Two Functions Added, and a Cylinder Appeared — Complex Potential and d'Alembert's Paradox
·7 min read
Adding a doublet to a uniform stream draws a cylinder without sketching one. With zero circulation the pressure integral leaves only roundoff for drag.
Why a Spinning Ball Curves — Circulation, Magnus, and the Kutta–Joukowski Theorem
·6 min read
At U=10 and R=0.5 the three circulations send top-surface Cp from -3 to -15. At critical spin the lower stagnation point sits at Cp=1.