Solutions to the Bernoulli Integral of the Funnel Flow

1999 ◽  
Vol 527 (2) ◽  
pp. 910-917 ◽  
Author(s):  
Jianke Li ◽  
Greg Wilson
Keyword(s):  
Funnel Flow ◽  
Bernoulli Integral

scholarly journals Rheology, fresh and hardened properties of self-consolidating concrete utilizing metal and PVA polymer fibers

2021 ◽  
Author(s):  
Moustafa M Sammour
Keyword(s):  
Flexural Strength ◽  
Fracture Energy ◽  
Strength Properties ◽  
Fiber Reinforced Concrete ◽  
Fiber Types ◽  
Fiber Reinforced ◽  
Segregation Index ◽  
Self Consolidating Concrete ◽  
Funnel Flow ◽  
Energy Absorbing

Fiber reinforced self-consolidating concrete (FRSCC) has a tremendous potential to be used in construction industry as it combines the advantagees of both self-consolidating concrete (SCC) and fiber reinforced concrete (FRC). 18 concrete mixtures were developed by incorporating differenct volumes (0 to 0.3) of polyvinyl alchohol (PVA) and metallic fibers. Fresh, rheological, mechanical and durability (in terms of chloride penetration resistance) properties of all FRSCC mixtures were evaluated. The influences of fiber types/size/ dosages and fiber combination (used in hybrid mixes) on fresh (slump flow, L-box passing ability, V-funnel flow time and segregation index), rheological (plastic viscosity and yield stress) and hardened (fracture energy and compressive/flexural/splitting tensile strength) properties were critically analyzed to examine the relationships among various properties as well as to suggest suitable FRSCC mixtures. The fibers (especially metallic ones) wre more effective in increasing the fracture energy of FRSCC than compressive/splitting tensile/flexural strength. A fracture energy gain of about 730% was observed (which is substantial) compared to 10% of compressive strength, 39% of splitting tensil strength and 124% of flexural strength. The improved strength and fracture energy of FRSCC mixtures can significantly reduce the amount of tensile reinforcement and subsantially increase the energy absorbing capacity of concrete structures.

scholarly journals Application of electrical capacitance tomography and artificial neural networks to rapid estimation of cylindrical shape parameters of industrial flow structure

2016 ◽  
Vol 65 (4) ◽  
pp. 657-669 ◽  
Author(s):  
Hela Garbaa ◽  
Lidia Jackowska-Strumiłło ◽  
Krzysztof Grudzień ◽  
Andrzej Romanowski
Keyword(s):  
Electrical Capacitance Tomography ◽  
Cylindrical Shape ◽  
Electrical Capacitance ◽  
Flow Monitoring ◽  
Flow Parameters ◽  
Classic Approach ◽  
Artificial Neural ◽  
Funnel Flow ◽  
Capacitance Tomography

Abstract A new approach to solve the inverse problem in electrical capacitance tomography is presented. The proposed method is based on an artificial neural network to estimate three different parameters of a circular object present inside a pipeline, i.e. radius and 2D position coordinates. This information allows the estimation of the distribution of material inside a pipe and determination of the characteristic parameters of a range of flows, which are characterised by a circular objects emerging within a cross section such as funnel flow in a silo gravitational discharging process. The main advantages of the proposed approach are explicitly: the desired characteristic flow parameters are estimated directly from the measured capacitances and rapidity, which in turn is crucial for online flow monitoring. In a classic approach in order to obtain these parameters in the first step the image is reconstructed and then the parameters are estimated with the use of image processing methods. The obtained results showed significant reduction of computations time in comparison to the iterative LBP or Levenberg-Marquard algorithms.

Magnetized Accretion and Funnel Flow

1996 ◽  
Vol 469 ◽  
pp. 765 ◽  
Author(s):  
Jianke Li ◽  
Dayal T. Wickramasinghe ◽  
Guenther Ruediger
Keyword(s):  
Funnel Flow

What You Need to Know to Reliably Handle Waste Coal

2003 ◽  
Author(s):  
Roderick J. Hossfeld ◽  
David A. Craig ◽  
Roger A. Barnum
Keyword(s):  
Mass Flow ◽  
Systematic Approach ◽  
Flow Patterns ◽  
Handling System ◽  
Flow Problems ◽  
Energy Facility ◽  
Anthracite Culm ◽  
Funnel Flow ◽  
Major Consideration ◽  
Waste Coal

Many power producers have been designing for, or switching to waste coal. A major consideration when dealing with waste coal is the design of the fuel handling system. Since waste coal is typically finer and more cohesive and therefore harder to handle in silos, bunkers, chutes and feeders, design of the handling system for reliable, non-stagnant flow is essential. This paper describes a systematic approach to designing and retrofitting handling systems to avoid bulk solids flow problems. Potential trouble areas such as coal hoppers, silos, bunkers, and transfer chutes are discussed. Mass flow and funnel flow patterns that develop in silos and bunkers are presented. Funnel flow results in large stagnant regions, which are a major problem for coals that combust easily and are prone to problems such as arching and ratholing. Mass flow patterns, which eliminate the stagnant coal regions, are also explained. Coal properties and bunker designs that result in mass flow and funnel flow are described. Transfer chute design techniques to avoid pluggages, reduce dusting, and minimize chute wear are discussed. The Panther Creek Energy facility in Nesquehoning, Pennsylvania is used as an example where solids flow handling methodologies were used to solve handling problems with anthracite culm. The modifications presented were required for reliable, stagnant-free coal flow, which prevented belt slippage and high belt loading on gravimetric feeders.

