Results 31 to 40 of about 257,394 (299)

On mean residence times in compartments [PDF]

open access: yesMathematical Biosciences, 1981
Abstract This paper is concerned with a set of parameters which measure the mean time a random particle resides in individual compartments in response to a given load distribution. These parameters are related to other time parameters and to each other.
openaire   +1 more source

Determination of the residence-time distribution in industrial dryer for the production of recycled polyester [PDF]

open access: yesChemical Industry and Chemical Engineering Quarterly, 2021
The study proposes the evaluation of the residence-time distribution (RTD) in situ in an industrial dryer for the production of recycled polyester fibers (PES) from colorless polyethylene terephthalate (PET) flakes without interruption of the production.
Zauli da Silva Felipe   +3 more
doaj   +1 more source

Design and Development of Mathematical Model for Static Mixer [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2016
A numerical model for simulating Residence Time Distribution (RTD) of turbulent flows in helical static mixers is proposed and developed to improve the understanding of static mixers.
Akila Rajamanickam, Krishnaswamy Balu
doaj  

Comment on mean residence time in flow systems [PDF]

open access: yesChemical Engineering Science, 1985
Critique d'un article de Awasthi et Vasudeva paru ibid., 1983, 38, 313, selon lequel le temps de sejour d'un systeme en ecoulement peut etre superieur au quotient du volume et du ...
Curl, Rane L., Mann, Uzi
openaire   +3 more sources

Numerical Simulations of a Gas–Solid Two-Phase Impinging Stream Reactor with Dynamic Inlet Flow

open access: yesEnergies, 2018
Fluid flow characteristics and particle motion behavior of an impinging stream reactor with dynamic inlet flow (both inlet velocity patterns exhibit step variation) are investigated and discussed with the computational fluid dynamics–discrete ...
Xueqing Liu   +4 more
doaj   +1 more source

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

Pre-event water contributions and streamwater residence times in different land use settings of the transboundary mesoscale Lužická Nisa catchment

open access: yesJournal of Hydrology and Hydromechanics, 2017
The objective of the study was to evaluate the spatial distribution of peakflow pre-event water contributions and streamwater residence times with emphasis on land use patterns in 38 subcatchments within the 687 km2 large mesoscale transboundary ...
Šanda Martin   +7 more
doaj   +1 more source

The residence time of water in the atmosphere revisited [PDF]

open access: yesHydrology and Earth System Sciences, 2017
This paper revisits the knowledge on the residence time of water in the atmosphere. Based on state-of-the-art data of the hydrological cycle we derive a global average residence time of 8.9 ± 0.4 days (uncertainty given as 1 standard deviation).
R. J. van der Ent, O. A. Tuinenburg
doaj   +1 more source

A continuous mashing system controlled by mean residence time

open access: yes, 2023
Continuous processes offer more environmentally friendlier beer production compared to the batch production. However, the continuous production of mashing has not become state-of-the-art in the brewing industry.
Schneider, Jan   +4 more
core   +1 more source

Onset velocity of circulating fluidization and particle residence time distribution: A CFD-DEM study

open access: yes, 2015
Until now, the onset velocity of circulating fluidization in liquid-solid fluidized beds has been defined by the turning point of the time required to empty a bed of particles as a function of the superficial liquid velocity, and is reported to be only
Han, Qiqi   +3 more
core   +1 more source

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