Multiphase catalytic reactions are prominent in chemical engineering; however it is difficult to achieve efficient reactions. Computational fluid dynamics (CFD) software simulates fluid flow so interactions between phases may be analyzed and improved. This project included use of CFD to simulate an experiment on multiphase flow to compare results on flow regime and pressure drop. Results includ...

The Cauchy problem for the Poisson-Nernst-Planck/Navier-Stokes model was investigated by the first author in [Transport Theory Statist. Phys. 31 (2002), 333–366], where a local existence-uniqueness theory was demonstrated, based upon Kato’s framework for examining evolution equations. In this article, the existence of a global weak solution is proved to hold for the model, in the case of the in...

A one-dimensional, unsteady mathematical model is presented of fixed-bed countercurrent wood gasifiers, which couples heat and mass transport with wood drying and devolatilization, char gasification, and combustion of both char and gas-phase species. The model is used to simulate the structure of the reaction fronts and the gasification behavior of a laboratory-scale plant as the reactor throug...

This paper presents the integrated process design and controller design (IPDC) for a reactorseparator-recycle (RSR) system and evaluates a decomposition methodology to solve the IPDC problem. Accordingly, the IPDC problem is solved by decomposing it into four hierarchical stages: (i) preanalysis, (ii) design analysis, (iii) controller design analysis, and (iv) final selection and verification. ...

The threat of bacterial contaminants in water distribution systems and in the environment is of unremitting concern for environmental engineers. This problem is compounded by the overuse of antibiotics and the resulting increased prevalence of antibiotic resistant pathogens in engineered waste streams and hospital wastewater effluents. Through defects in sewer systems these pathogens are furthe...

1 Department of Physics and Astronomy, Georgia State University, 29 Peachtree Center Ave, Atlanta, GA 30303, USA 2 Institut für Festkörperphysik, Technische Universität Berlin, Berlin, Germany 3 School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA 4 Dept. Electrical & Computer Engineering, University of North Carolina Charlotte, Charlotte, NC 28...

Fast Breeder Test Reactor (FBTR) operating at IGCAR since 1985 is testimony of maturity India has attained in Fast Breeder Technology. The reactor has operated exceedingly well thus established the competence of Indian engineers in handling this difficult technology where large quantity of sodium is used for cooling of reactors. INDIA took quantum leap from 40 MWe FBTR to launch of 500 MWe Fast...

In traditional engineering industries it is common to reuse tried and trusted components as one of the means of ensuring safety. Some low-level software components, e.g. libraries, are reused, but there are difficulties in justifying the reuse of software due to the complexity of interactions in a typical software system. This paper addresses the issue of reusing software applications by consid...

For a better understanding and description of the mass transport phenomena in dense multiphase gas-solids systems such as fluidized bed reactors, detailed and quantitative experimental data on the concentration profiles is required, which demands advanced non-invasive concentration monitoring techniques with a high spatial and temporal resolution. A novel technique based on the selective detect...

The present work aims to employ evolutionary algorithms (EAs) to optimize an industrial chemical process. A unique combination of the simplified fundamental theory and direct hands-on computer simulation is used to present the modeling of a dynamic chemical engineering process in a highly understandable way. The main aim is to use them for analysis of dynamical system behaviour, especially of a...