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Emulator of PR-DNS: Part II, Accelerating thermodynamics and cloud droplet fields with machine learning in Particle-Resolved Direct Numerical Simulation
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  • Tao Zhang,
  • Lingda Li,
  • Yangang Liu,
  • Vanessa L ́opez-Marrero,
  • Fan Yang,
  • Mohammad Atif,
  • Foluso Ladeinde,
  • Abdullah Al Muti Sharfuddin,
  • Meifeng Lin
Tao Zhang
Brookhaven National Laboratory

Corresponding Author:[email protected]

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Lingda Li
Brookhaven National Laboratory
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Yangang Liu
Brookhaven National Laboratory (DOE)
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Vanessa L ́opez-Marrero
Brookhaven National Laboratory
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Fan Yang
Brookhaven National Laboratory (DOE)
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Mohammad Atif
Brookhaven National Laboratory
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Foluso Ladeinde
Stony Brook University
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Abdullah Al Muti Sharfuddin
Stony Brook University
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Meifeng Lin
Brookhaven National Laboratory
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Abstract

Particle-resolved direct numerical simulations (PR-DNS) are crucial for unraveling the intricate interplay of aerosol-cloud-turbulence processes. However, such models are challenged by the huge computational cost due to the extremely high resolution. Our prior work showcased that leveraging machine learning emulators could slash computational expenses by two orders of magnitude while maintaining remarkable precision for dynamic fields, and exhibited generalizability across diverse initial conditions and at super-resolution scales without retraining the emulators. Building upon this foundation, this work extends the emulator’s application to thermodynamic in the two spatial dimensions and droplet fields in the three spatial dimensions. Furthermore, to enhance the robust generalizability of the emulator for different initial values and super resolution, we introduce a novel multi-initial learning approach for the neural operator method. For the droplet fields, we introduce a novel loss function tailored to assess distribution differences using the Mallows distance, focusing particularly on droplet size distributions. Our findings indicate that the machine learning emulators hold promising potential to effectively mimic numerical PR-DNS simulations, thereby significantly advancing our understanding of the complex interactions within aerosol-cloud-turbulence processes.
08 Oct 2024Submitted to ESS Open Archive
10 Oct 2024Published in ESS Open Archive