نتایج جستجو برای: Clogging

تعداد نتایج: 1525  

ژورنال: علوم آب و خاک 2017

Drip irrigation is one of the new irrigation methods for optimum use of water resources and increase of irrigation efficiency. The emitters' clogging is the most important problem in these systems. The physical clogging is the most important factor in reducing the discharge and emission uniformity of emitters. The emitter position on the laterals and emitter spacing are the factors that affect ...

2017
SURESH .V YASHWANTH REDDY P.PRASHANT KUMAR

Here in this paper a MAC layer level clogging detection system has been projected. The planned model aims to explore a system to compute the degree of clogging at victim node with maximal accuracy. This clogging detection apparatus is integrated with a Two-Step Cross Layer Clogging Control Routing Topology. The proposed model involves controlling of clogging in two steps with effective energy c...

2004
K. G. Rackers B. G. Thomas

Nozzle clogging is a serious productivity and quality problem in continuous casting. This work reviews the causes, effects, and solutions to clogging in continuous casting nozzles. The results of a one-dimensional, steady state analysis of the heat loss from the molten steel stream through the nozzle wall are discussed. The analyses show that steel may freeze within the clog matrix for a relati...

Journal: :Water research 2010
Jung-Woo Kim Heechul Choi Yakov A Pachepsky

Aquifer recharge for the wastewater reuse has been considered and studied as a promising process to cope with the worldwide water scarcity. Soil clogging by an excessive growth of bacteria is often accompanied with the aquifer recharge. In this study, biofilm morphology and hydraulic conductivity were concurrently characterized at two flow rates and two levels of substrate concentrations. The e...

2007
X. Xu

Some collective behavior during escape panic such as the ‘faster-is-slower effect’ and the irregular outflow are associated with clogging. The reasons for clogging appearance are investigated with a multi-grid model which is presented in previous work. The model implements finer discretization which leads to clogging effects in the dynamics. The effects of the exit width and the interactions ca...

2008
O. Vázquez-Mena G. Villanueva M.A.F. van den Boogaart V. Savu J. Brugger

One of the major advantages of stencil lithography is the possibility to use stencils many times. However, when stencils contain nanoapertures, the clogging of the membranes limits the useful life time of the stencils. The clogging is due to the accumulation of material deposited inside the apertures of the stencil. Here, we report a study on the effect of the clogging on the life time of stenc...

Journal: :پژوهش آب در کشاورزی 0

water crisis is one of the basic problems in the arid and drought prone areas like iran. this condition in the recent years has aggravated due to drought phenomenon. thus, using poor water quality has increased in areas where good quality is not available. in this study, in order to investigate clogging, 5 types of emitters including micro flapper, netafim, corona, axios and iran drip were test...

2008
Lakshmi N. Reddi

This paper addresses the differences in the extent of clogging associated with fine particle transport in soils and geotextiles. A common experimental set-up was designed for soil and geotextile filtration. Tests were conducted using a nonwoven, needle-punched geotextile filter sample permeated with fine particle suspensions under constant flow rate. The results were compared with those from si...

Journal: :Journal of environmental management 2013
G F Hua L Li Y Q Zhao W Zhu J Q Shen

This paper presents an integrated model of substrate clogging in a vertical flow constructed wetland (VFCW). The model simulates the reduction of pore space in the wetland substrate due to combined influences of various physical, biogeochemical and plant-related processes. A series of experiments based on laboratory-scale VFCWs were conducted to examine and measure key parameters related to clo...

2016
T. van de Laar S. ten Klooster K. Schroën J. Sprakel

Clogging is one of the main failure mechanisms encountered in industrial processes such as membrane filtration. Our understanding of the factors that govern the build-up of fouling layers and the emergence of clogs is largely incomplete, so that prevention of clogging remains an immense and costly challenge. In this paper we use a microfluidic model combined with quantitative real-time imaging ...

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