hydraulic shear Articles

  • The Features of Shear-type Shredder

    Shear-type Shredder is a kind of size-reduction equipment. ...


    By Harden Industries Ltd.

  • Effect of shear rate on the activity of enzymes used in hydraulic fracture cleanup of tight unconventional reservoirs

    Injection of polymeric solutions in order to propagate a fracture and carry proppants to keep the fracture open is a common practice in hydraulic fracturing of ultra–tight formations. Polymeric fluids open and extend the already existing network of fractures. Considering the low permeability of the formation, small width of the micro–fractures, and the importance of fracture cleanup during the ...


    By Inderscience Publishers

  • An Automated Electropneumatic Control System for Direct Simple Shear Testing

    This paper describes the design and implementation of an automated electropneumatic control system for direct simple shear testing of cohesive soils. The hardware and software used to perform automated application of consolidation increments and for subsequent constant volume shear of soil specimens is described in detail. Two servo-control algorithms are used to conduct a test, one for ...


    By ASTM International

  • Mechanism and kinetics of biofilm growth process influenced by shear stress in sewers

    Sewer biofilms play an important role in the biotransformation of substances for methane and sulfide emission in sewer networks. The dynamic flows and the particular shear stress in sewers are the key factors determining the growth of the sewer biofilm. In this work, the development of sewer biofilm with varying shear stress is specifically investigated to gain a comprehensive understanding of ...


    By IWA Publishing

  • Numerical analysis of hydraulic jumps using OpenFOAM

    The present paper deals with a hydraulic jump study, characterization and numerical modeling. Hydraulic jumps constitute a common phenomenon in the hydraulics of open channels that increases the shear stress on streambeds, so promoting their erosion. A three-dimensional computational fluid dynamics model is proposed to analyze hydraulic jumps in horizontal smooth rectangular prismatic open-air ...


    By IWA Publishing

  • Predicting apparent shear stress in prismatic compound open channels using artificial neural networks

    The apparent shear stress acting on the vertical interface between main channel and floodplain (with and without vegetation) in prismatic compound open channels was studied using artificial neural networks (ANNs). Apparent shear stress is commonly used to quantify the transverse momentum exchange between sub-areas of the cross section, and its influencing factors include channel geometry, ...


    By IWA Publishing

  • Influence of hydraulic retention time on UASB post-treatment with UF membranes

    A pilot UASB reactor coupled with an external ultrafiltration (UF) membrane was operated under three different hydraulic retention times (HRT) for domestic wastewater treatment. The aim was to assess the HRT influence on system performance and fouling. The highest concentrations of COD, total solids, extracellular polymeric substances (EPS) and soluble microbial products (SMP) in UASB effluent ...


    By IWA Publishing

  • Sludge Pump Sizing for the Pine Creek WWTP using Non-Newtonian Hydraulic Modelling

    In response to significant growth, the City of Calgary is currently building a third wastewater treatment facility, the Pine Creek Wastewater Treatment Plant (WWTP), to accommodate Calgary's immediate and long-term wastewater treatment needs. The first stage of this project will include a state-of-the-art 100 ML/day biological nutrient removal (BNR) wastewater treatment plant with tertiary ...

  • Concrete infilled Channels research at Colorado state university Hydraulics labratory - Case Study

    Geoweb® Cellular Confinement Systems are used for applications such as load support, earth retention, porous pavement, and slope and channel erosion protection. The product can also be utilized in the efficient formation of concrete structures such as levees, stream bank revetment, or slope protection, allowing for rapid installation without the use of stakes or the need for curing. A testing ...


    By Presto Geosystems

  • Adaptive control of algae detachment in regulated canal networks

    Open-channel distribution networks are subject to algal developments that can induce major disturbances such as clogging of hydraulic devices (pipes, weirs, filters, flow meters). Flushes can be used as a strategy to manage these algae developments. A flush is carried out by increasing the hydraulic shear conditions using hydraulic control structures of the canal network. In response to the ...


