Sazhin, S.; Shishkova, I. (2017). Kinetic and MD modelling of automotive fuel droplets heating and evaporation: recent results. En Ilass Europe. 28th european conference on Liquid Atomization and Spray Systems. Editorial Universitat Politècnica de València. 1076-7082. https://doi.org/10.4995/ILASS2017.2017.4593
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/99924
Title:
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Kinetic and MD modelling of automotive fuel droplets heating and evaporation: recent results
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Author:
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Sazhin, Sergei
Shishkova, Irina
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Issued date:
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Abstract:
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[EN] Recent results of the investigation of kinetic and molecular dynamics (MD) models for automotive fuel droplet heating
and evaporation are summarised. The kinetic model is based on the consideration of the kinetic ...[+]
[EN] Recent results of the investigation of kinetic and molecular dynamics (MD) models for automotive fuel droplet heating
and evaporation are summarised. The kinetic model is based on the consideration of the kinetic region in the close
vicinity of the surface of the heated and evaporating droplets, where the motion of molecules is described in terms
of the Boltzmann equations for vapour components and air, and the hydrodynamic region away from this surface.
The effects of finite thermal conductivity and species diffusivity inside the droplets and inelastic collisions in the
kinetic region are taken into account. A new self-consistent kinetic model for heating and evaporation of Diesel
fuel droplets is briefly described. The values of temperature and vapour densities at the outer boundary of the
kinetic region are inferred from the requirement that both heat flux and mass flux of vapour components in the
kinetic and hydrodynamic regions in the vicinity of the interface between these regions are equal. At first, the
heat and mass fluxes in the hydrodynamic region are calculated based on the values of temperature and vapour
density at the surface of the droplet. Then the values of temperature and vapour density at the outer boundary of
the kinetic region, obtained following this procedure, are used to calculate the corrected values of hydrodynamic
heat and species mass fluxes. The latter in their turn lead to new corrected values of temperature and vapour
density at the outer boundary of the kinetic region. It is shown that this process quickly converges and leads to
self-consistent values for both heat and mass fluxes. Boundary conditions at the surface of the droplet for kinetic
calculations are inferred from the MD calculations. These calculations are based on the observation that methyl
(CH3) or methylene (CH2) groups in n-dodecane (approximation of Diesel fuel) molecules can be regarded as
separate atom-like structures in a relatively simple United Atom Model. Some results of the application of quantum
chemical methods to the estimation of the evaporation/condensation coefficient are discussed.
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Subjects:
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Diesel fuel
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Droplets
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Heating
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Evaporation
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Kinetic modelling
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Copyrigths:
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Reconocimiento - No comercial - Sin obra derivada (by-nc-nd)
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ISBN:
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9788490485804
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Source:
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Ilass Europe. 28th european conference on Liquid Atomization and Spray Systems.
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DOI:
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10.4995/ILASS2017.2017.4593
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Publisher:
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Editorial Universitat Politècnica de València
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Publisher version:
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http://ocs.editorial.upv.es/index.php/ILASS/ILASS2017/paper/view/4593
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Conference name:
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ILASS2017 - 28th European Conference on Liquid Atomization and Spray Systems
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Conference place:
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Valencia, Spain
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Conference date:
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September 06-08,2017
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Project ID:
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info:eu-repo/grantAgreement/UKRI//EP%2FK005758%2F1/GB/Development of the full Lagrangian approach for the analysis of vortex ring-like structures in disperse media: application to gasoline engines/
info:eu-repo/grantAgreement/UKRI//EP%2FM002608%2F1/GB/Investigation of vortex ring-like structures in internal combustion engines, taking into account thermal and confinement effects/
info:eu-repo/grantAgreement/UKRI//EP%2FK020528%2F1/GB/Investigation of Non-Spherical Droplets in High-Pressure Fuel Sprays/
info:eu-repo/grantAgreement/Royal Society//IE 160014/
info:eu-repo/grantAgreement/RFBR//17-08-01274/
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Thanks:
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The authors are grateful to the EPSRC (UK) (grants EP/K005758/1, EP/K020528/1 and EP/M002608/1), the Royal Society (UK) (grant IE 160014) and the Russian Foundation for Basic Research (grant No. 17-08-01274) for their ...[+]
The authors are grateful to the EPSRC (UK) (grants EP/K005758/1, EP/K020528/1 and EP/M002608/1), the Royal Society (UK) (grant IE 160014) and the Russian Foundation for Basic Research (grant No. 17-08-01274) for their financial support.
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Type:
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Capítulo de libro
Comunicación en congreso
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