Journal ArticleDOI
Continuous flow systems. Distribution of residence times
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TLDR
In this article, the authors proposed a method to predict the distribution of residence-times in large systems by using distribution-functions for residencetimes, which can be used to calculate the etficiencies of reactors and blenders.About:
This article is published in Chemical Engineering Science.The article was published on 1995-12-01. It has received 1416 citations till now. The article focuses on the topics: Residence time distribution & Perfect mixing.read more
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A critical review of dispersion in packed beds
TL;DR: In this paper, the authors summarized and reviewed a great deal of information from the literature on dispersion in packed beds, and provided empirical correlations for the prediction of the dispersion coefficients (D T and D L) over the entire range of practical values of Sc and Pem.
Journal ArticleDOI
Age of stratospheric air: theory, observations, and models
Darryn W. Waugh,Timothy M. Hall +1 more
TL;DR: The relationship between tracer distributions and transport timescales in the stratosphere is discussed in this article, where the authors use the age spectrum, the distribution of transit times since stratospheric air last made tropospheric contact, to understand the transport information of tracers, how sensitive different tracers are to various transport processes and how to use tracers in combination to constrain transport rates.
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Concepts of solute leaching in soils: a review of modelling approaches
T. M. Addiscott,R. J. Wagenet +1 more
TL;DR: A number of conceptual models for solute leaching in soil are reviewed, quantitatively compared and classified as far as possible within a framework that makes distinction between deterministic and stochastic, mechanistic and functional and rate and capacity models.
Journal ArticleDOI
Perspective on theories of non-Fickian transport in heterogeneous media
TL;DR: In this paper, the authors focus on four approaches that give rise to nonlocal representations of advective and dispersive transport of nonreactive tracers in randomly heterogeneous porous or fractured continua.
Journal ArticleDOI
Direct Simulation of Groundwater Age
TL;DR: In this paper, a new method is proposed to simulate groundwater age directly, by use of an advection-dispersion transport equation with a distributed zero-order source of unit strength, corresponding to the rate of aging.
References
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Journal ArticleDOI
Mathematics of Adsorption in Beds. VI. The Effect of Longitudinal Diffusion in Ion Exchange and Chromatographic Columns
Leon Lapidus,Neal R. Amundson +1 more
Journal ArticleDOI
The Definition and Measurement of Some Characteristics of Mixtures
TL;DR: In this paper, it is shown that the important features of such mixtures can be expressed by two statistically defined quantities, the scale and the intensity of segregation, and methods of measuring these are suggested.