Large-eddy simulations of turbulent flow in partially filled pipes are conducted to investigate the effect secondary currents on friction factor, first- and second-order statistics large-scale motion. The method is validated first simulated profiles mean streamwise velocity, normal stresses kinetic energy (TKE) shown be good agreement with experimental data. stronger half- three-quarters full c...

A rapid predictive tool based on the linearised Reynolds-averaged Navier-Stokes equations is proposed in this work to investigate secondary currents generated by streamwise-independent surface topography modulations turbulent channel flow. The derived coupling momentum equation Spalart-Allmaras transport for eddy viscosity, using a nonlinear constitutive relation Reynolds stresses capture corre...

abstract turbidity current is one of the most important factors that effect the sediments distribution and also their transportation and release from reservoir. in this study, effects of these currents on sedimentation process in sefidroud dam were simulated by tcm model in 30 years period. comparison between the case of turbidity currents that reach to the dam wall and release from the reservo...

A new model reference adaptive system based estimation technique for vector control of real and reactive power a brushless doubly fed reluctance generator without shaft position sensor is proposed. The rotor speed being precisely observed in closed-loop manner by eliminating the error between measured estimated inverter-fed (secondary) winding current angles stationary frame. Contrary to existi...