org/10.2478/v10098-009-0016-y.

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Identification of compound channel flow parametersOptimization methods are used to estimate parameters required for routing floods through open compound channels. Besides initial and boundary flow conditions, data required especially include, cross-sectional area (A) of flow and conveyance (K) as functions of flow depth (y) for a representative cross-section of the study reach. Thus, instead of optimizing upon channel's geometric and hydraulic parameters, optimization is performed upon non-physical parameters in assumedA(y) andK(y) relationships. The optimization method selected for this appli

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HIRANO, Muneo, Haruyuki HASHIMOTO, Akira FUKUTOMI, Kouji TAGUMA, and Muh Saleh PALLU. "Nondimensional Parameters Governing Hyperconcentrated Flow in a Open Channel." PROCEEDINGS OF HYDRAULIC ENGINEERING 36 (1992): 221–26. http://dx.doi.org/10.2208/prohe.36.221.

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7

Gadissa, Ebissa, and Asirat Teshome. "Estimation of Open Channel Flow Parameters by Using Genetic Algorithm." Open Journal of Optimization 07, no. 03 (2018): 51–64. http://dx.doi.org/10.4236/ojop.2018.73003.

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8

Venherskyi, Petro, and Yaryna Kokovska. "INVESTIGATION OF THE STABILITY FOR ESTABLISHED FLOWS IN OPEN PSEUDOPRISMATIC CHANNELS." EUREKA: Physics and Engineering 5 (September 30, 2016): 9–15. http://dx.doi.org/10.21303/2461-4262.2016.00151.

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In this article the equations of channel flow of fluid are considered. They are described by the continuity equation and the momentum equation depending on the rate of flow and cross-sectional area of flow. It is shown that natural phenomena significantly affect the flow stability and received a condition that ensures the stability of unstated flow at perturbation in initial and boundary conditions. Conditions of stability are checked on test examples, which depend on the following parameters: established movement parameters and middle and bottom slope angles. It is shown that in such assumpti

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Deng, Zhijun, Baozhu Li, Shuang Xing, Chen Zhao, and Haijiang Wang. "Experimental Investigation on the Anode Flow Field Design for an Air-Cooled Open-Cathode Proton Exchange Membrane Fuel Cell." Membranes 12, no. 11 (2022): 1069. http://dx.doi.org/10.3390/membranes12111069.

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A flow channel structure design plays a significant role in an open-cathode proton exchange membrane fuel cell. The cell performance is sensitive to the structural parameters of the flow field, which mainly affects the heat and mass transfer between membrane electrode assembly and channel. This paper presents theoretical and experimental studies to investigate the impacts of anode flow field parameters (numbers of the serpentine channels, depths, and widths of the anode channel) on cell performance and temperature characteristics. The result indicates that the number of anode serpentine channe

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10

Gubashi, Karim R. "Using Hydraulic Parameters to Estimate Longitudinal Dispersion Coefficient in Open Channel." Tikrit Journal of Engineering Sciences 16, no. 1 (2009): 42–62. http://dx.doi.org/10.25130/tjes.16.1.04.

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A comparative analysis of previous theoretical and empirical equations is applied to evaluate their behavior in predicting dispersion coefficient in open channel. A new simplified method for predicting dispersion coefficients using hydraulic parameters is developed. A nonlinear multiple regression method is prepared to derive a new equation of dispersion coefficient. This equation is proven to be superior in explaining dispersion coefficient of open channel more precisely, as compared to existing equations. Keywords: Longitudinal dispersion, hydraulic parameters, dispersion coefficients.

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11

Nysanov, E. A., Zh S. Kemelbekova, O. M. Ibragimov, A. E. Kozhabekova, and М. Оsman. "CALCULATION OF TWO-SPEED FLOW OF TWO-PHASE OPEN FLOW." NEWS of National Academy of Sciences of the Republic of Kazakhstan 6, no. 444 (2020): 203–12. http://dx.doi.org/10.32014/2020.2518-170x.148.

