A numerical study of the transient deformation and drag properties of impulsively started decelerating drops in axisymmetric flows is conducted. The incompressible Navier–Stokes equations coupled with the volume of fraction method are solved. The differences in the deformation and drag characteristics between the accelerating and decelerating drops are elucidated. The Weber number W e has a significant influence on the drag properties of the round drops; however, the effect of the Ohnesorge number O h is small. A dynamic droplet drag model is provided based on the computational fluid dynamics results to predict the drag coefficient of a decelerating drop. In addition, the flow of liquid drops past an RAE2822 airfoil is considered, and its drag is evaluated using the drag model.


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    Title :

    Numerical Study of Transient Deformation and Drag Characteristics of a Decelerating Droplet


    Contributors:

    Published in:

    AIAA Journal ; 54 , 2 ; 490-505


    Publication date :

    2016-02-01




    Type of media :

    Conference paper , Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English