The main goal of this research is to study the drag reduction capabilities of blade-shape riblet surfaces in external flows. For this purpose. the ability of riblet surfaces for drag reduction of an underwater hydrodynamic model has been investigated. The surface geometry has been modified by applying shark skin inspired blade-shape riblets on the surface. https://www.markbroyard.com/hot-deal-jolly-rancher-filled-gummies-7oz-online-hot-sale-big-sale/