TriPoDPy simulates the evolution of gas and dust in protoplanetary disks using a parametric dust-evolution model. It models the radial evolution of disk material, including viscous evolution of the gas and the advection, diffusion, and growth of dust particles. It implements the TriPoD dust model to represent dust size distributions and track their evolution across the disk. The code uses Simframe (ascl:2603.018) for running simulations, and its Simulation class inherits attributes from DustPy (ascl:2207.016). TriPoDPy can be used to explore the structure and dynamics of protoplanetary disks and the processes that influence dust growth and transport during planet formation.

Simframe facilitates setting up and running scientific simulations. The package organizes simulation data into fields derived from NumPy arrays, allowing users to define variables, parameters, and differential equations within a unified simulation frame. It includes numerical integration schemes—both explicit and implicit—to evolve model variables and supports adaptive step sizes and custom integration methods. simframe also provides tools for structuring simulation components, updating variables during integration, and writing or reading output data files. Example applications include solving coupled differential equations and modeling dynamical systems such as N-body problems or compartmental models.

The DustPyLib library contains auxiliary modules for the dust evolution software DustPy (ascl:2207.016), which simulates the evolution of dust and gas in protoplanetary disks. DustPyLib includes interfaces to radiative transfer codes and modules with extensions to the DustPy defaults.

DustPy simulates the radial evolution of gas and dust in protoplanetary disks, involving viscous evolution of the gas disk and advection and diffusion of the dust disk, as well as dust growth by solving the Smoluchowski equation. The package provides a standard simulation and the ability to plot results, and also allows modification of the initial conditions for dust, gas, the grid, and the central star.