Results 61 to 70 of about 860,780 (248)

An attainable region perspective on the role of residence time distribution in ball milling

open access: yesSouth African Journal of Chemical Engineering, 2020
The effect of material flow through a ball mill on the efficient production of particles was explored using the attainable region framework. The target efficiency was the production of floatable particles of size between 300 μm and 75 μm upon expending ...
François K. Mulenga
doaj   +1 more source

Experimental simulation of salt transport in hierarchically nested groundwater flow systems

open access: yes地质科技通报, 2022
Groundwater age and groundwater residence time contain important information about groundwater circulation and evolutionary processes, and have been widely used in the study of groundwater circulation patterns in basins.In this paper, we simulated a ...
Hong Niu   +5 more
doaj   +1 more source

A Geometrical Model for Stagnant Motion in Hamiltonian Systems with Many Degrees of Freedom

open access: yes, 1998
We introduce a model of Poincar\'e mappings which represents hierarchical structure of phase spaces for systems with many degrees of freedom. The model yields residence time distribution of power type, hence temporal correlation remains long.
Konishi, Tetsuro   +1 more
core   +1 more source

Self-similarity of fluid residence time statistics in a turbulent round jet [PDF]

open access: yes, 2017
Fluid residence time is a key concept in the understanding and design of chemically reacting flows. In order to investigate how turbulent mixing affects the residence time distribution within a flow, this study examines statistics of fluid residence time
Bilger   +9 more
core   +2 more sources

Preparation and application of macromolecules with a fluorescence effect in polymer processing

open access: yesDesigned Monomers and Polymers, 2019
In this study, 9-anthracenemethyl methacrylate (AMMA) and styrene (St) as monomers and benzoyl peroxide as an initiator were used to synthesize P(St-co-AMMA), a macromolecule tracer with a fluorescence effect, via free radical copolymerization.
Meng-Di Chen   +4 more
doaj   +1 more source

Contribution of epilithic diatoms to benthic−pelagic coupling in a temperate river [PDF]

open access: yes, 2013
Water residence time in the middle course of rivers is often too short to allow substantial phytoplankton development, and primary production is essentially provided by benthic phototrophic biofilms.
Buffan-Dubau, Evelyne   +7 more
core   +4 more sources

Parametric Study of Residence Time Distributions and Granulation Kinetics as a Basis for Process Modeling of Twin-Screw Wet Granulation

open access: yesPharmaceutics, 2021
Twin-screw wet granulation is a crucial unit operation in shifting from pharmaceutical batch to continuous processes, but granulation kinetics as well as residence times are yet poorly understood.
Timo Plath   +3 more
doaj   +1 more source

Modelling and validation of synthesis of poly lactic acid using an alternative energy source through a continuous reactive extrusion process [PDF]

open access: yes, 2016
PLA is one of the most promising bio-compostable and bio-degradable thermoplastic polymers made from renewable sources. PLA is generally produced by ring opening polymerization (ROP) of lactide using the metallic/bimetallic catalyst (Sn, Zn, and Al) or ...
Abhyankar, Hrushikesh   +8 more
core   +3 more sources

Modeling of residence time distribution in regrinding Vertimill

open access: yesMinerals Engineering, 2013
Abstract The regrinding stage is necessary to achieve the particle size (liberation) for the final upgrade in the cleaning flotation process. At present, vertical stirred mills are increasingly employed at industrial scale. The regrinding process characterization requires mixing regime knowledge along with the mean residence time of the liquid and ...
Yianatos, J.   +3 more
openaire   +3 more sources

Deterministic SR in a Piecewise Linear Chaotic Map [PDF]

open access: yes, 1998
The phenomenon of Stochastic Resonance (SR) is observed in a completely deterministic setting - with thermal noise being replaced by one-dimensional chaos.
Chakrabarti, Bikas K., Sinha, Sitabhra
core   +2 more sources

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