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In this article the mathematical model of unsteady flow the two-phase open stream taking into account the redistribution of the particulate concentration, the depth of flow and water filtration on the bottom of the channel, and also created an efficient method of calculation. In this case, the two-speed flow is considered, i.e. the presence of the longitudinal and vertical components of the phase velocities is taken into account, and we also believe that the flow parameters along the flow do not change. Initial and boundary conditions are established based on theoretical and empirical formulas

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12

Patton, J. S., C. E. Brennen, and R. H. Sabersky. "Shear Flows of Rapidly Flowing Granular Materials." Journal of Applied Mechanics 54, no. 4 (1987): 801–5. http://dx.doi.org/10.1115/1.3173120.

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Shear flows of granular materials are studied in an open channel. The wall shear is calculated from an open channel momentum equation which includes the density variations in the flow. An experimental technique was developed that allowed the measurement of the average density of the flow at different longitudinal locations in the channel. Two sizes of glass beads are examined and results show the variations in the wall shear as a function of various dimensionless parameters.

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13

Sayed, Tarek. "An experimental study of branching flow in open channels." Limnological Review 19, no. 2 (2019): 93–101. http://dx.doi.org/10.2478/limre-2019-0008.

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Abstract Branching channel flow describes any side water withdrawals from rivers or main channels. Branching channels have widespread application in many practical projects, such as irrigation and drainage network systems, water and waste-water treatment plants, and many water resources projects. Therefore, in this research, a comprehensive analysis of laboratory data has been carried out to discover the best angle of branching. The study also aims to introduce simple, practical equations to help engineers of water resources to fix the percentage of discharge diverted to the branch channel. Th

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14

Stanilov, Alexander, Iskra Simova, Rositsa Velichkova, Elitsa Gieva, and Rangel Sharkov. "Open channel velocity field investigation for hydrokinetic power generation." E3S Web of Conferences 551 (2024): 02012. http://dx.doi.org/10.1051/e3sconf/202455102012.

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The paper presents an experimental study of a velocity field in an open channel. The study of water flow in an open channel is complicated due to the influence of various factors and different variables. Some of the variables affecting the flow parameters include the height of the water column, the width of the channel, the length of the channel, the slope of the channel, and the conditions of the channel bed. The investigated open channel is used for experimental research of kinetic turbines, and the flow speed in the channel is in the range of 0.1-0.3 m/s. The low velocity values in the chan

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Williams, Priscilla, Vesselina Roussinova, and Ram Balachandar. "Turbulence structure of non-uniform rough open channel flow." E3S Web of Conferences 40 (2018): 05039. http://dx.doi.org/10.1051/e3sconf/20184005039.

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This paper focuses on the turbulence structure in a non-uniform, gradually varied, sub-critical open channel flow (OCF) on a rough bed. The flow field is analysed under accelerating, near-uniform and decelerating conditions. Information for the flow and turbulence parameters was obtained at multiple sections and planes using two different techniques: two-component laser Doppler velocimetry (LDV) and particle image velocimetry (PIV). Different outer region velocity scaling methods were explored for evaluation of the local friction velocity. Analysis of the mean velocity profiles showed that the

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16

Ramamurthy, A. S., Junying Qu, and Diep Vo. "Volume of fluid model for an open channel flow problem." Canadian Journal of Civil Engineering 32, no. 5 (2005): 996–1001. http://dx.doi.org/10.1139/l05-038.

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In the past, the solutions to open flow problems were generally found on the basis of experimental data or through the development of theoretical expressions using simplified assumptions. The volume of fluid (VOF) turbulence model can be applied to obtain the flow parameters such as pressure head distributions, velocity distributions, and water surface profiles for flow in open channels. The free overfall in a rectangular open channel that serves as a discharge measuring structure is selected to apply to the VOF model. The predictions of the proposed VOF model are validated using existing expe

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17

Achour, Bachir. "Computation of Normal Depth in Trapezoidal Open Channel Using the Rough Model Method." Advanced Materials Research 955-959 (June 2014): 3231–37. http://dx.doi.org/10.4028/www.scientific.net/amr.955-959.3231.

