Relevant bibliographies by topics / Hydraulisk modell

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Hydraulisk modell'

Author: Grafiati
Published: 30 June 2021
Last updated: 29 July 2025

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Journal articles on the topic "Hydraulisk modell"

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Christoffersen, Bradley O., Manuel Gloor, Sophie Fauset, et al. "Linking hydraulic traits to tropical forest function in a size-structured and trait-driven model (TFS v.1-Hydro)." Geoscientific Model Development 9, no. 11 (2016): 4227–55. http://dx.doi.org/10.5194/gmd-9-4227-2016.

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Abstract. Forest ecosystem models based on heuristic water stress functions poorly predict tropical forest response to drought partly because they do not capture the diversity of hydraulic traits (including variation in tree size) observed in tropical forests. We developed a continuous porous media approach to modeling plant hydraulics in which all parameters of the constitutive equations are biologically interpretable and measurable plant hydraulic traits (e.g., turgor loss point πtlp, bulk elastic modulus ε, hydraulic capacitance Cft, xylem hydraulic conductivity ks,max, water potential at 5
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Belenkov, Yu A., A. V. Lepeshkin, V. E. Suzdaltsev, and I. V. Fateev. "Computer models of laboratory works for Hydraulics, hydromachines and hydraulic transmissions for distance learning system." Izvestiya MGTU MAMI 4, no. 2 (2010): 252–58. http://dx.doi.org/10.17816/2074-0530-69807.

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The paper suggest the methodology of virtual laboratory works for Hydraulics, hydromachines and hydraulic transmissions. Similar laboratory systems are needed for further progress of distance learning system in Russian Federation.
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Guo, Xiao Le, Zhi Ming Wang, and Zhi Hui Long. "Hydraulics Analysis System for Extended Reach Drilling in China and its Application." Applied Mechanics and Materials 241-244 (December 2012): 1349–53. http://dx.doi.org/10.4028/www.scientific.net/amm.241-244.1349.

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The extended reach drilling (ERD) is being adopted widely as an effective and economical way of developing oilfields in China. But it also brought a series of technical difficulties because of its own characteristics. Some progresses were made after several years of hard work in China about Hydraulics for extended reach drilling, which included cuttings transport models and rules, precise model of circulating system pressure loss calculation, hole cleaning calculating models and monitoring method, hydraulic extended limit calculation model and analysis, hydraulics design and optimization metho
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Vanderborght, Jan, Valentin Couvreur, Felicien Meunier, et al. "From hydraulic root architecture models to macroscopic representations of root hydraulics in soil water flow and land surface models." Hydrology and Earth System Sciences 25, no. 9 (2021): 4835–60. http://dx.doi.org/10.5194/hess-25-4835-2021.

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Abstract. Root water uptake is an important process in the terrestrial water cycle. How this process depends on soil water content, root distributions, and root properties is a soil–root hydraulic problem. We compare different approaches to implement root hydraulics in macroscopic soil water flow and land surface models. By upscaling a three-dimensional hydraulic root architecture model, we derived an exact macroscopic root hydraulic model. The macroscopic model uses the following three characteristics: the root system conductance, Krs, the standard uptake fraction, SUF, which represents the u
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Guo, Xiao Le, Zhi Ming Wang, and Zhi Hui Long. "Research Progresses of Hydraulics for Extended Reach Drilling in China, Part I: Cuttings Transport and Precise Calculation of Pressure Loss." Advanced Materials Research 524-527 (May 2012): 1557–60. http://dx.doi.org/10.4028/www.scientific.net/amr.524-527.1557.

