We show that residence time measures can be used to identify the geometrical and transmission properties of a defect along path. The model we study is based on one-dimensional simple random walk. sites lattice are regular, i.e., jumping probabilities same in each site, except for called defect, where different. At side an absorbing site present. by measuring fraction particles crossing channel ...

"> Experimental measurements of overall gas holdup (εg<span style="font-family: TimesNewRomanPS-ItalicMT; font-size: 10pt; c...

The residence time around di+erent parts of a chaotic attractor is studied experimentally for nonlinear dynamical system with a double-scroll. It is shown that the dynamics of jumping from one scroll of the attractor to the other produces a distinct low-frequency peak in the otherwise featureless noise-like background produced by the chaotic dynamics. This peak can be interpreted as a distribut...

Cephalothin (cefalotin) pharmacokinetics were evaluated for nine severely burned patients (42% +/- 9% mean burn areas) and five healthy volunteers by using non-plasma-protein-bound concentration-time profiles. Burn patients gave increased mean residence times (36%) and reduced total clearances (25%). Mean residence times and distribution volumes increased between 1 and 4 days posttrauma, sugges...

The potential for improved selectivity has made column flotation cells a popular choice for upgrading fine coal. Unfortunately, recent production data from full-scale column plants indicate that many industrial installations have failed to meet original expectations in terms of clean coal recovery. Theoretical studies performed using a simple dispersion model showed that this inherent shortcomi...

Hydraulic efficiency is a vital component in evaluating the disinfection capability of a contact system. Current practice evaluates these systems based upon the theoretical detention time (TDT) and the rising limb of the residence time distribution (RTD) curve. This evaluation methodology is expected because most systems are built based on TDT under a "black-box" approach to disinfection system...

The influence of particle residence time distribution on the average conversion rate (or reactivity) of particles undergoing a non-catalytic gas-solid reaction inside a continuously operated fluidized bed reactor is evaluated. A so-called &factor is defined as the ratio of the actual reactivity in the reactor and the reactivity of a batch of particles that react under similar circumstances and ...

a r t i c l e i n f o This review traces current applications of the residence time theory in various solid unit operations. Besides reviewing recent experimental and simulation studies in the literature, some common modeling and tracer detection techniques applied in continuous flow systems are also considered. We attempt to clarify and emphasize the influence of the residence time profile on ...