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Injection behaviour of fractured reservoirs at near wellbore and far field areas: a CFD study. (2014)
Journal Article
OLUYEMI, G.F., KANIN, L. and NAIR, A. 2014. Injection behaviour of fractured reservoirs at near wellbore and far field areas: a CFD study. International journal of fluid mechanics research [online], 41(6), pages 536-546. Available from: https://doi.org/10.1615/InterJFluidMechRes.v41.i6.60

Flow partitioning in fractured reservoirs especially during injection and production operations poses a great challenge to the optimisation of these important field operations. For example, flow partitioning into the fracture from the matrix may limi... Read More about Injection behaviour of fractured reservoirs at near wellbore and far field areas: a CFD study..

Innovative cyclical development of the Russian pipeline system. (2014)
Conference Proceeding
KURUSHINA, V. and ZEMENKOV, Y. 2014. Innovative cyclical development of the Russian pipeline system. In Brebbia, C.A., Magaril, E.R. and Khodorovsky, M.Y. (eds.) Energy production and management in the 21st century: the quest for sustainable energy: proceedings of the 1st International conference on energy production and management (Energy Quest 2014), 23-25 April 2014, Ekaterinburg, Russia. WIT transactions on ecology and the environment, 190. Southampton: WIT Press [online], pages 881-888. Available from: https://doi.org/10.2495/EQ140822

This paper examines the identification of patterns of innovative development in the Russian pipeline system. An evaluation system based on the theory of technological innovation cycles is proposed. The innovation cycles identification scheme, in term... Read More about Innovative cyclical development of the Russian pipeline system..

Structure, strength and defect characterisation of cement based materials. (2014)
Thesis
CHOUDHURY, A.H. 2014. Structure, strength and defect characterisation of cement based materials. Robert Gordon University, PhD thesis.

In cement based systems, the residual stresses are created by internal expansion. This provides toughening by the release of the residual stresses as the macro-crack propagates. While circumstantial evidence of the residual stresses exist (e.g. micro... Read More about Structure, strength and defect characterisation of cement based materials..

FEM analysis to optimally design end mill cutters for milling of Ti-6Al-4V. (2014)
Journal Article
KUMAR, V., EAKAMBARAM, A. and ARIVAZHAGAN, A. 2014. FEM analysis to optimally design end mill cutters for milling of Ti-6Al-4 V. Procedia engineering [online], 97: proceedings of 12th Global congress on manufacturing and management 2014 (GCMM 2014), 8-10 December 2014, Vellore, India, pages 1237-1246. Available from: https://doi.org/10.1016/j.proeng.2014.12.402

This paper presents an FEM analysis conducted for optimally designing end mill cutters through verifying the cutting tool forces and stresses for milling Titanium alloy Ti-6Al-4 V. Initially, the theoretical tool forces are calculated by considering... Read More about FEM analysis to optimally design end mill cutters for milling of Ti-6Al-4V..

Twinning anisotropy of tantalum during nanoindentation. (2014)
Journal Article
GOEL, S., BEAKE, B., CHAN, C.-W., FAISAL, N.H. and DUNNE, N. 2015. Twinning anisotropy of tantalum during nanoindentation. Materials science and engineering: A [online], 627, pages 249-261. Available from: https://doi.org/10.1016/j.msea.2014.12.075

Unlike other BCC metals, the plastic deformation of nanocrystalline Tantalum (Ta) during compression is regulated by deformation twinning. Whether or not this twinning exhibits anisotropy was investigated through simulation of displacement-controlled... Read More about Twinning anisotropy of tantalum during nanoindentation..

Natural convection flow and heat transfer in an enclosure containing staggered arrangement of blockages. (2014)
Journal Article
IYI, D. and HASAN, R. 2015. Natural convection flow and heat transfer in an enclosure containging staggered arragement of blockages. Procedia engineering [online], 105: proceedings of the 6th BSME international conference on thermal engineering (ICTE 2014), 19-21 December 2014, Dhaka, Bangladesh, pages 176-183. Available from: https://doi.org/10.1016/j.proeng.2015.05.033

The work reported in this paper is a numerical study of airflow and heat transfer for low turbulence buoyancy-driven flow in a rectangular cavity partially filled with solid objects. The two vertical walls were maintained at constant temperatures giv... Read More about Natural convection flow and heat transfer in an enclosure containing staggered arrangement of blockages..

Enhanced oil recovery by CO2 injection in carbonate reservoirs. (2014)
Conference Proceeding
HAWEZ, H. and AHMED, Z. 2014. Enhanced oil recovery by CO2 injection in carbonate reservoirs. In Al-Kayiem, H.H., Brebbia, C.A. and Zubir, S.S. (eds.) Energy and sustainability V: proceedings of 5th Energy and sustainability international conference 2014, 16-18 December 2014, Kuala Lumpur, Malaysia. WIT transactions on ecology and the environment, 186. Southampton: WIT Press [online], 547-558. Available from: https://doi.org/10.2495/ESUS140481

The majority of carbonate reservoirs have low porosity and permeability in general because of having a high amount of matrixes that make a heterogeneous reservoir, however high permeable layers are fractured. This study shows the effect of carbon dio... Read More about Enhanced oil recovery by CO2 injection in carbonate reservoirs..

