All that is solid? Movement, repurposed lives and a cardboard citizenry

2018 ◽  
Vol 5 (3) ◽  
pp. 381-390
Author(s):  
Connie Zheng
Keyword(s):  
Solid Movement

Assessment of the effects of greywater reuse on gross solids movement in sewer systems

2013 ◽  
Vol 69 (1) ◽  
pp. 99-105 ◽  
Author(s):  
R. Penn ◽  
M. Schütze ◽  
E. Friedler
Keyword(s):  
Transport Model ◽  
Flow Characteristics ◽  
Solids Transport ◽  
Sewer Systems ◽  
Adoption And Implementation ◽  
Sustainability Research ◽  
Hydrodynamic Calculations ◽  
Urban Water Use ◽  
Solid Movement ◽  
Greywater Reuse

Onsite greywater reuse (GWR) and installation of water-efficient toilets (WETs) reduce urban freshwater demand and thus enhance urban water use sustainability. Research on GWR and WETs has generally overlooked their potential effects on municipal sewer systems: GWR and WETs affect the flow regime in sewers, and consequently also influence gross solids transport. To asses these impacts, a gross solids transport model was developed. The model is based on approaches found in the literature. Hydrodynamic calculations of sewage flow were performed using the SIMBA6 simulator and then used for the gross solid movement models. Flow characteristics in the up- and downstream sections of the sewer network differ. Therefore different approaches were used to model solids movement in each of these two parts. Each model determines whether a solid moves as a result of a momentary sewage flow, and if it moves, calculation of its velocity is possible. The paper shows the adoption and implementation of two gross solids transport models using SIMBA6 and depicts the results of the effects of various GWR and WET scenarios on gross solids movement in sewers for a real case study in Israel.

scholarly journals Modelling of macrosegregation in large steel ingot with considering solid movement

2009 ◽  
Vol 58 (13) ◽  
pp. 104
Author(s):  
Liu Dong-Rong ◽  
Sang Bao-Guang ◽  
Kang Xiu-Hong ◽  
Li Dian-Zhong
Keyword(s):  
Steel Ingot ◽  
Large Steel ◽  
Solid Movement

Movement mechanisms of gross solids in intermittent flow

2003 ◽  
Vol 47 (4) ◽  
pp. 45-50 ◽  
Author(s):  
K. Littlewood ◽  
D. Butler
Keyword(s):  
Flow Regime ◽  
Water Conservation ◽  
Small Diameter ◽  
Intermittent Flow ◽  
Transport Distance ◽  
Photographic Evidence ◽  
Transport Behaviour ◽  
Series Of Experiments ◽  
Solid Transport ◽  
Solid Movement

Gross solids, such as used tampons, sanitary towels and faecal stools, are introduced into the sewer network via the WC. Although small diameter pipes (≤ 150mm diameter) make up a large proportion of most sewer networks, the transport behaviour of gross solids in these smaller pipes is not fully established. In particular, there are concerns about the effect of water conservation measures on the transport of gross solids in the intermittent flow regime prevalent in small pipes. This paper introduces a study carried out on the movement of solids in this flow regime. An extensive series of experiments has been carried out to investigate the movement mechanisms and behaviour in detail. It was found that there are three different mechanisms of movement, and photographic evidence is provided in the paper. The concept and implications of the “limiting solid transport distance” is also introduced. It is argued that solid movement is dependent on factors other than just WC flush volume and that increased blockage potential is not inevitable.

Numerical simulation of macrosegregation with grain motion during solidification of Mg-4wt.%Y alloy

2016 ◽  
Vol 30 (36) ◽  
pp. 1650417 ◽  
Author(s):  
Qing Ya Sun ◽  
Dong-Rong Liu ◽  
Jian Jiao Zhang ◽  
Li Ping Wang ◽  
Er Jun Guo
Keyword(s):  
Numerical Simulation ◽  
Flow Behavior ◽  
Convection Heat Transfer ◽  
Bulk Liquid ◽  
Nucleation Density ◽  
Macroscopic Scale ◽  
Two Phase ◽  
Solidification Model ◽  
Solid Movement ◽  
Alloy Cast

A two-phase solidification model was used that incorporates the descriptions of natural convection, heat transfer, solute transport and solid movement at macroscopic scale with microscopic relations for grain nucleation and growth. The implementation of the two-phase model was validated by comparisons with a consensus of previous numerical simulation for Sn-5wt.%Pb alloy and with experiment for Mg-4wt.%Y alloy cast in one-side-chilled resin sand mould. With free movement of globular grains in the bulk liquid, effects of melt superheat and nucleation density on fluid flow behavior and macrosegregation during solidification of Mg-4wt.%Y alloy were numerically investigated. It was found that a lower melt superheat and a higher nucleation density decrease the severity of macrosegregation by weakening the flotation of grains.

A model for the movement of large solids in small sewers

2005 ◽  
Vol 52 (5) ◽  
pp. 69-76 ◽  
Author(s):  
D. Butler ◽  
K. Littlewood ◽  
N. Orman
Keyword(s):  
Amorphous Solids ◽  
Small Time ◽  
Model Parameters ◽  
Transport Distance ◽  
Long Run ◽  
Series Of Experiments ◽  
Calibration And Verification ◽  
Solid Transport ◽  
Solid Movement ◽  
Experimental Rig

An extensive series of experiments has been carried out to investigate the movement mechanisms and behaviour of large solids in small sewers. This paper describes the development, calibration and verification of a model (SOLID) based on data obtained from the experimental rig. It is used to predict solid movement with respect to ‘limiting solid transport distance’. Key model parameters are the coefficients of static and dynamic friction, the shape factor of amorphous solids and the flow bypass coefficient. The model is shown to successfully represent the movement of a large solid down a small pipe, where the solid is moving as a sliding, leaking dam, particularly the first ‘hop’. Limitations of the model include a limited facility to well represent multiple hops and the need for closely spaced computational nodes leading to small time steps, and long run times.