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The extended reach drilling (ERD) is being adopted widely as an effective and economical way of developing oilfields in China. But it also brought a series of technical difficulties because of its own characteristics. Some progresses were made after several years of hard work in China about Hydraulics for extended reach drilling, which included cuttings transport models and rules, precise model of circulating system pressure loss calculation, hole cleaning calculating models and monitoring method, hydraulic extended limit calculation model and analysis, hydraulics design and optimization metho
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Wang, Yujie, and Christian Frankenberg. "Technical note: Common ambiguities in plant hydraulics." Biogeosciences 19, no. 19 (2022): 4705–14. http://dx.doi.org/10.5194/bg-19-4705-2022.

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Abstract. Plant hydraulics gains increasing interest in plant ecophysiology and vegetation modeling. However, the hydraulic properties and profiles are often improperly represented, thus leading to biased results and simulations, e.g., the neglection of gravitational pressure drop results in overestimated water flux. We highlight the commonly seen ambiguities and/or misunderstandings in plant hydraulics, including (1) the distinction between water potential and pressure, (2) differences among hydraulic conductance and conductivity, (3) xylem vulnerability curve formulations, (4) model complexi
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Ostendorf, David W., Don J. DeGroot, Wayne M. Shelburne, and Travis J. Mitchell. "Hydraulic head in a clayey sand till over multiple timescales." Canadian Geotechnical Journal 41, no. 1 (2004): 89–105. http://dx.doi.org/10.1139/t03-074.

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This paper presents an analysis of hydraulic head data measured every 2 h for 2 years in the leading edge of a drumlin that consists of weathered, brown clayey sand till and underlying unweathered gray clayey sand till. The brown till responds as an unconfined aquifer and acts as a boundary condition for the confined gray till aquifer. Analytical models are presented for interpretation of the hydraulic head data using annual, monthly, and daily timescales, for estimation of drumlin (landform) hydraulics and till (formation) properties. The annual average head data from open-standpipe piezomete
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Ndomba, Preksedis M., and Joel Nobert. "Problems and Prospects of Hydraulic Modelling For Environmental Flows Assessment Studies in East Africa." Tanzania Journal of Engineering and Technology 34, no. 2 (2013): 67–83. http://dx.doi.org/10.52339/tjet.v34i2.460.

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The objective of this paper is to document the problems and prospects of hydraulic modelling for Environmental Flows Assessment (EFA) studies based on selected case studies. Most of studies in East Africa use Holistic methodologies. An ideal data set for defining river hydraulics for most of these methods would be six data points of stage measurements over a good distribution of discharges, the stage of zero discharge and some flood-related data. Besides, in East African region EFA studies suffer from data scarcity (i.e., poorly gauged sites) and limited expertise and funding. The hydraulics s
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Berardi, L., and O. Giustolisi. "Calibration of Design Models for Leakage Management of Water Distribution Networks." Water Resources Management 35, no. 8 (2021): 2537–51. http://dx.doi.org/10.1007/s11269-021-02847-x.

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AbstractWater losses in urban water distribution networks (WDN) accelerate the deterioration of such infrastructures. The enhanced hydraulic modelling provides a phenomenological representation of WDN hydraulics, including the modelling of leakages as function of pipe average pressure and deterioration. The methodological use of such models on real WDN was demonstrated to support the planning of leakage management actions. Nonetheless, many water utilities are still in the process of designing flow/pressure monitoring, thus data available are not enough to perform detailed calibration of such
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Sweeney, D. G., N. J. Cromar, J. B. Nixon, C. T. Ta, and H. J. Fallowfield. "The spatial significance of water quality indicators in waste stabilization ponds - limitations of residence time distribution analysis in predicting treatment efficiency." Water Science and Technology 48, no. 2 (2003): 211–18. http://dx.doi.org/10.2166/wst.2003.0123.

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Over the past fifty years, considerable research in waste stabilization pond operation has led to the development of a number of models used to describe the hydraulic regime and predict treatment efficiency. Models range in complexity from plug or completely mixed simplifications to computational fluid dynamics (CFD) models which are able to predict flow hydraulics at a local level. Information about the exit age of pond effluent can be used to estimate pollutant decay. However, a mechanistic approach to understanding pond operation highlights the importance of knowing both the time and spatia
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Dissertations / Theses on the topic "Hydraulisk modell"

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Erlandsson, Marie. "Överbelastningsproblem för avloppsledningsnät och kostnadseffektiva åtgärder : En fallstudie med förenklad hydraulisk modell." Thesis, Uppsala University, LUVAL, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-128865.

