Thermal Circuit Solver

Conduction

Cylinder: R = ln(r₂/r₁) / (2πLk)

Fin Geometry (Matches Python)

N_fins = 1 / (t + gap)

r_oc = r_tip + t/2 (Corrected Radius)

A_fin = N · 2π (r_oc² - r_base²) · L

A_base = N · 2π r_base · gap · L

Fin Resistance (Parallel)

R_base = 1 / (h A_base)

R_fins = 1 / (h η A_fin)

R_eq = (R_base · R_fins) / (R_base + R_fins)