Book Review: governance in pacific Asia: political economy and development from Japan to Burma

In his latest book, Peter Ferdinand discusses the increasing economic integration of the Pacific Asian region as well as its impact on global affairs. Kent Deng is impressed by the breadth of the book’s coverage and the way it rethinks the once narrowly conceived boundaries of Asia

Risk preferences and development revisited

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Swirl Boundary Layer at the Inlet of a Rotating Circular Cone

International audienceWhen a fluid enters a rotating pipe, a swirl boundary layer with thickness of $δ_S$ appears at the wall and interacts with the axial momentum boundary layer with thickness of $δ$. The swirl is produced by the wall shear stress and not due to kinematic reasons as by a turbomachine. In the center of the pipe, the fluid is swirl-free and is accelerated due to axial boundary layer growth. Below a critical flow number $ϕ < ϕ_c$, there is flow separation, known in the turbomachinery context as part load recirculation. Previous work analyses the flow at the inlet of a rotating circular pipe. For a systematic approach to a turbomachine, the influence of the turbine's and pump's function, schematically fulfilled by a diffuser and a nozzle, on the evolution of the swirl and flow separation is to analyse. The radius of the rotating pipe depends linearly on the axial coordinate, yielding a rotating circular cone. The swirl evolution depends on the Reynolds number, flow number, axial coordinate and apex angle. The influence of the la er is the paper's main task. The circumferential velocity component is measured applying 1D Laser Doppler Anemometry to investigate the swirl evolution