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<p>Många svenska kommuner har idag problem med överbelastade avloppsledningssystem. Det kan bland annat resultera i källaröversvämningar i närbelägna fastigheter, överbelastade reningsverk eller bräddningar till recipienten. För att motverka dessa effekter kan olika åtgärder vidtas. Åtgärderna kan vara olika lämpliga beroende på typ av område och kostnaderna för genomförandet kan variera kraftigt och ha olika miljöpåverkan. Detta innebär att det är viktigt att väga samman effektiviteten av olika åtgärder, deras miljöpåverkan, kundnytta och kostnad.</p><p>Syftet med examensarbetet var att med h
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Kjellander, Kalle. "River-Aquifer Interaction in the Uppsala Esker - a Modelling Study of a Proposed Drinking Water Production site." Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-355671.

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The Swedish municipalities of Gävle and Älvkarleby need new sources of drinking water as the population grows. Gästrike vatten AB has employed the consultant firm Midvatten AB to assess the possibility of a new groundwater extraction site on the Uppsala esker between Älvkarleby and Skutskär in northern Uppland county. It has been observed that the natural recharge to the aquifer in the Uppsala esker might be too low to compensate for a future groundwater extraction and that there is a risk of induced infiltration from the river Dalälven if the water table is lowered. River water might bring or
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Kuoljok, Simon Pirak. "Konnektivitetsåtgärder i Emån : En fallstudie vid Högsby vattenkraftverk." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298253.

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Den nationella planen för vattenverksamheter antogs år 2020 och innebär att vattenverksamheter ska förses med moderna miljövillkor för att öka vattenmiljönytta och att bibehålla den effektiva tillgången till vattenkraftsel. Emån som är ett Natura 2000-område är det största vattendraget i sydöstra Sverige och vattendraget är utifrån konnektiviteten klassificerat som måttlig. Högsby vattenkraftverk, som ligger i Emån och ägs av Uniper, ska omprövas utifrån miljövillkor enligt den nationella planen och idag har Högsby vattenkraftverk ingen fastställd minimitappning för
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Wallin, Tony. "Metoder för identifiering och kvalitetsbestämning av lax- och öringhabitat." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298186.

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Vattenkraftens ska förses med moderna miljövillkor i linje med miljöbalken. Ett av underlagen som föreslås vara nödvändigt inför prövningen är kännedom var det finns strömmande vatten och olika typer av habitat, något som inte finns i alla avrinningsområden. Arbetets syfte var därför att testa och utvärdera metoder som med begränsat underlag kan användas för att identifiera lax- och öringshabitat samt utreda sträckornas habitatskvaliteten.  För att genomföra detta genomfördes först en lutningsanalys där vattendragets strömsträckor identifierades genom att utifrån
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Tranová, Kateřina. "Hydraulická analýza vodovodní sítě městské části Brno - Ivanovice." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265396.

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This diploma´s thesis aims to model the hydraulic model of the Brno – Ivanovice water supply system. The software MIKE URBAN for model hydraulic model of water supply system was used. It was performed a simulation of the various states of loading. The water supply system was assessment of pressure ratios. The outcome of this work is calibrated hydraulic model of water supply system. The appendix consists also of drawings, which represented pressure ratios, which are situated on water supply system. On the fourth drawing is described transparent situation of Brno-Ivanovice water supply system.
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Thiele, Elizabeth Anne. "Culvert Hydraulics: Comparison of Current Computer Models." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd1727.pdf.