Comparison of some Fresh and Hardened Properties of Self-Consolidating Concrete Composites Containing Rubber and Steel Fibers Recovered from Waste Tires

2019 ◽  
Vol 24 ◽  
pp. 8-13 ◽  
Author(s):  
Hamza Bensaci ◽  
Belkacem Menadi ◽  
Said Kenai
Keyword(s):  
Flexural Strength ◽  
Volume Fraction ◽  
Flow Time ◽  
Steel Fibers ◽  
Self Consolidating Concrete ◽  
Steel Fibres ◽  
Waste Tires ◽  
Slump Flow ◽  
Funnel Flow ◽  
Recycled Steel

This paper reports on an experimental investigation using either rubber aggregates or steel fibres recycled from waste tires in the production of self-consolidating concrete composite (SCCC). Ten mixes are designed, one of them is the reference concrete. The natural aggregates are substituted by rubber particles by volume at 5, 10, 15, 20 and 30%. Recycled steel fibres are separately added to SCC mixes at volume fraction of 0.5, 0.8, 1 and 1.5%. The tested rheological properties of SCCC are slump flow diameter, T500 slump flow time, V-funnel flow time, L-box ratio, and the segregation resistance test. The compressive strength, the flexural strength, and total shrinkage are also measured on the 28 days. The experimental results show that the addition of recycled steel fibre is favorable for the SCC by means of increasing the flexural strength and reducing the shrinkage and the risk of cracking. Keywords: Self-consolidating concrete composite; Waste tires; Rubber; Steel fibers; Rheology, Strength

Assessment and prediction of cement paste flow behavior; Marsh-funnel flow time and mini-slump values

2021 ◽  
Vol 301 ◽  
pp. 124072
Author(s):  
Ali Mardani-Aghabaglou ◽  
Hasan Tahsin Öztürk ◽  
Murat Kankal ◽  
Kambiz Ramyar
Keyword(s):  
Cement Paste ◽  
Flow Behavior ◽  
Flow Time ◽  
Marsh Funnel ◽  
Funnel Flow

3D Segmentation of Funnel Flow Boundary During Silo Emptying

2014 ◽  
Vol 19 (2-3) ◽  
pp. 141-149 ◽  
Author(s):  
Selam Waktola ◽  
Laurent Babout ◽  
Krzysztof Grudzien
Keyword(s):  
Image Segmentation ◽  
Interrogation Window ◽  
Stagnant Zone ◽  
In Situ Experiment ◽  
Flow Area ◽  
X Ray ◽  
3D Tomography ◽  
Flow Investigation ◽  
Ct System ◽  
Funnel Flow

Abstract The paper presents an automatic method for segmenting 3D tomography images of a funnel flow area, during silo emptying process. For generating 3D images the silo model was scanned using X-ray Computed Tomography (CT) system. The method has been applied for a chosen single slice from 3D image. The image segmentation is based on the variance of pixels calculation in defined interrogation window (or kernel). The analysis of Signalto- Noise-Ratio (SNR) of the given image allows to improve the contrast in the image and facilitate the detection the boundary between funnel area and stagnant zone. The obtained results of image segmentation show a high potential in the silo flow investigation using in-situ experiment using X-ray visualization. Additionally, the study indicates that, the separation of the silo area into the funnel and stagnant zone parts is a very challenging task especially for the top and bottom area of silo where the contrast is the smallest.

Influence of Calcium Carbonate Powder on Water Requirement and Flowability of Self-Compacting Mortar Incorporating Bagasse Ash

2014 ◽  
Vol 887-888 ◽  
pp. 789-792
Author(s):  
Natt Makul ◽  
Ratsamee Sangsirimongkolying ◽  
Somkid Soottitantawat ◽  
Laongtip Mathurasa
Keyword(s):  
Calcium Carbonate ◽  
Portland Cement ◽  
Electricity Generation ◽  
Flow Time ◽  
Water Requirement ◽  
Slump Flow ◽  
Funnel Flow

Bagasse ash (BA) is a plentiful byproduct obtained from the process of electricity generation during sugar manufacturing. We investigated the influence of adding calcium carbonate powder (CCP) to self-compacting mortar (SCM) mixtures. Type 1 Portland cement was replaced with 0%, 20%, and 40% as-received or ground BA and CCP by weight. Mixtures were designed to yield a slump flow spread of 25.0 cm in diameter. The water requirement and V-funnel flow time of each SCM mixture were determined.

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