"""Physical and numerical constants shared by both models. All values are SI."""

import math

SPEED_OF_SOUND = 343.0
"""Speed of sound in air [m/s]."""

RHO_AIR = 1.2
"""Density of air [kg/m^3]."""

ROOM_TEMPERATURE = 293.0
"""Default plate temperature [K], which enters the thermoelastic damping."""

CFL = 0.9
"""Fraction of the stability limit used for the time step of the full model."""

STICK_RELEASE = 5e-3
"""The stick is withdrawn once the contact has been open this long [s]."""

LN1000 = math.log(1000.0)
"""A decay rate sigma [1/s] and a decay time relate by sigma = LN1000 / T60."""