This study focuses on Lagrangian spray models that are commonly used in engine CFD simulations. In modeling sprays, droplet collision is one of the physical phenomena that must be accounted for. There are two main parts of droplet collision models for sprays - detecting colliding pairs of droplets and predicting the outcomes of these collisions. For the first part, we focus on the efficiency of the algorithm. We present an implementation of the arbitrary adaptive collision mesh model of Hou and Schmidt [1], and examine its efficiency in dealing with large simulations. Through theoretical analysis and numerical tests, we show that the computational cost of this model scales pseudo-linearly with respect to the number of parcels in the sprays. Regarding the second part, we examine the variations in existing phenomenological models used for predicting binary droplet collision outcomes. A quantitative accuracy metric is used to evaluate the models with respect to the experimental data set. To provide a holistic perspective, three different experimental datasets that contain over 2000 data points are collated, and used in the evaluation. These analyses show that the accuracy of the collision outcome prediction is between 65% to 70%, which indicates a need for future improvement.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    The Computational Cost and Accuracy of Spray Droplet Collision Models


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Agarwal, Arpit (Autor:in) / Naik, Chitralkumar (Autor:in) / Meeks, Ellen (Autor:in) / Liang, Long (Autor:in) / Wang, Yue (Autor:in)

    Kongress:

    WCX SAE World Congress Experience ; 2019



    Erscheinungsdatum :

    2019-04-02




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch






    Comparison of droplet combustion models in spray combustion

    JIANG, TSUNG / HSU, WING-JER | AIAA | 1991


    An Experimental and Computational Study of Bouncing and Deformation in Droplet Collision

    Qian, J. / Tryggvason, G. / Law, C. K. et al. | British Library Conference Proceedings | 1997