Signal conditioning electronics for UHF partial discharge detection and location system. (2014)
Presentation / Conference
UPTON, D.W., MATHER, P.J., ZHANG, Y., JABER, A., AHMED, H., KHAN, U., SAEED, B., VIEIRA, M.F.Q., ATKINSON, R. and GLOVER, I.A. 2014. Signal conditioning electronics for UHF partial discharge detection and location system. Presented at the 2014 International Union of Radio Science (URSI) Festival of radio science, 16 December 2014, Manchester, UK.

Partial Discharge (PD) occurs in damaged high-voltage insulation. PD results in UHF electromagnetic radiation which can be used to detect and locate insulation faults in HV power systems equipment such as transmission lines and transformers thereby p... Read More about Signal conditioning electronics for UHF partial discharge detection and location system..

Renewable energy potentials in Cameroon: prospects and challenges. (2014)
Journal Article
WIRBA, A.V., MAS'UD, A.A., MUHAMMAD-SUKKI, F., AHMAD, S., TAHAR, R.M., RAHIM, R.A., MUNIR, A.B. and KARIM, M.E. 2015. Renewable energy potentials in Cameroon: prospects and challenges. Renewable energy [online], 76, pages 560-565. Available from: https://doi.org/10.1016/j.renene.2014.11.083

This paper aims at discussing the renewable energy potentials in delivering parts of the energy needs in Cameroon. The country has an enormous renewable energy potential. The lack of clear renewable energy policy in the mix is an issue that needs to... Read More about Renewable energy potentials in Cameroon: prospects and challenges..

Effect of emissivity on the heat and mass transfer of humid air in a cavity filled with solid obstacles. (2014)
Journal Article
IYI, D., HASAN, R. and PENLINGTON, R. 2015. Effect of emissivity on the heat and mass transfer of humid air in a cavity filled with solid obstacles. Numerical heat transfer, part A: applications [online], 67(5), pages 531-546. Available from: https://doi.org/10.1080/10407782.2014.937261

The work reported here is a 2D numerical study on the buoyancy-driven low-speed turbulent flow of humid air inside a rectangular cavity partially filled with solid cylindrical objects for a Rayleigh number of 1.45 × 109. Variations of Nusselt number,... Read More about Effect of emissivity on the heat and mass transfer of humid air in a cavity filled with solid obstacles..

Evolution of economic development aims: assessment of the smart growth. (2014)
Journal Article
KURUSHINA, E.V. and KURUSHINA, V.A. 2014. Evolution of economic development aims: assessment of the smart growth. Life science journal [online], 11(11), pages 517-521. Available from: https://doi.org/10.7537/marslsj111114.88

The paper investigated the global trends of changing aims for evaluating economic development. Approaches to assessing the level of innovation are systematized. Classifications of innovations are given. The approach to the assessment of smart growth... Read More about Evolution of economic development aims: assessment of the smart growth..

Dynamics of rising CO2 bubble plumes in the QICS field experiment: part 2; modelling. (2014)
Journal Article
DEWAR, M., SELLAMI, N. and CHEN, B. 2015. Dynamics of rising CO2 bubble plumes in the QICS field experiment: part 2; modelling. International journal of greenhouse gas control [online], 38, pages 52-63. Available from: https://doi.org/10.1016/j.ijggc.2014.11.003

An oceanic two-phase plume model is developed to include bubble size distribution and bubble interactions, applied to the prediction of CO2 bubble plume and CO2 solution dynamics observed from the recent QICS field experiment in the Scottish sea at A... Read More about Dynamics of rising CO2 bubble plumes in the QICS field experiment: part 2; modelling..

Synthesis of gas transport through nano composite ceramic membrane for esterification and volatile organic compound separations. (2014)
Journal Article
OKON, E., SHEHU, H. and GOBINA, E. 2014. Synthesis of gas transport through nano composite ceramic membrane for esterification and volatile organic compound separations. Journal of mechanics engineering and automation [online], 4(11), pages 905-913. Available from: https://doi.org/10.17265/2161-623X/2014.11.007

The transport behaviour of carrier gases with inorganic catalytic ceramic membrane used for ethyl lactate production and VOC (volatile organic compound) recovery in the gauge pressure range of 0.10-1.00 bar and temperature range of 333 K was investig... Read More about Synthesis of gas transport through nano composite ceramic membrane for esterification and volatile organic compound separations..

