shamrock.phys.epstein_supersonic_correction

shamrock.phys.epstein_supersonic_correction(*, delta_v: float, cs: float) → float

Epstein drag supersonic correction factor for spherical dust grains.

Corrects the Epstein drag force when the drift speed between dust and gas exceeds the thermal speed.

f$f(Delta v, c_s) = sqrt{1 + frac{9pi}{128} frac{Delta v^2}{c_s^2}}f$

Args:

delta_v: Drift speed between dust and gas cs: Gas sound speed

Returns:

The supersonic correction factor f(delta_v, cs)