CFD Simulation of Fluid Dynamics in a Gas-Solid Jetting Fluidized Bed

2007 ◽  
Vol 5 (1) ◽  
Author(s):  
Qicheng Wang ◽  
Kai Zhang ◽  
Guogang Sun ◽  
Stefano Brandani ◽  
Jinsen Gao ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Fluidized Beds ◽  
Cfd Simulation ◽  
Fluid Model ◽  
Outer Region ◽  
Solid Material ◽  
Fundamental Parameters ◽  
Bed Height ◽  
Two Fluid Model ◽  
Solid Movement

A thorough understanding of fundamental parameters, such as transient and time-averaged gas and solid velocities, is helpful for designing and manipulating the gas-solid jetting fluidized beds. In this study, a new two-fluid model developed in our group is used to investigate numerically the gas and solid velocities in the gas-solid jetting fluidized beds by adding the user-defined Fortran subroutines in the platform of CFX 4.4, a commercial CFD software package. Simulation is carried out in a two-dimensional fluidized bed 2.0 m high and 0.3 m wide equipped with a nozzle in the centre at the inlet. Resin, belonging to Geldart B Group, is selected as the solid material. The numerical results show that the solid movement is predominantly upward in the center of the bed, whilst it is primarily downward in the outer region of the bed. Particles exchange between these two regions across their neighboring boundary. Gas interchange between the jet and the emulsion phase becomes obvious with the jet evolution. The time-averaged distributions of gas and solid velocities in the bed are greatly influenced by jet gas velocity, and the effect of the static bed height can be ignored. These numerical computations provide helpful information for designing and scaling up the jetting fluidized bed.

The Application of Image Entropy in the Recognition of Free Fluid Spread Motion

2014 ◽  
Vol 665 ◽  
pp. 685-690
Author(s):  
Ning Chen ◽  
Shu Sen Yang ◽  
Hui Ze Xu
Keyword(s):  
Pattern Recognition ◽  
Theoretical Analysis ◽  
Free Fluid ◽  
Practical Application ◽  
Free Diffusion ◽  
Image Entropy ◽  
Solid Movement ◽  
And Diffusion ◽  
Image Pattern

In this paper, we introduce the image entropy value into the image pattern recognition of movement, to distinguish the differences between solid movement and diffusion movement. Through the theoretical analysis of the fluid free diffusion movement, the characteristics of the movement were summed up, and the effect of the movement on images was studied. Through simulation and calculation of different movement, their effects on image entropy’s variation were summarized. Finally, through experiments, the image entropy’s variation in practical application was explored, and the results were analyzed. The result turns out to be positive.

Solid Movement: Mixing, Segregation, and Staging

1991 ◽  
pp. 211-235 ◽  
Author(s):  
Daizo Kunii ◽  
Octave Levenspiel
Keyword(s):  
Solid Movement

scholarly journals Collective Action NGO dalam Pencegahan Korupsi Pengadaan Barang/Jasa Pemerintah di Sulawesi Selatan

2019 ◽  
Vol 2 (2) ◽  
pp. 89
Author(s):  
Rifaid Rifaid ◽  
Zaldi Rusnaedy
Keyword(s):  
Collective Action ◽  
Media Coverage ◽  
Aggregation Method ◽  
State Institutions ◽  
Goods And Services ◽  
Governmental Organizations ◽  
South Sulawesi ◽  
Center Point ◽  
Non Governmental Organizations ◽  
Solid Movement

This article discusses the collective action of NGOs in guarding and advocating corruption cases in South Sulawesi, specifically the procurement of Center Point of Indonesia (CPI) goods/services. The NGOs in the coalition are engaged in collective action in guarding the corruption of CPI, in which the group is focused on behalf of the Anti Corruption Community Coalition (KMAK) of Sulawei, incorporated from various NGOs namely ACC Sulawesi, PeRAK Institute, KOPEL Indonesia, FIK Non-Governmental Organizations and YASMIB Sulawesi. Media engagement is key to KMAK's success in guarding the CPI corruption, as an aggregation method to achieve its goals. The mass media coverage of reports, monitoring and discussions conducted by KMAK has made a number of formal state institutions take a look at the CPI case. The solid movement established by KMAK has transformed into a civil society movement that maintains a common goal of guarding the procurement of goods and services.  Artikel ini menjelaskan tentang collective action NGO dalam mengawal dan mengadvokasi kasus korupsi di Sulawesi Selatan, khususnya kasus pengaadaan barang/jasa Center Point of Indonesia (CPI). Dengan menggunakan metode penelitian kualitatif, penelitian ini menunjukan tindakan kolektif yang dilakukan NGO dalam mengawal dugaan korupsi CPI yaitu dengan cara berkoalisi, dan kelompok NGO tersebut mengatasnamakan Koalisi Masyarakat Anti Korupsi (KMAK) Sulawesi, yang tergabung dari berbagai NGO seperti (ACC Sulawesi, PeRAK Institute, KOPEL Indonesia, FIK Ornop Sulsel dan YASMIB Sulawesi) sebagai bentuk collective action. Keterlibatan media menjadi kunci keberhasilan KMAK Dalam mengawal kasus korupsi CPI, dan juga sebagai metode agregasi untuk mencapai tujuannya.

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