Sliding wear investigation of suspension sprayed WC-Co nanocomposite coatings. (2014)
Journal Article
AHMED, R., ALI, O., FAISAL, N.H., AL-ANAZI, N.M., AL-MUTAIRI, S., TOMA, F.-L., BERGER, L.-M., POTTHOFF, A. and GOOSEN, M.F.A. 2015. Sliding wear investigation of suspension sprayed WC-Co nanocomposite coatings. Wear [online], 322-323, pages 133-150. Available from: https://doi.org/10.1016/j.wear.2014.10.021

Sliding wear evaluation of nanostructured coatings deposited by Suspension High Velocity Oxy-Fuel (S-HVOF) and conventional HVOF (Jet Kote (HVOF-JK) and JP5000 (HVOF-JP)) spraying were evaluated. S-HVOF coatings were nanostructured and deposited via... Read More about Sliding wear investigation of suspension sprayed WC-Co nanocomposite coatings..

A progressive study into offshore wind farm maintenance optimisation using risk based failure analysis. (2014)
Journal Article
SINHA, Y. and STEEL, J.A. 2015. A progressive study into offshore wind farm maintenance optimisation using risk based failure analysis. Renewable and sustainable energy reviews [online], 42, pages 735-742. Available from: https://doi.org/10.1016/j.rser.2014.10.087

Offshore Wind Farm consists of an array of Wind Turbines electrical, communication, command and control systems. At present the cost of maintaining Wind Turbines in the offshore locations is very high (about 35% of lifetime costs). This work puts emp... Read More about A progressive study into offshore wind farm maintenance optimisation using risk based failure analysis..

Structure property relationship of suspension thermally sprayed WC-Co nanocomposite coatings. (2014)
Journal Article
AHMED, R., FAISAL, N.H., AL-ANAZI, N.M., AL-MUTAIRI, S., TOMA, F.-L., BERGER, L.-M., POTTHOFF, A., POLYCHRONIADIS, E.K., SALL, M., CHALIAMPALIAS, D. and GOOSEN, M.F.A. 2015. Structure property relationship of suspension thermally sprayed WC-Co nanocomposite coatings. Journal of thermal spray technology [online], 24(3), pages 357-377. Available from: https://doi.org/10.1007/s11666-014-0174-2

Tribomechanical properties of nanostructured coatings deposited by suspension high velocity oxy-fuel (S-HVOF) and conventional HVOF (Jet Kote) spraying were evaluated. Nanostructured S-HVOF coatings were obtained via ball milling of the agglomerated... Read More about Structure property relationship of suspension thermally sprayed WC-Co nanocomposite coatings..

Modified half-bridge modular multilevel converter for HVDC systems with DC fault ride-through capability. (2014)
Conference Proceeding
AHMED, K.H. and ABOUSHADY, A.A. 2014. Modified half-bridge modular multilevel converter for HVDC systems with DC fault ride-through capability. In Proceedings of the 40th IEEE Industrial Electronics Society annual conference (IECON 2014), 30 October - 01 November 2014, Dallas, USA. Piscataway: IEEE [online], pages 4676-4682. Available from: https://doi.org/10.1109/IECON.2014.7049207

One of the main challenges of voltage source converter based HVDC systems is DC faults. In this paper, two different modified half-bridge modular multilevel converter topologies are proposed. The proposed converters offer a fault tolerant against the... Read More about Modified half-bridge modular multilevel converter for HVDC systems with DC fault ride-through capability..

Hydrogen separation using silica-based composite membranes. (2014)
Journal Article
KAJAMA, M.N., NWOGU, N.C. and GOBINA, E. 2014. Hydrogen separation using silica-based composite membranes. Advanced materials research [online], 1051: selected papers from the 2014 international conference on green materials and environmental engineering (GMEE 2014), 21-22 September 2014, Hong Kong, China, pages 107-111. Available from: https://doi.org/10.4028/www.scientific.net/AMR.1051.107

Silica sol-gel membranes have been developed for moderate temperature (300°C) separation of hydrogen (H2) from nitrogen (N2), methane (CH4) and argon (Ar) gas molecules. Tubular ceramic support with 15 nm nominal pore diameter and 45% porosity was mo... Read More about Hydrogen separation using silica-based composite membranes..

Indigenous capability building as an intervention strategy for sustainable enerby implementation in vulnerable societies. (2014)
Thesis
GARNIATI, L. 2014. Indigenous capability building as an intervention strategy for sustainable enerby implementation in vulnerable societies. Robert Gordon University, PhD thesis.

Geospatial regions have different requirements for energy development due to variations in environmental, economic, social, and political constraints which influence their energy demand profiles and generation capacities. These constraints determine... Read More about Indigenous capability building as an intervention strategy for sustainable enerby implementation in vulnerable societies..

Forward and backward motion control of a vibro-impact capsule system. (2014)
Journal Article
LIU, Y., PAVLOVSKAIA, E., WIERCIGROCH, M. and PENG, Z. 2015. Forward and backward motion control of a vibro-impact capsule system. International journal of non-linear mechanics [online], 70, pages 30-46. Available from: https://doi.org/10.1016/j.ijnonlinmec.2014.10.009

A capsule system driven by a harmonic force applied to its inner mass is considered in this study. Four various friction models are employed to describe motion of the capsule in different environments taking into account Coulomb friction, viscous dam... Read More about Forward and backward motion control of a vibro-impact capsule system..