flat-plate-skin-friction-heatinglisted

# Flat Plate Skin Friction Heating (aerodynamics/high-speed/flat-plate-skin-friction-heating) Use when the task is estimating the convective skin friction heating on a flat plate or vehicle skin away from the leading edge at high Mach: recovery factor, adiabatic wall temperature, Eckert reference temperature, Sutherland viscosity, local skin friction coefficient and cold-wall heat flux for laminar or turbulent boundary layers. This leaf implements the classical compressible boundary-layer model in pure Python, stdlib only, with the module constants from the leaf spec (GAMMA = 1.4, R = 287.0, CP = 1005.0, PR = 0.71, MU_REF = 1.716e-5, T_REF = 273.15, SUTH_S = 110.4). It pairs with aerodynamics/high-speed/aerodynamic-heating for the leading-edge counterpart and with the inviscid shock leaves for the flow-field context around the boundary layer. ## Domain quick reference - Recovery factor: laminar r = sqrt(PR) about 0.8426, turbulent r = PR**(1/3) about 0.8921 for air. The factor converts kinetic heating into the driving temperature for heat transfer. - Adiabatic wall temperature: T_aw = T_inf * (1 + r * (GAMMA - 1) / 2 * M**2). This is the wall temperature at which the net convective flux is zero; it is the correct reference for the flux, not T_inf. - Eckert reference temperature: T_star = T_inf * (1 + 0.032 * M**2 + 0.58 * (T_wall / T_inf - 1)), the compressibility-corrected temperature for evaluating the local properties. - Sutherland viscosity: mu = MU_REF * (