PySDM swMATH ID: 37975 Software Authors: Piotr Bartman, Sylwester Arabas, Kamil Górski, Anna Jaruga, Grzegorz Łazarski, Michael Olesik, Bartosz Piasecki, Aleksandra Talar Description: PySDM v1: particle-based cloud modelling package for warm-rain microphysics and aqueous chemistry. PySDM is an open-source Python package for simulating the dynamics of particles undergoing condensational and collisional growth, interacting with a fluid flow and subject to chemical composition changes. It is intended to serve as a building block for process-level as well as computational-fluid-dynamics simulation systems involving representation of a continuous phase (air) and a dispersed phase (aerosol), with PySDM being responsible for representation of the dispersed phase. The PySDM package core is a Pythonic high-performance implementation of the Super-Droplet Method (SDM) Monte-Carlo algorithm for representing collisional growth, hence the name. PySDM has two alternative parallel number-crunching backends available: multi-threaded CPU backend based on Numba and GPU-resident backend built on top of ThrustRTC. The usage examples are built on top of four simple atmospheric cloud modelling frameworks: box, adiabatic parcel, single-column and 2D prescribed flow kinematic models. In addition, the package ships with tutorial code depicting how PySDM can be used from Julia and Matlab. Homepage: https://arxiv.org/abs/2103.17238 Dependencies: Python Keywords: Atmospheric; Oceanic Physics; arXiv_physics.ao-ph; arXiv_cs.MS; arXiv_physics.comp-ph; warm-rain microphysics; aqueous chemistry; cloud modelling; Python Related Software: ThrustRTC; PALM; Numba; PyMPDATA; Pencil Code; LCM1D; libcloudph++; superdroplet; pyrcel; PyBOX; Julia; Matlab; Python Cited in: 0 Publications Standard Articles 1 Publication describing the Software Year PySDM v1: particle-based cloud modelling package for warm-rain microphysics and aqueous chemistry Piotr Bartman, Sylwester Arabas, Kamil Górski, Anna Jaruga, Grzegorz Łazarski, Michael Olesik, Bartosz Piasecki, Aleksandra Talar 2021