This paper is devoted to the multiple input multiple output (MIMO) model predictive control (MPC) of a catalytic reverse flow reactor (RFR). The RFR aims to reduce, by catalytic reaction, the amount of volatile organic compounds (VOCs) released in the atmosphere. The peculiarity of this process is that the gas flow inside the reactor is periodically reversed in order to trap the heat released d...

This paper reviews the practice in reverse logistics through published literature. The objective of this study is to encourage and provide researchers with future research directions in reverse logistics. Since supply chains are designed for forward flow, integrating product recovery into the network design poses a major challenge. An important assignment of top management is to analyse the obs...

introduction nowadays, energy, water and environmental issues are the intersection of all human’s requisites. supplying energy from a wide range of clean sources is a reliable response in order to obtain all of the requisites of mankind. salinity gradient power is a clean energy source that is available everywhere and has the capacity of supplying a reasonable amount of energy suitable to be us...

One of the most important concerns of reverse logistics network design is to locate interacting facilities in an efficient and cost effective manner, which forms a typical hierarchical system with multiple layer configuration. Considering the hierarchical relationship and flow of waste among the different facility types, both single-flow pattern and multi-flow pattern are discussed in this pape...

► Self-adaptive mode of feed-flow reversal (FFR) was developed for RO desalting. ► FFR was triggered via mineral scale detection using an external membrane

We show experimental and computational evidence of a new structure: an undercompressive and reverse undercompressive shock for draining films driven by a surface tension gradient against gravity. The reverse undercompressive shock is unstable to transverse perturbations while the leading undercompressive shock is stable. Depending on the pinch-off film thickness, as controlled by the meniscus, ...

In this paper, we construct a new type of singularity which may occur in weak solutions of the harmonic map flow for two-dimensional domains. This " reverse bubbling " singu-larity may occur spontaneously, and enables us to construct solutions to the harmonic map heat equation which differ from the standard Struwe solution, despite agreeing for an arbitrarily long initial time interval.

In this study, the unique reverse-flow around inlet nozzle of a squirrel-cage fan was numerically studied by computational fluid dynamics (CFD), and non-axisymmetric D-type proposed to inhibit it. It is shown that serious back flow develops at volute tongue when operates low coefficient lower than best efficiency point. The airflow passing blade passages in reverse further crosses impeller, mix...