Industrial Shears Articles

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

by IWA Publishing  (Dec. 21, 2015)

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 ...

Probability distribution of turbulence in curvilinear cross section mobile bed channel

by IWA Publishing  (Dec. 16, 2015)

The present study investigates the probability density functions (PDFs) of two-dimensional turbulent velocity fluctuations, Reynolds shear stress (RSS) and conditional RSSs in threshold channel obtained by using Gram–Charlier (GC) series. The GC series expansion has been used up to the moments of order four to include the skewness and ...

Optimisation of micro-processes for shear-assisted solid–liquid separation in a rotatory batch flow vortex reactor

by IWA Publishing  (Aug. 6, 2015)

This paper reports the study of micro-processes in a novel pre-treatment technique using a pellet forming batch flow vortex reactor of cylindrical shape that consists of axially revolving rotor plates between fixed stator plates. The suspension was first mixed with high molecular weight synthetic polymers by stirring for approximately 50 ...

Numerical analysis of hydraulic jumps using OpenFOAM

by IWA Publishing  (Jul. 3, 2015)

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 ...

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

by Presto Geosystems  (May 7, 2015)

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 ...

Rotary batch mixer yields high-quality blends for powder metallurgy

by Munson Machinery Co., Inc.  (Dec. 9, 2014)

GKN Sinter Metals Inc. is the world's largest manufacturer of parts made by powder metallurgy, a molding process that produces complex shapes with a range of properties. Powder metallurgy offers benefits in part fabrication over competing metal processes. It is faster than forging or casting and permits the use of more performance-enhancing alloys ...

Glass blended rapidly with abrasion resistant rotary mixer

by Munson Machinery Co., Inc.  (Dec. 9, 2014)

While most reading this article may be unfamiliar with the Kopp Glass name, most are likely familiar with Kopp Glass products. From a humble beginning more than 80 years ago, as a manufacturer of red glass for railroad signals, Kopp now claims to be the world's leading producer of precision molded industrial quality technical glass.  The ...

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

by IWA Publishing  (Nov. 18, 2014)

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 ...

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 ...

Investigation on punching shear behaviour of multi–panel flat slab

by Inderscience Publishers  (Jul. 2, 2014)

Reinforced concrete multi–panel flat slabs subjected to punching shear are investigated in this study on the basis of finite element analysis. The study involves development of a non–linear material model strategy based on past experimental investigations which implements solution for a realistic description of punching shear of RC slabs for ...

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