shamrock.model_ramses.InstantBarotropic#

class shamrock.model_ramses.InstantBarotropic#

Bases: pybind11_object

Instantaneous barotropic cooling (RAMSES-like), to be given to cfg.set_cooling_mode.

At the end of each timestep, before the CFL condition, the internal energy of every cell is overwritten by \(P_{\rm baro}(\rho) / (\gamma - 1)\), with \(\gamma\) the adiabatic index of the equation of state and \(P_{\rm baro}(\rho) = c_{s,0}^2 \rho (1 + (\rho / \rho_0)^{\gamma_0 - 1})\).

Parameters#

rho0float: Density of the isothermal to adiabatic transition of the barotrope (> 0)
gamma0float: Adiabatic index of the barotrope above rho0
cs0float: Isothermal sound speed of the barotrope below rho0 (> 0)

Usage#

>>> from shamrock.model_ramses import InstantBarotropic
>>> cfg.set_cooling_mode(InstantBarotropic(rho0=1e-13, gamma0=1.4, cs0=0.2))

Methods

Attributes

`cs0`
`gamma0`
`rho0`

Barotropic collapse of a uniform sphere in RAMSES solver