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    Development of a CFD Solver for Primary Diesel Jet Atomization in FOAM-Extend

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    19ICENA-0057.pdf
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    Type
    Conference Paper
    Authors
    Vukcevic, Vuko
    Keser, Robert
    Jasak, Hrvoje
    Battistoni, Michele
    Im, Hong G. cc
    Roenby, Johan
    KAUST Department
    Clean Combustion Research Center
    Computational Reacting Flow Laboratory (CRFL)
    Mechanical Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2019-09-09
    Permanent link to this record
    http://hdl.handle.net/10754/660614
    
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    Abstract
    Ongoing development of a CFD framework for the simulation of primary atomization of a high pressure diesel jet is presented in this work. The numerical model is based on a second order accurate, polyhedral Finite Volume (FV) method implemented in foam-extend-4.1, a community driven fork of the OpenFOAM software. A geometric Volume-of-Fluid (VOF) method isoAdvector is used for interface advection, while the Ghost Fluid Method (GFM) is used to handle the discontinuity of the pressure and the pressure gradient at the interface between the two phases: n-dodecane and air in the combustion chamber. In order to obtain highly resolved interface while minimizing computational time, an Adaptive Grid Refinement (AGR) strategy for arbitrary polyhedral cells is employed in order to refine the parts of the grid near the interface. Dynamic Load Balancing (DLB) is used in order to preserve parallel efficiency during AGR. The combination of isoAdvector-GFM-AGR-DLB presents a unique framework for diesel jet atomization. The developed numerical framework is preliminarily tested on the Engine Combustion Network (ECN) Spray D geometry and conditions. The unstructured, mostly hexahedral grid is used with the base cell size of 40 micrometres. Four refinement levels are used in the close proximity of the interface in order to attempt to resolve break-up of droplets. The finest cells near the interface have the size of 2.5 micrometres. Part of the nozzle is also considered in the simulation in order to capture the developed jet profile at the entry into the combustion chamber. The temporal evolution of the jet is presented, along with the preliminary comparison of droplet statistics with available results.
    Citation
    Vukcevic, V., Keser, R., Jasak, H., Battistoni, M., Im, H., & Roenby, J. (2019). Development of a CFD Solver for Primary Diesel Jet Atomization in FOAM-Extend. SAE Technical Paper Series. doi:10.4271/2019-24-0128
    Sponsors
    This research was sponsored by the King Abdullah University of Science and Technology, Saudi Arabia within the Competitive Research Grant: Predictive Models and Experimental Validation of Multicomponent Dense Spray Dynamics, OSR-2017-CRG6-3409.03, under the administration of Prof. Hong Im, and by the Croatian Science Foundation under the project number DOK-01-2018.
    Publisher
    SAE International
    Conference/Event name
    SAE 14th International Conference on Engines and Vehicles, ICE 2019
    DOI
    10.4271/2019-24-0128
    Additional Links
    https://www.sae.org/content/2019-24-0128/
    ae974a485f413a2113503eed53cd6c53
    10.4271/2019-24-0128
    Scopus Count
    Collections
    Conference Papers; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

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