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Forsberg, Johan. "Model-based study of the energy efficiency of two different types of harvester cranes." Thesis, KTH, Maskinkonstruktion (Inst.), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-156712.

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In today’s forest industry two mechanized methods are used, the Tree Length (TL) method and the Cut To Length (CTL) method. With the Tree Length method, trees are harvested and extracted from the forest as a whole tree to be further processed whereas with the Cut To Length method trees are harvested, branches are removed and the tree is cut to desired length to be extracted by a forwarder. The Cut To Length method is now a day 100 percent mechanized and more and more emphasis is put on efficiency in both harvesting and forwarding the trees. Efficiency can be measured in trees harvested per hou
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Cieslar, Filip. "Modely a simulace pochodů bezemisního kolového nakladače s elektrickým pohonem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-442865.

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This diploma thesis deals with the creation of models simulating the processes of an emission-free wheel loader, which was created by rebuilding the original version with a combustion engine. Part of the work is the methodical creation of models from the basic part of the machine to a simplified model of the overall machine, its functional verification and calibration based on available information’s and measurements. In this paper, selected parameters of the overall machine model are verified based on performed measurements, the suitability of selected components is verified, and the optimiza
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Náplavová, Eva. "Kalibrace hydraulického modelu vodovodní sítě." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409704.

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This diploma thesis deals with calibration of hydraulic simulation models, especially with methods used for calibration and parameters that are modified during calibration. The literature review in the field of mathematical modeling, basic principles applied in hydraulic modeling and the current approach to calibration and data collection is done in theoretical part. In the practical part of the thesis, a hydraulic model of the group water supply system Horní Dunajovice is built and subsequently calibrated. The calibration is first performed manually for the normal operational status and then
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Howe, Edmund. "Hydraulic Assessment of Notched River Training Structures on a Portion of the Lower Mississippi River Using the Adaptive Hydraulics Model." Thesis, Mississippi State University, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10275634.

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<p> River training structures are widely used to create and maintain navigable waterways, to restore rivers and channels in a more stable condition, to promote environmental benefits, and to protect people and infrastructure from damages or floods. Few historical datasets on the changes and impacts in secondary waterbodies resulting from notched river training structures are available for the Lower Mississippi River. Access to the notched training structures on the Lower Mississippi River remains difficult and inhibits data collection for monitoring efforts. This increases the need for alterna
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Books on the topic "Hydraulisk modell"

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Maynord, Stephen T. Selective withdrawal riser for Cave Run Lake. Dept. of the Army, Waterways Experiment Station, Corps of Engineers, 1986.

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Congress, International Association for Hydraulic Research. HYDRA 2000. Telford, 1995.

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Benson, Howard A. Mississippi River passes physical model study.: Hydraulic model investigation. Dept. of the Army, Waterways Experiment Station, Corps of Engineers, 1986.

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Maynord, Stephen T. General spillway investigation: Hydraulic model investigation. Dept. of the Army, US Army Corps of Engineers, 1985.

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Maynord, Stephen T. General spillway investigation: Hydraulic model investigation. Dept. of the Army, US Army Corps of Engineers, 1985.

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Brahme, Shashikant B. Hydraulic model studies for suction cutterheads. Sea Grant College Program, Texas A & M University, 1987.

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Granat, Mitchell A. Reverification of the Chesapeake Bay model: Chesapeake Bay hydraulic model investigation. Dept. of the Army, Waterways Experiment Station, Corps of Engineers, 1985.

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Hydraulics Laboratory (U.S.), ed. Model study of Prado flood-control dam: Hydraulic model investigation. US Army Corps of Engineers, Hydraulics Laboratory, 1989.

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Franciss, F. O. Fractured rock hydraulics. CRC Press, 2010.

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Franciss, F. O. Fractured rock hydraulics. CRC Press, 2010.

