Relevant bibliographies by topics / Hindered settling function

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Academic literature on the topic 'Hindered settling function'

Author: Grafiati
Published: 4 June 2021
Last updated: 13 February 2022

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Journal articles on the topic "Hindered settling function"

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Stricker, A. E., I. Takács, and A. Marquot. "Hindered and compression settling: parameter measurement and modelling." Water Science and Technology 56, no. 12 (December 1, 2007): 101–10. http://dx.doi.org/10.2166/wst.2007.786.

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The Vesilind settling velocity function forms the basis of flux theory used both in state point analysis (for design and capacity rating) and one-dimensional dynamic models (for dynamic process modelling). This paper proposes new methods to address known shortcomings of these methods, based on an extensive set of batch settling tests conducted at different scales. The experimental method to determine the Vesilind parameters from a series of bench scale settling tests is reviewed. It is confirmed that settling cylinders must be slowly stirred in order to represent settling performance of full s
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Davis, Robert H., and Hatice Gecol. "Hindered settling function with no empirical parameters for polydisperse suspensions." AIChE Journal 40, no. 3 (March 1994): 570–75. http://dx.doi.org/10.1002/aic.690400317.

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Zhu, Zhongfan, Hongrui Wang, Dingzhi Peng, and Jie Dou. "Modelling the Hindered Settling Velocity of a Falling Particle in a Particle-Fluid Mixture by the Tsallis Entropy Theory." Entropy 21, no. 1 (January 11, 2019): 55. http://dx.doi.org/10.3390/e21010055.

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The settling velocity of a sediment particle is an important parameter needed for modelling the vertical flux in rivers, estuaries, deltas and the marine environment. It has been observed that a particle settles more slowly in the presence of other particles in the fluid than in a clear fluid, and this phenomenon has been termed ‘hindered settling’. The Richardson and Zaki equation has been a widely used expression for relating the hindered settling velocity of a particle with that in a clear fluid in terms of a concentration function and the power of the concentration function, and the power
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Mazzolani, G., F. Pirozzi, and G. d'Antonoi. "A generalized settling approach in the numerical modeling of sedimentation tanks." Water Science and Technology 38, no. 3 (August 1, 1998): 95–102. http://dx.doi.org/10.2166/wst.1998.0184.

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Numerical models for the prediction of turbulent flow field and suspended solid distribution in sedimentation tanks are characterized by refined modeling of hydrodynamics, but apparently weak modeling of settling properties of suspensions. It is known that sedimentation tanks typically treat highly heterodisperse suspensions, whose concentrations range from relatively high to low values. However, settling is modeled either by considering one or more particle classes of different settling velocity, without accounting for hindered settling conditions, or by treating the suspension as monodispers
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Usher, Shane P., and Peter J. Scales. "Steady state thickener modelling from the compressive yield stress and hindered settling function." Chemical Engineering Journal 111, no. 2-3 (August 2005): 253–61. http://dx.doi.org/10.1016/j.cej.2005.02.015.

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Bürger, Raimund, Julio Careaga, Stefan Diehl, Ryan Merckel, and Jesús Zambrano. "Estimating the hindered-settling flux function from a batch test in a cone." Chemical Engineering Science 192 (December 2018): 244–53. http://dx.doi.org/10.1016/j.ces.2018.07.029.

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Bürger, Raimund, Stefan Diehl, Sebastian Farås, Ingmar Nopens, and Elena Torfs. "A consistent modelling methodology for secondary settling tanks: a reliable numerical method." Water Science and Technology 68, no. 1 (July 1, 2013): 192–208. http://dx.doi.org/10.2166/wst.2013.239.

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The consistent modelling methodology for secondary settling tanks (SSTs) leads to a partial differential equation (PDE) of nonlinear convection–diffusion type as a one-dimensional model for the solids concentration as a function of depth and time. This PDE includes a flux that depends discontinuously on spatial position modelling hindered settling and bulk flows, a singular source term describing the feed mechanism, a degenerating term accounting for sediment compressibility, and a dispersion term for turbulence. In addition, the solution itself is discontinuous. A consistent, reliable and rob
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Rzayev, A. H., R. Sh Asadova, and V. M. Haqverdiyev. "CONTROL OF THE PROCESSES OF DYNAMIC SETTLING OF OIL EMULSION." ASJ. 2, no. 40 (September 9, 2020): 36–42. http://dx.doi.org/10.31618/asj.2707-9864.2020.2.40.22.

