Consider the general form of the Reynolds transport theorem (RTT) given in Prob. 11–45. Let Bsys be the angular momentum of a system of fluid particles, where is the moment arm. We know that for a system, conservation of angular momentum can be expressed as
where is the net moment applied to the system. Use the equation given in Prob. 11—45 and this equation to derive the equation of conservation of angular momentum for a control volume.
Conservation of angular momentum for a system is given by
∑ is the net moment applied to the system