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Book chapters on the topic "Hydraulisk modell"

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Munoz-Hernandez, German Ardul, Sa’ad Petrous Mansoor, and Dewi Ieuan Jones. "Hydraulic Models." In Advances in Industrial Control. Springer London, 2012. http://dx.doi.org/10.1007/978-1-4471-2291-3_4.

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Guitjens, J. C. "Hydraulic Models." In Agronomy Monographs. American Society of Agronomy, 2016. http://dx.doi.org/10.2134/agronmonogr17.c28.

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Hamill, Les. "Dimensional analysis and hydraulic models." In Understanding Hydraulics. Macmillan Education UK, 2011. http://dx.doi.org/10.1007/978-0-230-34586-7_10.

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Hamill, Les. "Dimensional Analysis and Hydraulic Models." In Understanding Hydraulics. Macmillan Education UK, 1995. http://dx.doi.org/10.1007/978-1-349-13296-6_9.

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Vreugdenhil, Cornelis B. "Numerical Solution for Box Model." In Computational Hydraulics. Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-95578-5_3.

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Vreugdenhil, Cornelis B. "Diffusion Model for Coastline Development." In Computational Hydraulics. Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-95578-5_9.

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Zhang, Yaoxiang, Xue Zhang, Hongxing Yu, and Sijia Du. "Research on Thermal-Hydraulic Model and Characteristics of Lead Cooled Traveling Wave Reactor." In Springer Proceedings in Physics. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1023-6_49.

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AbstractTraveling wave reactor (TWR) is an advanced nuclear power system, which can keep the total amount of fissionable nuclides constant during its lifetime through the transformation of fissionable nuclides in the reactor, so as to maintain the stability of the effective proliferation factor of the reactor core. As a coolant, lead has low neutron moderation ability and capture cross section. At the same time, it also has excellent thermal characteristics. Lead cooled traveling wave reactor is a reactor with high inherent safety and good application prospects. The research on reactor core ma
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Schulz, H. D., W. Dreybrodt, B. Merkel, et al. "Hydrogeochemical and Geochemical-Hydraulic Models and Model Concepts." In Progress in Hydrogeochemistry. Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-76629-9_6.

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Palai, Deepika P., and K. K. Khatua. "Flow Distribution in Diverging Compound Channel Using LES Models." In River Hydraulics. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-81768-8_37.

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Mantelli, Marcia Barbosa Henriques. "Thermal and Hydraulic Models." In Thermosyphons and Heat Pipes: Theory and Applications. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-62773-7_3.

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Conference papers on the topic "Hydraulisk modell"

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Fan, Honghai, Haobo Zhou, Guo Wang, Qi Peng, and Yiqing Wang. "Utility Hydraulic Calculation Model of Herschel-Bulkley Rheological Model for MPD Hydraulics." In SPE Asia Pacific Oil & Gas Conference and Exhibition. Society of Petroleum Engineers, 2014. http://dx.doi.org/10.2118/171443-ms.

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Gonzalez, M., A. Dahi Taleghani, and J. E. Olson. "A Cohesive Model for Modeling Hydraulic Fractures in Naturally Fractured Formations." In SPE Hydraulic Fracturing Technology Conference. SPE, 2015. http://dx.doi.org/10.2118/spe-173384-ms.

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Abstract A cohesive zone model (CZM) has been developed to couple fluid flow with elastic, plastic and damage behavior of rock during hydraulic fracturing in naturally fractured formations. In addition to inelastic deformations, this model incorporates rock anisotropies. Fracture mechanics of microcrack and micro-void nucleation and their coalescence are incorporated into the formulation of the CZM models to accurately capture different failure modes of rocks. The performance of the developed elastoplastic and CZM models are compared with the available data of a shale play, and then the models
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Varyu, D., B. Greimann, D. Bradley, and K. Russell. "Sand bar volume model: Improving modeled sand bar response in Marble Canyon." In The International Conference On Fluvial Hydraulics (River Flow 2016). CRC Press, 2016. http://dx.doi.org/10.1201/9781315644479-179.

