For a rotating cylinder with circulation about 4πrv[infinity], the stagnation streamline is located away from the surface of the body: here, r is the cylinder radius, and v[infinity] is the freestream speed. consider a case when the circulation, γ, equals 8πrv[infinity]. a. write out an expression for the potential function, ɸ. b. determine the speed, v(θ), along the surface of the cylinder, where r = r. c. using the bernoulli equation, find the pressure coefficient, cp, and plot it versus angle, θ.