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The recurring problem of calculating the normal depth in a trapezoidal open channel is easily solved by the rough model method. The Darcy-Weisbach relationship is applied to a referential rough model whose friction factor is arbitrarily chosen. This leads to establish the non-dimensional normal depth relationship in the rough model. Through a non-dimensional correction factor of linear dimension, the aspect ratio and therefore normal depth in the studied channel is deduced. Keywords: Rough model method, Trapezoidal channel, Normal depth, Turbulent flow, Discharge, Energy slope.

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18

Shiono, Koji. "Pollutant and Sediment Transport Caused by Turbulent Diffusion in Rivers and Estuaries." Advanced Materials Research 374-377 (October 2011): 1750–57. http://dx.doi.org/10.4028/www.scientific.net/amr.374-377.1750.

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Solute (pollutant) and sediment transports directly relate to controlling water quality in water environment (e.g. river, estuary and reservoir). An understanding of turbulent diffusion is the key for improving water quality in rivers and estuaries. Many studies on turbulent diffusion have been carried out in open channels, compound channels and estuaries for different flow conditions in the past. This paper reviews the past research mainly carried out by the author and includes flow structures, solute concentration distributions, mixing parameters in simple open channel, compound channel, riv

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19

Camporeale, Carlo, and Peter J. Schmid. "Parametric resonance in unsteady watertable flow." Journal of Fluid Mechanics 768 (March 12, 2015): 524–48. http://dx.doi.org/10.1017/jfm.2015.105.

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The stability of unsteady open-channel flow down an inclined plane is studied using an iterative approach based on the direct and adjoint stability equations combined with a physically justified energy measure. An efficient parametric resonance mechanism has been identified between the exogenous base-flow oscillations and the intrinsic frequencies of streamwise disturbance vortices. This resonance results in strong amplification over a substantial range of the governing parameters, favouring streamwise elongated structures. The optimal frequency for a maximal disturbance response can be effici

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20

Maxwell, Chikwue, Njoku Chumaraoke, Nwakuba Nnaemeka, Ezedozie Patrick, and Okorafor Okay. "Global mapper 15.0: A comparative software tool in the design of open channel drainage systems." Poljoprivredna tehnika 46, no. 3 (2021): 61–73. http://dx.doi.org/10.5937/poljteh2103061c.

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This research aimed at computing peak flow discharge using state-of-theart technology for watershed analysis to design a suitable open channel to minimize the effects of flood hazard during and after rainfall in an environment. A comprehensive topographical survey data obtained by Shuttle Radar Topographic Mission was employed in this study. The result of the survey shows that both the maximum and minimum elevation at 61.9 m and 51.1 m, respectively, and the mean slope of the area was 0.012. Watershed analysis of the study area was carried out using the Global Mapper15.0. The result shows that

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21

Prakoso, Aji Putro, Agneta Grace Pessireron, Damawidjaya Biksono, et al. "Open Channel Banki Cross-flow Turbine Slope CFD Analysis with Two Different Constant Approaches." Journal of Advanced Research in Applied Mechanics 135, no. 1 (2025): 106–16. https://doi.org/10.37934/aram.135.1.106116.

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Electrical energy has become an inescapable need for people worldwide, including Indonesia. Currently, fossil fuels are still the primary basis for producing electrical energy. Apart from the high emissions produced, fossil fuels are also non-renewable. Renewable energy, such as pico hydropower, is necessary to secure the electricity supply. Pico hydropower is the smallest scale of hydropower that generates electricity smaller than 5kW and usually works in low head conditions. Open channel cross-flow turbines are the right choice for pico hydroelectric power plants because they are suitable fo

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22

Azamathulla, H. Md, and Z. Ahmad. "GP approach for critical submergence of intakes in open channel flows." Journal of Hydroinformatics 14, no. 4 (2012): 937–43. http://dx.doi.org/10.2166/hydro.2012.089.

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This technical paper presents the genetic programming (GP) approach to predict the critical submergence for horizontal intakes in open channel flow for different bottom clearances. Laboratory data from the literature for the critical submergence for a wide range of flow conditions were used for the development and testing of the proposed method. Froude number, Reynolds number, Weber number and ratio of intake velocity and channel velocity were considered dominant parameters affecting the critical submergence. The proposed GP approach produced satisfactory results compared to the existing predi

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23

Jing, Siyu, Wenjun Yang, and Yue Chen. "Smooth Open Channel with Increasing Aspect Ratio: Influence on Secondary Flow." Water 11, no. 9 (2019): 1872. http://dx.doi.org/10.3390/w11091872.