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Abdul Azeez, Abid, Xu Han, Viacheslav Zakharov, and Tatiana Minav. "AI-Based Condition Monitoring of Hydraulic Valves in Zonal Hydraulics Using Simulated Electric Motor Signals." In ASME/BATH 2021 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/fpmc2021-68615.

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Abstract Zonal hydraulics, in particular Direct Driven Hydraulics (DDH), is an emerging transmission and actuation technique that is proposed to be used for electrification of heavy-duty mobile machinery. In addition to the already demonstrated advantages of DDH, which include high efficiency, compactness, and ease of maintenance, it is also capable of condition monitoring. The condition monitoring features can be obtained through indirect analysis of the existing electric motor signals (voltage and current) using artificial intelligence-based algorithms rather than by adding extra sensors, wh
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Goswami, Giota, Charles Nutakor, and Jussi Sopanen. "Modeling and Co-Simulation of Hybrid Off-Road Machinery." In ASME 2023 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/detc2023-116543.

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Abstract Co-simulation is a modeling approach that can be used to simulate systems that combine multiple physical domains in a computationally efficient manner. Hybrid off-road machinery can be modeled with required complexity by using multibody dynamics approach. The model of the machinery body can be combined with a hybrid electric powertrain which includes electrical and mechanical components in the powertrain through co-simulation. This paper describes a co-simulation platform that combines system-level hybrid electric powertrain models with detailed models of off-road machinery with hydra
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Liu, Songxia, and Peter P. Valkó. "An Improved Equilibrium-Height Model for Predicting Hydraulic Fracture Height Migration in Multi-Layer Formations." In SPE Hydraulic Fracturing Technology Conference. SPE, 2015. http://dx.doi.org/10.2118/spe-173335-ms.

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Abstract Fracture height is a critical input parameter for 2D hydraulic fracturing design models, and also an important output result of 3D models. While many factors may influence fracture height evolution in multi-layer formations, the consensus is that the so called “equilibrium height belonging to a certain treating pressure” provides an upper limit, at least for non-naturally fractured media. How to solve the “equilibrium height” problem has been known since the 1970s. However, because of the complexity of the algebra involved, published equations are overly simplified and do not provide
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Khan, Abdul Muqtadir, Abdullah BinZiad, Abdullah Al Subaii, Turki Alqarni, Mohamed Yassine Jelassi, and Asim Najmi. "Supervised Learning Predictive Models for Automated Fracturing Treatment Design: A Workflow Based on Algorithm Comparison and Multiphysics Model Validation." In SPE International Hydraulic Fracturing Technology Conference & Exhibition. SPE, 2022. http://dx.doi.org/10.2118/205310-ms.

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Abstract Diagnostic pumping techniques are used routinely in proppant fracturing design. The pumping process can be time consuming; however, it yields technical confidence in treatment and productivity optimization. Recent developments in data analytics and machine learning can aid in shortening operational workflows and enhance project economics. Supervised learning was applied to an existing database to streamline the process and affect the design framework. Five classification algorithms were used for this study. The database was constructed through heterogeneous reservoir plays from the in
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Zhang, Qi, Feng Wang, Bing Xu, and Kim A. Stelson. "Influence of Hydraulic Accumulator Performance on the Hydraulic Hybrid Powertrain." In ASME/BATH 2019 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/fpmc2019-1709.

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Abstract Owing to its high power density, hydraulic hybrid is considered as an effective approach to reducing the fuel consumption of heavy duty vehicles. A gas-charged hydraulic accumulator serves as the power buffer, storing and releasing hydraulic power through gas. An accurate hydraulic accumulator model is crucial to predict its actual performance. There are two widely used accumulator models: isothermal and adiabatic models. Neither of these models are practical to reflect its real performance in the hydraulic hybrid system. Therefore, the influence of an accumulator model considering th
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Ames, Brandon C., and Andrew P. Bunger. "Role of Turbulent Flow in Generating Short Hydraulic Fractures with High Net Pressure in Slickwater Treatments." In SPE Hydraulic Fracturing Technology Conference. SPE, 2015. http://dx.doi.org/10.2118/spe-173373-ms.

