The MIIS Eprints Archive: No conditions. Results ordered -Date Deposited. 2019-04-20T16:24:01ZEPrintshttp://www.maths-in-industry.org/images/sitelogo.gifhttp://www.maths-in-industry.org/miis/2011-12-09T17:01:47Z2015-05-29T20:04:40Zhttp://www.maths-in-industry.org/miis/id/eprint/459This item is in the repository with the URL: http://www.maths-in-industry.org/miis/id/eprint/4592011-12-09T17:01:47ZModelling and simulation of a vibroformer for carbon anodes used in aluminium productionCarbon anodes for aluminium smelting furnaces are formed by a vibration-compaction process. One seeks to control the operation of the vibroformer so as to optimise the properties of the anodes. A non-linear model of the vibroformer dynamics is formulated, solutions are computed and compared with data, and inferences about the compaction process are drawn.D. Gates2011-12-09T16:59:17Z2015-05-29T20:04:37Zhttp://www.maths-in-industry.org/miis/id/eprint/458This item is in the repository with the URL: http://www.maths-in-industry.org/miis/id/eprint/4582011-12-09T16:59:17ZSlurry behaviour in separation devicesFour different modelling approaches for slurry behaviour in cyclones are considered: bulk flow models, a simple continuum model, hydrodynamic models and so-called wet granular flow models. The aim is to consider the utility of each approach for design purposes. It is concluded that bulk flow models and the simple continuum model are inadequate for such use, principally because they are unable to account for geometrical effects which affect the flow. However, both the hydrodynamic models and the wet granular flow approach show considerable promise for the task, due to recent increases in computer power and improved models and algorithms. Of these two approaches, the hydrodynamic models are the more mature, but the wet granular flow approach has the advantage of being based explicitly on particle motion.D. Jenkins2011-12-09T16:56:40Z2015-05-29T20:04:34Zhttp://www.maths-in-industry.org/miis/id/eprint/457This item is in the repository with the URL: http://www.maths-in-industry.org/miis/id/eprint/4572011-12-09T16:56:40ZRolling mill performanceA rolling mill may be modelled as a number of inertial masses coupled by torsional springs. The question considered by the Study Group was whether the parameters of the system could be determined from measurements of the torques and accelerations at a number of points in the system. A number of related aspects such as resonances, torque amplification factors and parameter identification were also examined. The group concluded that frequency analysis and lumped mass models were potentially useful for the analysis of rolling mill performance.F. Hoog2011-12-09T16:53:20Z2015-05-29T20:04:30Zhttp://www.maths-in-industry.org/miis/id/eprint/456This item is in the repository with the URL: http://www.maths-in-industry.org/miis/id/eprint/4562011-12-09T16:53:20ZOptimal surface cuttingSurface cutting problems in two dimensions are considered for nonrectangular items. An exact solution method is discussed. Outlines of several possible heuristic algorithms are also presented. For the heuristic methods a first approximation to the optimal solution is obtained by encompassing each item by a rectangle and then using some available strategy for this standard problem. Different approaches are then suggested for more accurate methods.J. Murray2011-12-09T16:51:24Z2015-05-29T20:04:26Zhttp://www.maths-in-industry.org/miis/id/eprint/455This item is in the repository with the URL: http://www.maths-in-industry.org/miis/id/eprint/4552011-12-09T16:51:24ZAtomisation of molten ZincZinc dust is produced by an atomisation process in which air at 17 atmospheres pressure is directed through a narrow annular nozzle surrounding a stream of molten zinc. Industrially, it is important to control the size distribution of zinc particles. It is therefore necessary to understand the features of the process, guided where appropriate by simple mathematical models and estimates. This report examines qualitative features using simple models for number of drops produced, estimates for air speed and swirl, heat transfer in the molten zinc and droplets, and droplet collisions and stability. Results from a literature survey are presented. At this stage, the construction of more elaborate mathematical models for the process is not warranted; rather, we expect that better understanding of the process requires an experimental program involving flow visualisation.N. Barton2011-12-09T16:48:11Z2015-05-29T20:04:23Zhttp://www.maths-in-industry.org/miis/id/eprint/454This item is in the repository with the URL: http://www.maths-in-industry.org/miis/id/eprint/4542011-12-09T16:48:11ZAirline crew schedulingAn airline must cover each flight leg with a full complement of cabin crew in a manner consistent with safety regulations and award requirements. Methods are investigated for solving the set partitioning and covering problem. A test example illustrates the problem and the use of heuristics. The Study Group achieved an understanding of the problem and a plan for further work.G. Mills