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A high-resolution particle image velocitmetry system is used to investigate the relationship between secondary flow and aspect ratio in a straight channel. Considering the symmetry of open channel flow, the flow parameters in half of the flume are measured. Since the variation of the aspect ratio has a direct impact on the intensity and structure of secondary flows, this study was conducted in a smooth open channel to study the influence of aspect ratio on the structure and strength of secondary flows with aspect ratio change from 3 to 7.5 under supercritical flow condition. Profiles and conto

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24

Vatankhah, Ali R. "Open-channel sections with constant kinematic wave parameters." ISH Journal of Hydraulic Engineering 26, no. 3 (2018): 319–24. http://dx.doi.org/10.1080/09715010.2018.1491332.

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Qu, J., A. S. Ramamurthy, R. Tadayon, and Z. Chen. "Numerical simulation of sharp-crested weir flows." Canadian Journal of Civil Engineering 36, no. 9 (2009): 1530–34. http://dx.doi.org/10.1139/l09-067.

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The sharp-crested weir in a rectangular open channel can be used as a simple and accurate device for flow measurement and control in open channels. However, in the past, the solution to this problem was found mainly on the basis of experimental data or through the development of simplified theoretical expressions. In the present study, k-ε turbulence model is applied to obtain the flow parameters such as pressure head distributions, velocity distributions, and water surface profiles. The predictions of the proposed numerical model are validated using existing experimental data. The k-ε turbule

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Thappeta, Suresh Kumar, S. Murty Bhallamudi, Venu Chandra, Peter Fiener, and Abul Basar M. Baki. "Energy Loss in Steep Open Channels with Step-Pools." Water 13, no. 1 (2020): 72. http://dx.doi.org/10.3390/w13010072.

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Three-dimensional numerical simulations were performed for different flow rates and various geometrical parameters of step-pools in steep open channels to gain insight into the occurrence of energy loss and its dependence on the flow structure. For a given channel with step-pools, energy loss varied only marginally with increasing flow rate in the nappe and transition flow regimes, while it increased in the skimming regime. Energy loss is positively correlated with the size of the recirculation zone, velocity in the recirculation zone and the vorticity. For the same flow rate, energy loss incr

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NG, CHIU-ON, and T. L. YIP. "Effects of kinetic sorptive exchange on solute transport in open-channel flow." Journal of Fluid Mechanics 446 (October 23, 2001): 321–45. http://dx.doi.org/10.1017/s0022112001005791.

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A theory is presented for the transport in open-channel flow of a chemical species under the influence of kinetic sorptive exchange between phases that are dissolved in water and sorbed onto suspended sediments. The asymptotic method of homogenization is followed to deduce effective transport equations for both phases. The transport coefficients for the solute are shown to be functions of the local sediment concentration and therefore vary with space and time. The three important controlling parameters are the suspension number, the bulk solid–water distribution ratio and the sorption kinetics

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Qiu, Chunlin, Jiesheng Huang, Shihe Liu, and Wenhao Pan. "Double Parameters Generalization of Water-Blocking Effect of Submerged Vegetation." Water 15, no. 4 (2023): 764. http://dx.doi.org/10.3390/w15040764.

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Submerged vegetation has strong vitality, and the root system is highly developed. Because this vegetation has a good bank-solidifying-and-beautifying effect, it is widely used in ecological river construction. However, the open channel flow field and water-blocking mechanism of submerged vegetation are complicated. It is not convenient to use this kind of original model directly in engineering calculation, but it can be much more convenient if the original model is generalized into a simple model. However, there are not many generalization models, so it is necessary to propose a simple genera

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29

Bachrun, Ratna, Santi -, and Surya Baskara. "IDENTIFICATION OF GREYWATER FLOW CHARACTERISTICS IN OPEN CHANNELS." Water Conservation & Management 8, no. 2 (2023): 190–95. https://doi.org/10.26480/wcm.02.2024.190.195.