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Abstract This paper provides an argument for considering turbulent flow for hydraulic fracturing using slickwater in shale reservoirs. It shows that the tendency of models that assume laminar fluid flow to over-predict fracture length and under-predict net pressure can be corrected by instead recognizing that the flow regime is turbulent for high rate, water-driven hydraulic fractures. Firstly, we provide a rationale supporting the appropriateness of assuming turbulent flow. Then, using a Perkins-Kern-Nordgren (PKN) fracture model and parameters similar to slickwater treatments in shale reserv
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Bérard, T., J. Desroches, Y. Yang, X. Weng, and K. Olson. "High-Resolution 3D Structural Geomechanics Modeling for Hydraulic Fracturing." In SPE Hydraulic Fracturing Technology Conference. SPE, 2015. http://dx.doi.org/10.2118/spe-173362-ms.

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Abstract Three-dimensional (3D) geomechanical models built at reservoir scale lack resolution at the well sector scale (e.g., hydraulic fracture scale), at least laterally. One-dimensional (1D) geomechanical models, on the other hand, have log resolution along the wellbore but no penetration away from it—along the fracture length for instance. Combining borehole structural geology based on image data and finite elements (FE) geomechanics, we constructed and calibrated a 3D, high-resolution geomechanical model, including subseismic faults and natural fractures, over a 1,500- × 5,200- × 300-ft3
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Reports on the topic "Hydraulisk modell"

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Sharp, Jeremy, Locke Williams, Duncan Bryant, et al. Rough River Outlet Works physical model study. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/41043.

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The US Army Corps of Engineers, Louisville District, requested the support and assistance of the US Army Engineer Research and Development Center, Coastal and Hydraulics Laboratory (CHL), in the evaluation of the hydraulic performance of the replacement Outlet Works for Rough River Dam. To support the design effort, CHL constructed a 1:25.85 scale physical model. The proposed features of the model in the domain are the curved approach channel, intake structure, transition, curved conduit, stilling basin, concrete apron, and retreat channel. Tests performed to evaluate the hydraulic performance
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McKnight, C., David May, and Keaton Jones. Numerical analysis of dike effects on the Mississippi River using a two-dimensional Adaptive Hydraulics model (AdH). Engineer Research and Development Center (U.S.), 2022. http://dx.doi.org/10.21079/11681/46120.

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This report describes the hydraulic effects of dikes on water surface elevation (WSE) and velocities in the Mississippi River near Vicksburg, MS, from Interstate 20 to Highway 80 using a previously calibrated 2D Adaptive Hydraulics numerical model. Dike heights and their associated hydraulic roughness values were varied to quantify the overall effects of adjustments to dike fields. Steady flows characterized as low, medium, and high conditions were simulated. The WSE and velocity difference plots were generated to illustrate the hydraulic effects on the river under all scenarios discussed abov
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McAlpin, Tate, Gaurav Savant, Gang Zhao, John Petrie, and Madalyn Mouton. Numerical modeling of supercritical flow in the Los Angeles River : Part I : Adaptive Hydraulics numerical modeling of the 1943 physical model. Engineer Research and Development Center (U.S.), 2023. http://dx.doi.org/10.21079/11681/46631.

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The Los Angeles District of the US Army Corps of Engineers is assisting the City of Los Angeles with restoration efforts on the Los Angeles River. The city wishes to restore portions of the channelized river to a more natural state with riparian/vegetative green spaces for both wildlife and public recreation usage. The Los Angeles River provides an important role for the City of Los Angeles from a flood-control perspective, and functionality needs to be preserved when contemplating system modifications. This report details the development of an Adaptive Hydraulics (AdH) numerical model capable
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Harris, Aubrey, Jonathan AuBuchon, and Michael Porter. Comparing ecological models for assessing Rio Grande silvery minnow response to environmental flows. Engineer Research and Development Center (U.S.), 2024. http://dx.doi.org/10.21079/11681/48593.

