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A New VSC-HVDC Model for Power Flows Using the Newton-Raphson Method (2013)
Journal Article
Acha, E., Kazemtabrizi, B., & Castro, L. (2013). A New VSC-HVDC Model for Power Flows Using the Newton-Raphson Method. IEEE Transactions on Power Systems, 28(3), 2602-2612. https://doi.org/10.1109/tpwrs.2012.2236109

The paper presents a new model of the VSC-HVDC aimed at power flow solutions using the Newton-Raphson method. Each converter station is made up of the series connection of a voltage source converter (VSC) and its connecting transformer which is assum... Read More about A New VSC-HVDC Model for Power Flows Using the Newton-Raphson Method.

A partition of unity FEM for time-dependent diffusion problems using multiple enrichment functions (2013)
Journal Article
Mohamed, M., Seaid, M., Trevelyan, J., & Laghrouche, O. (2013). A partition of unity FEM for time-dependent diffusion problems using multiple enrichment functions. International Journal for Numerical Methods in Engineering, 93(3), 245-265. https://doi.org/10.1002/nme.4383

An enriched partition of unity FEM is developed to solve time-dependent diffusion problems. In the present formulation, multiple exponential functions describing the spatial and temporal diffusion decay are embedded in the finite element approximatio... Read More about A partition of unity FEM for time-dependent diffusion problems using multiple enrichment functions.

Photo-assisted molecular engineering in solution-processed organic thin-film transistors with a blended semiconductor for high mobility anisotropy (2013)
Journal Article
Park, J., Keum, C., Kim, J., Lee, S., Payne, M., Petty, M., …Bae, J. (2013). Photo-assisted molecular engineering in solution-processed organic thin-film transistors with a blended semiconductor for high mobility anisotropy. Applied Physics Letters, 102(1), Article 013306. https://doi.org/10.1063/1.4774001

This paper reports a viable method for enhancing mobility anisotropy in solution-processed organic thin-film transistors (TFTs) by irradiating linearly polarized ultraviolet (LPUV) light onto a 6,13-bis(triisopropylsilylethynyl)-pentacene (TIPS-penta... Read More about Photo-assisted molecular engineering in solution-processed organic thin-film transistors with a blended semiconductor for high mobility anisotropy.

Unsteady Surface Pressures and Airload of a Pitching Airfoil (2013)
Journal Article
Worasinchai, S., Ingram, G., & Dominy, R. (2013). Unsteady Surface Pressures and Airload of a Pitching Airfoil. Energy Procedia, 34, 407-416. https://doi.org/10.1016/j.egypro.2013.06.769

This paper presents unsteady surface pressure variations of a symmetrical NACA0012 section commonly used on Vertical-axis wind turbine blades. The section was tested at a Reynolds number of 90,000, mean incidence angles of 15 and -15, and a reduced f... Read More about Unsteady Surface Pressures and Airload of a Pitching Airfoil.

A finite volume method for scalar conservation laws with stochastic time-space dependent flux function (2013)
Journal Article
Mohamed, K., Seaid, M., & Zahri, M. (2013). A finite volume method for scalar conservation laws with stochastic time-space dependent flux function. Journal of Computational and Applied Mathematics, 237(1), 614-632. https://doi.org/10.1016/j.cam.2012.07.014

We propose a new finite volume method for scalar conservation laws with stochastic time–space dependent flux functions. The stochastic effects appear in the flux function and can be interpreted as a random manner to localize the discontinuity in the... Read More about A finite volume method for scalar conservation laws with stochastic time-space dependent flux function.

On the importance of relative permeability data for estimating CO2 injectivity in brine aquifers (2013)
Journal Article
Mathias, S., Gluyas, J., González Martínez de Miguel, G., Bryant, S., & Wilson, D. (2013). On the importance of relative permeability data for estimating CO2 injectivity in brine aquifers. International Journal of Greenhouse Gas Control, 12, 200-212. https://doi.org/10.1016/j.ijggc.2012.09.017

Performance assessment of possible CO2 storage schemes is often investigated through numerical simulation of the CO2 injection process. An important criterion of interest is the maximum sustainable injection rate. Relevant numerical models generally... Read More about On the importance of relative permeability data for estimating CO2 injectivity in brine aquifers.

A New STATCOM Model for Power Flows Using the Newton–Raphson Method (2013)
Journal Article
Acha, E., & Kazemtabrizi, B. (2013). A New STATCOM Model for Power Flows Using the Newton–Raphson Method. IEEE Transactions on Power Systems, 28(3), 2455-2465. https://doi.org/10.1109/tpwrs.2012.2237186

The paper presents a new model of the STATCOM aimed at power flow solutions using the Newton-Raphson method. The STATCOM is made up of the series connection of a voltage-source converter (VSC) and its connecting transformer. The VSC is represented in... Read More about A New STATCOM Model for Power Flows Using the Newton–Raphson Method.

A unique Critical State two-surface hyperplasticity model for fine-grained particulate media (2013)
Journal Article
Coombs, W., Crouch, R., & Augarde, C. (2013). A unique Critical State two-surface hyperplasticity model for fine-grained particulate media. Journal of the Mechanics and Physics of Solids, 61(1), 175-189. https://doi.org/10.1016/j.jmps.2012.08.002

Even mild compression can cause re-arrangement of the internal structure of clay-like geomaterials, whereby clusters of particles rotate and collapse as face-to-face contacts between the constituent mineral platelets increase at the expense of edge-t... Read More about A unique Critical State two-surface hyperplasticity model for fine-grained particulate media.

Micromachined Devices for Use in Terahertz Applications (2013)
Journal Article
Wood, D., Chamberlain, M., Baragwanath, A., Dodd, L., Hill, C., & Gallant, A. (2013). Micromachined Devices for Use in Terahertz Applications. Advances in Science and Technology, 81, 20-27. https://doi.org/10.4028/www.scientific.net/ast.81.20

Here we present results from key aspects of our interest in using micromachined devices in the THz region. First, our early work on making filters from rods of gold-coated SU8 is described. Pass (up to 97%) and stop bands can be observed which are th... Read More about Micromachined Devices for Use in Terahertz Applications.

Real-time monitoring of wind turbine generator shaft alignment using laser measurement (2013)
Presentation / Conference Contribution
Mankowski, O., & Wang, Q. (2013, December). Real-time monitoring of wind turbine generator shaft alignment using laser measurement. Presented at 2nd International Through-life Engineering Service Conference, Cranfield University

Shaft Misalignment is one of the most common sources of trouble of wind turbine drive train when rigid couplings connect the shafts. Ideal alignment of the shaft is difficult to be obtained and the couplings attached to the shaft may present angular... Read More about Real-time monitoring of wind turbine generator shaft alignment using laser measurement.