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The aim of this research is to determine the nature and behavior (characteristics) of greywater flow in open channels. The source of greywater comes from tofu making, households, laundry, and workshops. The parameters used in identifying the flow are velocity, discharge, Reynold’s number, specific energy, and Froude number. The research method used is experimental research, by simulating an open channel model. Simulations were run on each greywater sample and four discharge variations. Velocity measurements were done vertically at the flow depth and at four horizontal measurement distances. Th

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Hwang, Jenn-Jiang, and Tong-Miin Liou. "Heat Transfer and Friction in a Low-Aspect-Ratio Rectangular Channel with Staggered Slit-Ribbed Walls." International Journal of Rotating Machinery 4, no. 4 (1998): 283–91. http://dx.doi.org/10.1155/s1023621x98000244.

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Fully developed heat transfer and friction in a rectangular channel with slit-ribbed walls are examined experimentally. The slit ribs are transversely arranged on the bottom and top channel walls in a staggered manner. Effects of rib open-area ratio (β= 24%, 37%, and 46%), rib pitch-to-height ratio(Pi/H=10,15and20), and Reynolds number(10,000≤Re≤50,000)are examined. The rib height-to-channel hydraulic diameter ratio is fixed atH/De=0.081. It is disclosed that the heat transfer coefficient for the slit-ribbed channel is higher than that for the solid-ribbed channel, and increases with rib open-

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31

Kamboh, S. A., Izzatul Nabila Sarbini, Jane Labadin, and Monday O. Eze. "Simulation of 2D Saint-Venant equations in open channel by using MATLAB." Journal of IT in Asia 5, no. 1 (2016): 15–22. http://dx.doi.org/10.33736/jita.47.2015.

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2D surface flow models are useful to understand and predict the flow through breach, over a dyke or over the floodplains. This paper is aimed at the surface flows to study the behavior of flood waves. The open channel water flow in drains and rivers is considered in view of the fact that such flows are the source of flash flood. In order to predict and simulate the flood behavior, a mathematical model with the initial and boundary conditions is established using 2D Saint-Venant partial differential equations. Next, the corresponding model is discretized by using the explicit finite difference

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Andreasson, P., and A. Sellgren. "River Flow with Excessive Suspended Sediment Load." Hydrology Research 17, no. 4-5 (1986): 383–90. http://dx.doi.org/10.2166/nh.1986.0029.

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River flows with high volume concentrations (20-50%) of silty sediments generally imply that the mixture has non-Newtonian properties. In this study, the rheological behaviour of mixtures with solids particles smaller than 0.1 mm was identified experimentally with viscosimeters. Characteristic flow parameters, such as energy losses and depths, were then determined in several examples for turbulent open channel flows.

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Chakradhar, K., P. Ashok, M. Saraswathi, B. Anitha, and B. Sushmasri. "Impact of Permeable Lining of the Wall on the Peristaltic Flow of Rabinowitsch Fluid in a Vertical Channel." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, no. 12 (2024): 1–7. https://doi.org/10.55041/ijsrem39544.

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Rabinowitsch fluid model is a well-established model for studying the non-Newtonian nature of the fluid This study is carried out to analyze the Rabinowitsch fluid through flexible and symmetric vertical channel with suction and injection under peristaltic motion. Considering long wavelength and low Reynolds number assumptions,. The present work is the mathematical investigation of permeable lining of the wall on the peristaltic flow of Rabinowitsch fluid in vertical channel with suction and injection . Pressure rise and the variation of various influencing parameters of the flow are studied g

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Nedelcu, Dragoş Iulian, Iulian Florescu, and Petru Gabriel Puiu. "The Simulative Analysis of the Fluid Parameters in Zone of Apparition of the Hydraulic Jump in the Penstock Placed on the Open Channels." Applied Mechanics and Materials 809-810 (November 2015): 968–73. http://dx.doi.org/10.4028/www.scientific.net/amm.809-810.968.

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The paper proposes to realize a simulative analysis following the theoretical notions regarding the hydraulic jump, at flow of fluids through open channels, when open a plane penstock, which is located in a trapezoidal channel. A penstock is formed from a plan panel with upright movement in supports, with the possibility of adjustment a fluid flow by means of a handling device.