    By IWA Publishing

  • High performance vegetated solutions-research synopsis

    Research objective Measure performance of the Geoweb® (GW) material combined with a turf reinforcement mat (TRM) (integrated system) with topsoil infill and vegetation under varying shear stresses and flow rates to quantify both hydraulic forces and corresponding soil loss. The test consisted of a series of continuous one-hour flows over the GW-TRM system at incrementally increasing ...


    By Presto Geosystems

  • Selection pressure theory for aerobic granulation – an overview

    Aerobic granulation technology is an improvement over conventional activated sludge process, where cell-to-cell interactions lead to the formation of stable granules with excellent settleability. Selection pressures are the factors that can strongly influence the formation and growth of aerobic granules. Settling time and the volume exchange ratio (VER) will decide how long the bioparticles ...


    By Inderscience Publishers

  • European metal recycling case study

    Client: European Metal Recycling - Glasgow (Bellshill) Profile: Metal recycling facility Machine: Lindemann 825 EtaCut Machine type: Hydraulic shear Oil: Hydraulic fluid (Mineral) Brand: Millmax 46 Reservoir: 5000 litres Operating temp: 50 ...


    By Antech Hydraulics Ltd

  • The results exceeded our expectations

    After using a Lindemann scrap shear type LU 1250/15 PA 90/25 intensively for 21 years at its headquarters in ’s-Gravendeel, the Dutch firm HKS Scrap Metals found that the machine’s hydraulic system was not functioning up to par, as is inevitable with any system subject to wear and tear. As a result, production had dropped significantly – from 35 t/h to 22 t/h. The year was 2010, ...


  • Optimization of operation conditions for preventing sludge bulking and enhancing the stability of aerobic granular sludge in sequencing batch reactors

    Sludge bulking caused by loss of stability is a major problem in aerobic granular sludge systems. This study investigated the feasibility of preventing sludge bulking and enhancing the stability of aerobic granular sludge in a sequencing batch reactor by optimizing operation conditions. Five operation parameters have been studied with the aim to understand their impact on sludge bulking. ...


    By IWA Publishing

  • Automated Triaxial Testing of Soft Clays: An Upgraded Commercial System

    The paper evaluates the ability of a widely used automated commercial testing system to perform Ko consolidated-undrained triaxial compression and extension (CKoUC/E) tests on normally consolidated clay. The commercial system uses control software on a microcomputer to operate three digital pressure-volume controllers that control and measure the pore water pressure and volume, the radial stress, ...


    By ASTM International

  • Sweed model 5703 XHD magnetic separator system

    Built for the most extreme linear scrap challenges Model 5703 XHD Chopper Put four cable-annihilating rotary knives on a beefy 600 lb flywheel that’s driven by up to 60 HP of raw power and you have a super heavy-duty rotary shear with a serious appetite. Sweed’s taken their popular 5703 rotary shear, originally introduced in the early 90’s, and ...


    By Sweed Machinery, Inc.

  • Model Testing Optimizes and Verifies Design of a 200-MGD Trench Wet Well for the Sugar Creek WWTP

    Charlotte-Mecklenburg Utilities (CMUD) and CDM are currently involved in the design of several treatment plant upgrades at the Sugar Creek wastewater treatment plant (WWTP) in Charlotte, North Carolina. Implementation of this project, which includes a 200-million-gallonper- day (mgd) screenings and influent pump station with dual self-cleaning trench-type wet wells, will provide CMUD with the ...

  • Measuring the Dispersion Coefficient with Acoustic Doppler Current Profilers

    Abstract: A method is evaluated for estimating the longitudinal dispersion coefficient K from velocities and bathymetry measured with an acoustic Doppler current profiler #1;ADCP. If shear dispersion controls the mixing, the dispersion coefficient can be estimated from measurements of velocity and depth in a cross section. The dispersion coefficient has typically been measured by costly and ...


    By Teledyne RD Instruments

  • The small pumps with a big attitude

    Cardev International Ltd supplies a comprehensive range of environmental products commonly used in the maintenance and on-site recycling of industrial cutting fluids and oils, particularly hydraulic and turbine oils. Cardev’s standard range of OSCAR rigs incorporate several sizes of Mono M range pumps, including 110 volt systems for industrial recycling, and 24 volt systems mounted on the back of ...


    By NOV Mono - Mono Pumps Ltd

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