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Details of Grant 

EPSRC Reference: GR/R25521/01
Title: Direct Numerical Simulation of Droplet-Gas Systems For Power Generation Applications
Principal Investigator: Bowen, Professor P
Other Investigators:
Researcher Co-Investigators:
Project Partners:
BP Ricardo Group
Department: Sch of Engineering
Organisation: Cardiff University
Scheme: Standard Research (Pre-FEC)
Starts: 31 December 2001 Ends: 27 February 2005 Value (£): 70,320
EPSRC Research Topic Classifications:
Combustion Continuum Mechanics
Multiphase Flow Numerical Analysis
EPSRC Industrial Sector Classifications:
Transport Systems and Vehicles Manufacturing
Energy
Related Grants:
GR/R25682/02
Panel History:  
Summary on Grant Application Form
High-order numerical techniques will be developed for solving problems of industrial relevance in the power generation industry, such as droplet-gas interactions including heat/mass transfer. As the Weber number increase beyond unity, the droplet begins to deviate from a sherical shape and eventually experiences break-up (typically for We>12). Traditional numerical techniques require very fine computational meshes in order to model these phenomena and provide quantitative information on these interactions. High-order methods, such as the spectral element method, provide a high degree of accuracy. Furthermore, the accuracy does not deteriorate adversely when the droplet is defomed. The discretization is performed using a second-order backward difference scheme in time and a spectral element discretization in space. Zonal domain decomposition is used to minimize the amount of remeshing required at each time step. The accuracy of the proposed approach will be validated for the problems of flow over a sphere and an oscillating drop before simulating a sequence of problems in which the mathematical complexity is increasingly refined to include variable-density, temperature and non-Newtonian droplets. These problems have direct relevance to secondary breakup in engine fuel sprays, problems in utilisation of bio-oil, secondary breakup of water sprays for gaseous explosion mitigation, amongst others. Moreover, the development will allow an insight into the potential advantages of these higher order methods for DNS of generalised problems such as flame propagation through flames and turbulent combustion.
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Organisation Website: http://www.cf.ac.uk