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arXiv · 2209.13142

Breakup dynamics in primary jet atomization using mesh- and interface- refined Cahn-Hilliard Navier-Stokes

Makrand A. Khanwale·Kumar Saurabh·Masado Ishii·Hari Sundar·Baskar Ganapathysubramanian
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Abstract

We present a technique to perform interface-resolved simulations of complex breakup dynamics in two-phase flows using the Cahn-Hilliard Navier-Stokes equations. The method dynamically decreases the interface thickness parameter in relevant regions and simultaneously increases local mesh resolution, preventing numerical artifacts. We perform a detailed numerical simulation of pulsed jet atomization that shows a complex cascade of break-up mechanisms involving sheet rupture and filament formation. To understand the effect of refinement on the breakup, we analyze the droplet size distribution. The proposed approach opens up resolved simulations for various multiphase flow phenomena.

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Makrand A. Khanwale, Kumar Saurabh, Masado Ishii, Hari Sundar, Baskar Ganapathysubramanian. 2022-09-27. Breakup dynamics in primary jet atomization using mesh- and interface- refined Cahn-Hilliard Navier-Stokes. https://arxiv.org/abs/2209.13142

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