Bubble terminal velocity using Stokes solution
function v_Stokes input SI.Length d_e "Equivalent bubble diameter as a sphere"; input SI.Density rho_l "Liquid density"; input SI.Density rho_v "Vapor density"; input SI.DynamicViscosity mu_l "Liquid dynamic viscosity"; input SI.Acceleration g = Modelica.Constants.g_n "Acceleration due to gravity"; output SI.Velocity v "Bubble terminal velocity"; end v_Stokes;