Abstract
Turbulence is a complex, multi-scale fluid process that can be strongly modified by the presence of multiple phases. In this work, we will discuss various aspects of the interaction between turbulence and interfaces with surface tension, as commonly encountered in liquid-gas flows. This study is based on a series of direct numerical simulations of homogeneous and isotropic turbulence in the presence of an initially flat interface that separates two fluids of equal densities and viscosities. This highly simplified flow configuration is selected as it isolates a critical aspect of turbulent liquid-gas flows and allows for deeper analysis. A second order numerical discretization that conserves mass, momentum, and kinetic energy is employed for all simulations. The scales of interface corrugation are presented, identifying the presence of a critical cutoff length scale below which surface tension suppresses interface deformation.
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Chiodi, R., McCaslin, J., Desjardins, O. (2019). Interactions Between Turbulence and Interfaces with Surface Tension. In: Gorokhovski, M., Godeferd, F. (eds) Turbulent Cascades II. ERCOFTAC Series, vol 26. Springer, Cham. https://doi.org/10.1007/978-3-030-12547-9_26
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DOI: https://doi.org/10.1007/978-3-030-12547-9_26
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