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Blanckaert, K. "Flow separation at convex banks in open channels." Journal of Fluid Mechanics 779 (August 17, 2015): 432–67. http://dx.doi.org/10.1017/jfm.2015.397.

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Laboratory experiments in an open channel bend provide insight into the physics of convex bank flow separation occurring in a variety of channel configurations, including confluences and bifurcations. The edge of the zone of flow separation is characterized by a shear layer, enhanced velocity gradients, tke, turbulent shear stresses and reversal of the streamwise vorticity and vertical velocity. The latter result from turbulence-induced secondary flow near the convex bank. When bankline curvature abruptly increases, flow tends to move away from the convex bank along a straight path, as represe

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Janapati, Siva Shankara Rao. "SLIP EFFECTS ON MHD FREE CONVECTIVE FLOW OF A FLUID IN AN INCLINED CHANNEL." YMER Digital 21, no. 06 (2022): 684–91. http://dx.doi.org/10.37896/ymer21.06/69.

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In this research paper, analysis the flow and heat transfer aspects of conducting fluid in an inclined channel with constant a pressure gradient. The governing equations are solved analytically valid for small Prandtl number(Pr) and Eckert number (Ec). The expressions for the velocity and temperature are obtained analytically. The effects of various physical parameters on the velocity and the temperature are discussed in detail. Keywords : Magnetohydrodynamics, Heat transfer, Inclined Channel, Pressure gradient

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Pan, Li, Lianjun Zhao, Mingwu Zhang, and Zhiqiang Lai. "Experimental Study of the Hydrodynamics of an Open Channel with Algae Attached to the Side Wall." Water 15, no. 16 (2023): 2921. http://dx.doi.org/10.3390/w15162921.

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The construction of large-scale water diversion projects has effectively alleviated the current situation of the uneven distribution of water resources in China. However, due to the siltation of very fine sediment and organic matter on the side wall of an open channel, and the slow velocity of the side wall flow field, it is easy for epipelic algae to be produced, which affects water quality. Because prototype observation cannot be used to predict the series of flow in real time, and the calculation of the mathematical model is affected by parameter limitations, these two methods often cannot

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Kori, S. M., A. A. Mahessar, M. Channa, A. A. Memon, and A. R. Kori. "Study of Flow Characteristics Over a Rounded Edge Drop Structure in Open Channel." Engineering, Technology & Applied Science Research 9, no. 3 (2019): 4136–39. http://dx.doi.org/10.48084/etasr.2584.

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Flow over a drop structure is a form of free overfall called hydraulic drop. Hydraulic drop changes the nature of flow abruptly from sub-critical to super-critical condition. Rapidly varied flow analysis is a complex phenomenon and involves remarkable characteristics. Some of the drop structures constructed in Sindh and Punjab provinces of Pakistan had gone through diverse failures, consequential in interruption of water supply to irrigation fields encountering substantial economic loss. In the present study experiments were carried out in the hydraulic laboratory of Mehran University of Engin

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Badduri, Srinivasa Reddy, G. Naga Srinivasulu, and S. Srinivasa Rao. "Influence of Lung Channel Design Bipolar Plate on Performance of PEMFC Using Computational Fluid Dynamic Analysis." Materials Science Forum 969 (August 2019): 530–35. http://dx.doi.org/10.4028/www.scientific.net/msf.969.530.

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A 3-D computational model was developed to examine the proton exchange membrane fuel cell (PEMFC) performance using Lung channel design bipolar plate. The model was developed using ANSYS FLUENT-15.0 software and simulations were carried out at 100 % humidity conditions. The parameters such as pressure distribution, hydrogen and oxygen concentrations and proton conductivity were briefly presented. The simulation results of Lung channel are presented in the form of polarization curves. The results of a Lung channel compare with the conventional flow channel and observed that the Lung channel giv

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Kori, Shafi Muhammad, Ali Asghar Mahessar, Madeeha Channa, Ashfaque Ahmed Memon, and Abdul Rehman Kori. "Study of Flow Characteristics Over a Rounded Edge Drop Structure in Open Channel." Engineering, Technology & Applied Science Research 9, no. 3 (2019): 4136–39. https://doi.org/10.5281/zenodo.3249066.

