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Residence Time Distribution of a Cylindrical Microreactor
The Journal of Physical Chemistry B, 2005The residence time distribution for the flow of liquid reactants containing electrolytes in a cylindrical microreactor is derived under the conditions of constant surface potential and negligible end effects. The influences of the key parameters, including the thickness of the double layer, the strength of the applied electric field, and the magnitude ...
Jyh-Ping, Hsu, Tzu-Hsuan, Wei
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Random residence time distribution
Chemical Engineering Science, 1986Abstract A discrete stochastic mixing model for chemical reactors is presented. The model is particularly useful to study the statistics of RTD and of the output concentration in a chemical reactor. Some computations of confidence intervals of concentration using information about the stochastic nature of flow are presented.
Octavian Iordache, Sergiu Corbu
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Residence time distributions in mills
Cement and Concrete Research, 1971Abstract The determination of mean residence time is a powerful method for studying the hold-up in a cement mill, and hence whether the mill is operating in the required steel to clinker ratio. To determine the mean residence time accurately it is necessary to correct for the recycle of tracer, and a method of correction is given.
L.G. Austin, P.T. Luckie, B.G. Ateya
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RESIDENCE TIME DISTRIBUTIONS FOR DOUBLE-SCROLL ATTRACTORS
International Journal of Bifurcation and Chaos, 2007We investigated a choice of prototypical double-scroll attractors, namely trajectories resulting from Lorenz equations and from two sets of equations related to Chua's circuits. We found that the probability distribution for the residence times within a given scroll consists of prominent, exponentially decaying peaks.
Grete, Patrick, Markus, Mario
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Perspectives in residence-time distributions
Chemical Engineering Science, 1983Abstract A short history is given of the development of interest in residence-time distributions. Attention is concentrated on the role played in this development by Danckwerts' 1953 paper [6]. This defined the residence-time functions in the form now customarily used, and much subsequent development remains based on the approaches laid out in [6 ...
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Distribution and Expected Time of Residence for U.S. Households
Risk Analysis, 1992For risk assessments, the average current residence time (time since moving into current residence) has often been used as a surrogate for the average total residence time (time between moving into and out of a residence). Since the distributions of the two quantities are not necessarily the same, neither are their averages.
Miron, Israeli, Christopher B, Nelson
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Understanding Residence Time, Residence Time Distribution, and Impact of Surge Vessels
2020Axial dispersion and residence time distribution (RTD) have significant process implications in the design of continuous processes. Low dispersion is better for minimizing time for complete reaction and minimizing deviation boundaries. High dispersion is better for dampening out process fluctuations or disturbances.
Martin D. Johnson +8 more
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Residence Time Distribution Model for Soil Filters
Water Environment Research, 2004Pulse tracer tests were carried out to determine the residence time distribution (RTD) in earthworm‐cultured and uncultured, laboratory‐scale soil filters. A two‐parallel‐cell dispersion model for the mixing behavior in soil filters is presented; the model showed excellent fit to experimental data.
PATTANAIK, BR, GUPTA, A, SHANKAR, HS
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Residence times and distribution of residence times in dispersed flow systems
Chemical Engineering Science, 1959Abstract Mathematical expressions are derived for the residence time and the distribution of residence times of falling particles in a turbulent flow system.
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Measurement of residence times and residence-time distributions
1986It is not the intention of this chapter to treat exhaustively the theory of residence-time measurements; there are many excellent textbooks on the subject1,2. A brief review of ideal and non-ideal models, together with an indication of how the more important parameters of the models may be calculated, is sufficient for our purposes.
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