The MIIS Eprints Archive: No conditions. Results ordered -Date Deposited. 2021-08-05T15:43:09ZEPrintshttp://miis.maths.ox.ac.uk/images/sitelogo.gifhttp://miis.maths.ox.ac.uk/miis/2016-05-16T13:26:39Z2016-05-16T13:26:39Zhttp://miis.maths.ox.ac.uk/miis/id/eprint/693This item is in the repository with the URL: http://miis.maths.ox.ac.uk/miis/id/eprint/6932016-05-16T13:26:39ZRigorous and Approximated Solutions of the Consolidation Problem for a Soil Layer with Finite Thickness Under Cyclic Mechanical LoadingP. IlievS. StoykovB. MarkovićM. DatchevaL. YovkovK. LioliosC. MenseidovN. MuethingT. Barciaga2014-07-03T22:08:00Z2015-05-29T20:17:35Zhttp://miis.maths.ox.ac.uk/miis/id/eprint/664This item is in the repository with the URL: http://miis.maths.ox.ac.uk/miis/id/eprint/6642014-07-03T22:08:00ZUp and Beyond - Building a Mountain in the NetherlandsWe discuss the idea of building a 2 km high mountain in the Netherlands. In this paper, we give suggestions on three important areas for the completion of this project. Issues like location, structure and sustainability are investigated and discussed in detail.P. J. De Andrade SerraT. FatimaA. FernandezT. HulshofT. KhaniyevP. J. P. van MeursJ.-J. OosterwijkS. PostmaV. RottschäferL. SewaltF. Veerman2014-03-15T12:45:10Z2015-05-29T20:16:27Zhttp://miis.maths.ox.ac.uk/miis/id/eprint/647This item is in the repository with the URL: http://miis.maths.ox.ac.uk/miis/id/eprint/6472014-03-15T12:45:10ZSegregation of a Two Species Granular FlowA cellular automaton model is presented for the segregation of a granular flow. The flow consists of particles of two different sizes, which in the specific industrial problem presented by Elkem are lumps of coal. It is known from experiments that these particles show different mobilities under different circumstances. This effect is incorporated in the current model via the inclusion of a 'hydrostatic' pressure term.A.D. FittP. Wilmott2014-03-15T12:39:47Z2015-05-29T20:16:19Zhttp://miis.maths.ox.ac.uk/miis/id/eprint/645This item is in the repository with the URL: http://miis.maths.ox.ac.uk/miis/id/eprint/6452014-03-15T12:39:47ZLong term behaviour of geothermal reservoirsA number of different aspects of geothermal reservoir behaviour were studied during the week. These ranged from the correct formulation of the thermo-elastic deformation equations for granite, and the possible practical methods of implementing the thermo-elastic effects within the existing large computer codes, to the generation of simple models describing the long term thermal effects.

This report describes the results of simple modelling. The approach was to consider first how the rock cooled as a result of water moving through the network of cracks and then to consider second how this cooling might change the rock stresses and water viscosity, and hence the effective permeability of the cracks, thereby altering the flow pattern from inlet to outlet bore-hole.C.P. PleaseH. OckendonS.D. HowisonS. Tighe2014-03-15T12:29:38Z2015-05-29T20:16:10Zhttp://miis.maths.ox.ac.uk/miis/id/eprint/643This item is in the repository with the URL: http://miis.maths.ox.ac.uk/miis/id/eprint/6432014-03-15T12:29:38ZDynamic behaviour of jets and spouts in fluidized bedsThe dynamics of a spouted fluidized bed are investigated. The formation of bubbles due to nipping was also studied.G. DuursmaJ.R. OckendonP. Wilmott2014-03-10T22:26:59Z2015-05-29T20:16:02Zhttp://miis.maths.ox.ac.uk/miis/id/eprint/641This item is in the repository with the URL: http://miis.maths.ox.ac.uk/miis/id/eprint/6412014-03-10T22:26:59ZSpreading of meltsSeveral mathematical problems that related to the flow and solidification of a hot fluid are studied. The fracture of the crust that forms as the fluid solidifies is also examined.A. MovchanJ. MoriartyT. RogersW. A. GreenD. H. Peregrine2013-12-04T23:34:43Z2015-05-29T20:15:29Zhttp://miis.maths.ox.ac.uk/miis/id/eprint/634This item is in the repository with the URL: http://miis.maths.ox.ac.uk/miis/id/eprint/6342013-12-04T23:34:43ZPrediction of sanding in subsurface hydrocarbon reservoirs.Sand production in oil and gas wells can occur if the fluid velocity exceeds a
certain value. Due to drilling operations, the mechanical stresses can exceed the load bearing capacity of the rock. As the local stresses exceed certain level, a certain amount of rock is fractured into sand. Then, the sand is carried by the fluid through the wellbore depending on the flow rate. The amount of the solids can be less than a few grams per cubic meter of reservoir fluid or an essential amount. In the later case erosion of the rock and removing sufficient quantities of rock can occur. This can produce subsurface cavities which collapse and destroy the well.

When sanding is unavoidable it is necessary to estimate the characteristics of the process. Our aim was to generate a simple one-dimensional local model, which predicts the volume of sanding, the radius and the porosity of the yielded zone. Such model will help the company in the development of complex 3D models.H. OckendonS. StoykovT. ZorawikS. DimovaI. GeorgievN. KolkovskaM. TodorovD. Vasileva2013-04-04T12:56:53Z2015-05-29T20:13:43Zhttp://miis.maths.ox.ac.uk/miis/id/eprint/607This item is in the repository with the URL: http://miis.maths.ox.ac.uk/miis/id/eprint/6072013-04-04T12:56:53ZHaptic TouchscreensThe development of haptic touchscreens, that is touchscreens with the ability to mimic the feel of a real keyboard, would be a significant advance in the mobile phone and tablet market. This report investigates one possible route to developing such touchscreens using piezoelectric actuators placed at the edge of the screen and driven at a range of frequencies.

The report addresses the following questions: Can an array of piezoelectric transducers placed round the edge of the screen create localised vibrations in the right physiological range to produce the sensation of a keyboard? If so how many transducers are needed? Where should they be placed? How should they be driven? We consider both the excitation of longitudinal and transverse waves but do not discuss surface waves.M. CookerL. CribbinP. DellarA. FittR. GaburroT. GibbJ. KennedyJ. KingI. KubatV. LapinW. LeeE. MurphyC. NolanJ. ParkerO. PowerC. Timoney