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Flow over a drop structure is a form of free overfall called hydraulic drop. Hydraulic drop changes the nature of flow abruptly from sub-critical to super-critical condition. Rapidly varied flow analysis is a complex phenomenon and involves remarkable characteristics. Some of the drop structures constructed in Sindh and Punjab provinces of Pakistan had gone through diverse failures, consequential in interruption of water supply to irrigation fields encountering substantial economic loss. In the present study experiments were carried out in the hydraulic laboratory of Mehran University of Engin

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Zuikov, Andrey, and Tatiana Suehtina. "Hydraulics of smoothly streamlined Venturi channels of critical depth." E3S Web of Conferences 91 (2019): 07021. http://dx.doi.org/10.1051/e3sconf/20199107021.

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The article relates to the field of hydraulics and engineering hydrology and is devoted to a study of fluid flow in a non-flooded Venturi channel. The purpose of the work is improvement of methods for calculating profiles and hydraulic characteristics of a Venturi flumes used for measurement of water flow rates in open channels and rivers. Research methods are analytical with experimental verification. A functional relationship is obtained between the Froude number in an arbitrary section of the Venturi channel and its width normalized by the width of the critical section. It is established th

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Nasibullayev, I. Sh, E. Sh Nasibullaeva, and O. V. Darintsev. "Study of fluid flow through a channel deformed by piezoelement." Multiphase Systems 13, no. 3 (2018): 1–10. http://dx.doi.org/10.21662/mfs2018.3.001.

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The flow of a liquid through a tube deformed by a piezoelectric cell under a harmonic law is studied in this paper. Linear deformations are compared for the Dirichlet and Neumann boundary conditions on the contact surface of the tube and piezoelectric element. The flow of fluid through a deformed channel for two flow regimes is investigated: in a tube with one closed end due to deformation of the tube; for a tube with two open ends due to deformation of the tube and the differential pressure applied to the channel. The flow rate of the liquid is calculated as a function of the frequency of the

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Uppuluri, V. Manoj Kumar, S. Sreenadh, G. Gopi Krishna, and A. N. S. Srinivas. "Couette Flow of a Casson Fluid in an Inclined Composite Duct." International Journal of Engineering and Advanced Technology 9, no. 1s5 (2019): 288–92. http://dx.doi.org/10.35940/ijeat.a1064.1291s519.

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Couette flow of a Casson fluid in an inclined composite duct comprising of porous and fluid layers of different thickness is investigated. A fully developed steady flow is assumed to be produced by applying a constant pressure gradient. The flow governing equations are described as per the standard literature. The boundary conditions at the porous and free fluid interface are formulated and the equations for fluid velocity within the porous layer and in the open channel are solved analytically. These flow quantities are studied for the effect of parameters such as porous layer thickness, volum

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Evangelia, D. Farsirotou, and V. Soulis Johannes. "A multi-grid finite-volume method for free-surface flows." International Journal of Engineering Research & Science 4, no. 8 (2018): 01–13. https://doi.org/10.5281/zenodo.1407395.

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<strong><em>Abstract</em></strong><strong>—</strong><em>A depth-averaged subcritical and/or supercritical, steady, free-surface flow numerical model is developed to calculate physical hydraulic flow parameters in open channels. The vertically averaged free-surface flow equations are numerically solved using an explicit finite-volume numerical scheme in integral form. The grid used may be irregular and conforms to the physical boundaries of any problem. A multi-grid algorithm has been developed and has subsequently been applied to accelerate the convergence solution. A grid clustering tec

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Ahmad, Z., H. Md Azamathulla, and N. A. Zakaria. "ANFIS-based approach for the estimation of transverse mixing coefficient." Water Science and Technology 63, no. 5 (2011): 1004–9. http://dx.doi.org/10.2166/wst.2011.282.

