This paper reports the development of a new body-force model for the rotating propeller within viscous flow code and its application to uniform flow and propeller advancing with the angle of attack. A simplified quasi-steady blade element theory with the infinite-bladed propeller model (time averaged propeller induced velocity field) is coupled with the Reynolds averaged Navier-Stokes (RANS) code to determine the thrust and the torque distributions. The present effort aims to reduce the computational effort while keeping the effect of ship with motion in quasi-steady manner for propeller. The solid-surface effect on the propeller loading and power is also studied. Open-water validation simulations are done for the Methodical-AU type fixed-pitch propeller. Reported results show fair predictive agreement between the new body-force model and the experimental data.
A Smart-media is defined as a media interacted with environments surrounding an user. Rapid evolution of network technologies brings us to access information on every situation through computers embedded in the user environment. Scenario based design is an efficient way to match media design with user Needs in the next generation society. It begins with describing future user Needs using Persona and it is developed by middle ground method that iterates the process of making proto-types and creating models. This paper describes the flow of the creation process optimized for the Smart-media design we face in the next decade.
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