نتایج جستجو برای: different pipes

تعداد نتایج: 1769966  

2012
Jonathan D. Tonkin

The application of mussel spat rope for enabling the passage of redfin bully Gobiomorphus huttoni through culverts, which create velocity barriers, was trialled in the laboratory. No fish were able to access the un-roped control pipes whereas 52% successfully negotiated the pipes in the rope treatments. The success of fish ascending treatment pipes suggests mussel spat rope may be effective for...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2010
sayed hossein karparvarfard azam vakili farahani

in order to increase the efficiency of the conveyance of the granular solids, a new experimental set-up is designed. the test rig has longitudinal trapezoidal slots in its conveying pipes. through experimentation, a correlation for friction factor in terms of solid mass flow rate, fluid flow rate and froude number is presented. it is shown that the mixture friction factor for pipes with inner t...

2009
Melanie Hartmann Frederik Janssen David Hauger Mirjam Köck Andreas Nauerz

In this paper we demonstrate the GrappleUser Modeling Framework (GUMF), which ex-ploits Semantic Web technologies and Web 2.0paradigms to model users across different appli-cations and domains. It introduces novel featuressuch as dataspaces, which logically bundle userdata, and user pipes, which allow to mash up userdata from different sources.

2009
Rinaldo M. Colombo Mauro Garavello

Consider a fluid flowing through a junction between two pipes with different sections. Its evolution is described by the 2D or 3D Euler equations, whose analytical theory is far from complete and whose numerical treatment may be rather costly. This note compares different 1D approaches to this phenomenon. 2000 Mathematics Subject Classification: 35L65

This paper experimentally studies the heat absorption performance of a heat sink with vertical embedded heat pipes in the aluminum blade. The cooling system with embedded heat pipes distributes heat from the CPU to both the base plate and the heat pipes, and then transfer heat from fins to the Environment. The thermal resistance and heat transfer coefficient are evaluated for natural convection...

ژورنال: مهندسی دریا 2016
حکیم زاده, حبیب, مصاحبی محمدی, مهران,

In this paper, flow separations at downstream of piggyback pipelines due to the steady current have experimentally been investigated for various Reynolds numbers, gap ratios and relative diameters of the two pipes. A number of experiments including 6 verification tests and 50 main tests were conducted in a channel with length of 10m, width of 0.3m and 0.5m depth using Teflon rods (PTFE) with di...

2008
Lihua SHEN Yuemin WANG Fengrui SUN Fan ZENG Chuanjun SHEN

As one of key techniques for guided waves NDT based on magnetostrictive effect, the transducer is a “bridge” which plays an important role in practical inspection. In the experiments, we find that the guided wave echo-signals detected in pipes are affected by the position of the magnetostrictive transducer. First, guided waves’ generation mechanism and its propagating characteristics in pipes a...

2014
Lorraine Waller Ann Berrington James Raymer

There have been important changes in the United Kingdom’s (UK) fertility and immigration in the past decade, with a large share contributed by migrants from Poland. A detailed understanding of Polish migrant fertility is lacking, however, because the relevant data are not routinely collected. This paper provides new insights into the fertility patterns of Polish migrants in the UK, and compares...

The development of mathematical models for describing the dynamic behaviours of fluid conveying pipes, micro-pipes and nanotubes under the influence of some thermo-mechanical parameters results into nonlinear equations that are very difficult to solve analytically. In cases where the exact analytical solutions are presented either in implicit or explicit forms, high skills and rigorous mathemat...

The present work investigates the effect of the elliptical three-dimensional (3D) cracks on a pipe with thickness transition, considering internal pressure. Level sets were defined using the extended finite element method (XFEM), the stress intensity factors (SIFs) of 3D cracks were investigated and compared between straight pipes and pipes with thickness transition. The results show that the X...

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