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The proliferation of continuous streamflow monitoring and spatial data suitable for hydraulic modeling is increasing opportunities to use hydraulic habitat analysis to inform ecological models. However, species population and streamflow data exhibit high variability, making it challenging to identify hydrologic and hydraulic metrics that effectively correlate with ecological outcomes. Metric selection presents a challenge for informing environmental flow decisions and adaptive management of water infrastructure. This study applies models to characterize environmental flows with in-creasing mod
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Sanz-Ramos, M., and E. Bladé. Iber v3. Reference manual and GUI. Non-Newtonian shallow flows calculation module. Flumen, 2025. https://doi.org/10.23967/iber.2025.02.

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Iber is a two-dimensional hydraulic model for the simulation of free surface flow in rivers and estuaries, and the simulation of environmental processes in fluvial hydraulics. Since the release of the first version of Iber, which included a hydrodynamic calculation engine fully coupled with sediment transport processes and turbulence, it has evolved to become a free surface flow modelling tool for highly complex environmental processes. This document presents the developments made for version 3, specifically, for the new calculation module for the simulation of shallow non-Newtonian flows call
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May, David, David Biedenharn, Tate McAlpin, and Ty Wamsley. Hydraulic dike effects investigation on the Mississippi River : Natchez to Baton Rouge. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/40539.

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This report documents an investigation of the hydraulic effects of dikes on water levels in the Mississippi River between Natchez, MS, and Baton Rouge, LA, conducted for the U.S. Army Corps of Engineers, Mississippi Valley Division, Vicksburg, MS. The investigation was conducted using a previously calibrated Natchez-to-Baton Rouge Adaptive Hydraulics numerical model. The objectives were to alter roughness and height variables associated with the dikes and overbanks encompassed in the numerical model and evaluate their effects on water surface elevations. This academic exercise provides an indi
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McAlpin, Jennifer, and Jason Lavecchia. Brunswick Harbor numerical model. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/40599.

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The Brunswick area consists of many acres of estuarine and marsh environments. The US Army Corps of Engineers District, Savannah, requested that the US Army Engineer Research and Development Center, Coastal and Hydraulics Laboratory, develop a validated Adaptive Hydraulics model and assist in using it to perform hydrodynamic modeling of proposed navigation channel modifications. The modeling results are necessary to provide data for ship simulation. The model setup and validation are presented here.
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McAlpin, Tate, John Petrie, Gaurav Savant, Daniel Savant, Angela Hogan, and Gary Brown. Numerical modeling of supercritical flow in the Los Angeles River : part II : existing conditions Adaptive Hydraulics numerical model study. Engineer Research and Development Center (U.S.), 2024. https://doi.org/10.21079/11681/49487.

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The Los Angeles District of the US Army Corps of Engineers is assisting the City of Los Angeles with restoration efforts on the Los Angeles River. The city wishes to restore portions of the channelized river to a more natural state with riparian green spaces for both wildlife and public recreation usage. The Los Angeles River provides an important role from a flood-control perspective, and functionality needs to be preserved when contemplating system modifications. This report details the development of an Adaptive Hydraulics numerical model capable of modeling this complex system consisting o
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Wildey, Timothy Michael, and Michael Scott Eldred. Propagation of model form uncertainty for thermal hydraulics using RANS turbulence models in Drekar. Office of Scientific and Technical Information (OSTI), 2012. http://dx.doi.org/10.2172/1051699.

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Fletcher, Bobby P. Baldhill Spillway. Hydraulic Model Investigation. Defense Technical Information Center, 1993. http://dx.doi.org/10.21236/ada269737.

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