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A systematic analysis of the state of the art in the methods for enhancing processes of thermochemical treatment of oil is carried out. A new method and a new system for controlling the process of dynamic settling of oil emulsion (OE) is developed, which allows increasing the efficiency of managing the process of dynamic settling by more accurately measuring the degree of phase separation, while avoiding the process of “flooding”. The mechanism of formation of an electrical double layer around emulsified water droplets (EWD) and the interaction energy of these droplets as a distance function i
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Bürger, R., J. Careaga, and S. Diehl. "A review of flux identification methods for models of sedimentation." Water Science and Technology 81, no. 8 (March 11, 2020): 1715–22. http://dx.doi.org/10.2166/wst.2020.113.

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Abstract Most models of sedimentation contain the nonlinear hindered-settling flux function. If one assumes ideal conditions and no compression, then there exist several theoretically possible ways of identifying a large portion of the flux function from only one experiment by means of formulas derived from the theory of solutions of partial differential equations. Previously used identification methods and recently published such, which are based on utilizing conical vessels or centrifuges, are reviewed and compared with synthetic data (simulated experiments). This means that the identificati
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Cunha, F. R., G. C. Abade, A. J. Sousa, and E. J. Hinch. "Modeling and Direct Simulation of Velocity Fluctuations and Particle-Velocity Correlations in Sedimentation." Journal of Fluids Engineering 124, no. 4 (December 1, 2002): 957–68. http://dx.doi.org/10.1115/1.1502665.

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In this paper we present direct numerical simulations of monodisperse and polydisperse suspensions of non-Brownian particles sedimenting at low Reynolds number. We describe a scheme to generate ergodic ensembles of random particulate systems and a numerical procedure for computing interactions among spherical particles based on Ewald summation technique for hydrodynamic mobility tensors. From the generation process truly random both monodisperse and multimodal size distributions of particles were obtained for dilute and moderate densities based on a minimum energy criterion. Concerned with com
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Dissertations / Theses on the topic "Hindered settling function"

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Kurt, Nilufer, and nilf_k@yahoo com au. "A Study of Channelling Behaviour in Batch Sedimentation." RMIT University. School of Civil and Chemical Engineering, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20061220.120258.

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Batch sedimentation is a method that enables us to understand the mechanism of compaction and compression of sedimenting slurry. However, batch settling behaviour is a very complex phenomenon that is not easily described fully by a mathematical model. This causes unrealistically large empirical calculations when the thickener size estimations are required. Channelling, reverse concentration gradients and the initial concentration of the slurry have large effects on batch settling. Existing procedures do not provide clear relationships involving these three significant variables. In this stud
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Conference papers on the topic "Hindered settling function"

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Bamberger, Judith Ann, and Perry A. Meyer. "Characterizing Pulsating Mixing of Slurries." In ASME/JSME 2007 5th Joint Fluids Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/fedsm2007-37666.

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This paper describes the physical properties for defining the operation of a pulse jet mixing system. Pulse jet mixing systems operate with no moving parts located in the vessel or in the fluid to be mixed. Pulse tubes submerged in the vessel provide a pulsating flow that mixes the fluid due to a controlled combination of applied pressure to expel the fluid from the pulse tube nozzle followed by suction to refill the pulse tube through the same nozzle. For mixing slurries nondimensional parameters to define mixing operation include slurry properties, geometric properties and operational parame
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Hrma, Pavel, and Jesse Alton. "Dissolution and Growth of Spinel Crystals in a High-Level Waste Glass." In ASME 2001 8th International Conference on Radioactive Waste Management and Environmental Remediation. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/icem2001-1323.

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Abstract A large fraction of HLW glass readily precipitates spinel. The presence of solid particles, including spinel crystals, is undesirable in a high-level waste (HLW) glass melter because the settling of solids can disrupt melter operation and shorten melter lifetime. Spinel formation in the melter can be reduced by lowering waste loading. When formulating HLW glass to maximize waste loading (thus minimizing the cost), the settling of insolubles must be considered. The rate of nucleation, growth, and dissolution of spinel crystals in a molten HLW glass was measured as a function of tempera
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Pease, Leonard F., Judith Ann Bamberger, and Michael J. Minette. "Erosion Front Patterns in Pulse Jet Mixed Vessels." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-71133.

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Here we observe the spatial and temporal patterns that erosion fronts driven by pulsed radial wall jets develop in double ring arrays of pulse tubes within slurry mixing vessels with curved bottoms. Although erosion of unbounded particle beds driven by individual steady jets has been studied for decades, the patterns developed within mixing vessels as neighboring transient erosion fronts collide and the subsequent relaxation of the particle bed towards the vessel center when the jets stop (i.e., as the pulse tubes refill within mixing vessels) remain incompletely understood. Relaxation here re
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