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Stochastic processes --- Queueing Theory --- 519.872 --- Queuing theory. Service systems. Numerical simulation --- Business & Economics --- Economic Theory --- 519.872 Queuing theory. Service systems. Numerical simulation

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mathematical modeling --- computation methods --- applied mathematics --- computational biology --- econophysics --- numerical simulation

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This work aims at developing a strategy how the energy which has to be applied to transport incompressible and Newtonian fluids through straight ducts can be reduced. Based on the physical properties of laminar and turbulent flow, models are derived which theoretically lead to the reduction of the dissipated energy. The possibility to implement the proposed state due to appropriate design aspects in the cross section shape of the duct is investigated based on numerical simulations of the flow

Strömungskontrolle --- direkte numerische Simulation --- direct numerical simulation --- turbulente Strömungflow control --- turbulent flow --- drag reduction --- Reibungsreduktion

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This work aims at developing a strategy how the energy which has to be applied to transport incompressible and Newtonian fluids through straight ducts can be reduced. Based on the physical properties of laminar and turbulent flow, models are derived which theoretically lead to the reduction of the dissipated energy. The possibility to implement the proposed state due to appropriate design aspects in the cross section shape of the duct is investigated based on numerical simulations of the flow

Strömungskontrolle --- direkte numerische Simulation --- direct numerical simulation --- turbulente Strömungflow control --- turbulent flow --- drag reduction --- Reibungsreduktion

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The growing need for high efficient propulsion systems allied to the demand for accuratepowerpredictionswithlowercosts,justifytheusageofnumericalsimulations by companies in order to achieve strategic advantages over their competitors.
There are two approaches which can be used to find the self-propulsion point of a vessel, either experimentally or numerically, those are the load varying method, also known as British method and the constant loading method, commonly called as Continental method.
The British method requires at least two runs for each speed to determine the selfpropulsion point, a run with an under-loaded propeller and one with an over-loaded propeller, thereafter the propulsion point may be estimated.
Experimentally, the Continental method requires only one run to determine the propulsion point for each speed, this is possible due to the presence of a RPM corrector attached to the model which can adjust the propeller velocity during the run. Numerically, this feature may bring advantage over the British method by reducing computational time.
The main objective of this work is to propose and implement a suitable numerical model to estimate the self-propulsion parameters of the KVLCC2 using the Continental method, ANSYS CFD Package will be used for analyses.
ARPMcontrollerisfirstlyimplementedonasimplerbodyandaconvergencestudy is performed in order to determine an initial setup for the KVLCC2. Self-propulsion simulations are performed using the British and Continental methods, therefore comparison regarding accuracy and computational time between the two numerical methods are made. Finally, the report ends with conclusions and suggestions for further investigations.

CFD, self-propulsion, continental-method, british-method, numerical simulation --- Ingénierie, informatique & technologie > Ingénierie civile