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Understanding of the fate of pollutants, disposed of in streams, is a matter of concern in recent years for the effective control of pollution. Transverse mixing of the pollutants in open channels is arguably more important than the longitudinal mixing and near-field mixing. Several attempts have been made to establish the relationship between the transverse mixing coefficient and bulk channel and flow parameters such as width, depth, shear velocity, friction factor, curvature and sinuosity. This paper presents adaptive neuro fuzzy inference system (ANFIS) approach to predict the transverse mi

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KURBANGALEEV, A. A., F. KH TAZYUKOV, and A. V. GERASIMOV. "MODELING OF FLOW IN A HERRINGBONE-TYPE MICROFLUIDIC CHANNEL." Herald of Technological University 27, no. 11 (2024): 147–50. https://doi.org/10.55421/1998-7072_2024_27_11_147.

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The article contains the results of mathematical modeling in a two-dimensional formulation of fluid flow through a channel. The flow regime is laminar. The model was tested under different regimes. Some regimes considered the flow that passes through a microfluidic device in a channel with herringbone geometry in the forward direction, other regimes with the reverse flow direction. A microfluidic device with herringbone geometry in a channel is a microfluidic channel 0.2 mm wide and 13 mm long in which a device with herringbone geometry is located 5 mm from the beginning of the channel length.

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Sharifi, S., M. Sterling, and D. W. Knight. "A novel application of a multi-objective evolutionary algorithm in open channel flow modelling." Journal of Hydroinformatics 11, no. 1 (2009): 31–50. http://dx.doi.org/10.2166/hydro.2009.033.

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The Shiono and Knight method (SKM) is a simple depth-averaged flow model, based on the RANS equations which can be used to estimate the lateral distributions of depth-averaged velocity and boundary shear stress for flows in straight prismatic channels with the minimum of computational effort. However, in order to apply the SKM, detailed knowledge relating to the lateral variation of the friction factor (f), dimensionless eddy viscosity (λ) and a sink term representing the effects of secondary flow (Γ) are required. In this paper a multi-objective evolutionary algorithm is used to study the lat

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Benabid, Abderrahmane, Mazouz Badis, Fourar Ali, Mansouri Tarek, and Mohammed Saadi. "Numerical Simulation of Gradually Varying Permanent Flows in a Prismatic Open Channel for Four Geometric Shapes." Engineering, Technology & Applied Science Research 14, no. 4 (2024): 15274–82. http://dx.doi.org/10.48084/etasr.7715.

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Standing flows in natural channels often cause phenomena that can be very serious, such as flooding, deformation of channel geometry, and destruction of infrastructure (dams, bridges, and culverts). This study focuses on the computation of gradually varying permanent flows (backwater curves) by two methods: direct integration (Chow) and successive approximation (depth variation). To solve the system of equations governing the problem of gradually varying one-dimensional stationary flows at a free surface, a large amount of data should be taken into account, namely, the flow rate, the water hea

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Marsalek, J., and B. J. Greck. "Head losses at manholes with a 90° bend." Canadian Journal of Civil Engineering 15, no. 5 (1988): 851–58. http://dx.doi.org/10.1139/l88-110.

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Head and pressure changes were studied at manholes with a 90° bend. For pressurized flow, such changes depend only on junction geometry. Among junction parameters, the benching was found particularly important. Full benchings reaching to the pipe crown produced the lowest head losses, particularly when combined with an enlarged pipe diameter at the junction. Head changes in open-channel flow were significantly smaller than those in pressurized flow. Key words: head loss, manholes, sewer junctions, sewer design, sewer hydraulics.

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Sumiadi, Sumiadi, Bambang Kironoto, Djoko Legono, and Istiarto Istiarto. "Bed-Shear Velocity Measurement in Curved Open Channel." Civil and Environmental Science 004, no. 01 (2021): 093–105. http://dx.doi.org/10.21776/ub.civense.2021.00401.9.

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Generally, the condition of the rivers in Indonesia are alluvial rivers which had meanders, where the change in the river bed topography often occur. One of the parameters associated with changes in the river bed topography is bed-shear velocity, or Reynolds stress. The bed-shear velocity can be calculated by the Reynolds stress distribution method and the Clauser method which commonly used in straight channels. In fact, on natural channel there is a curve and even a meandering channel. With more complex flow conditions, the use of the Clauser method in curved channels can be questioned, is it

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