The complete 3D nonlinear dynamic problem of extensible, flexible risers conveying fluid is considered. For describing the dynamics of the system, the Newtonian derivation procedure is followed. The velocity field inside the pipe formulated using hydrostatic and Bernoulli equations. The hydrodynamic effects of external fluids are taken into consideration through the nonlinear drag forces in var...

Massively parallel finite element computations of 3D, unsteady incompressible flows, including those involving fluid-structure interactions, are presented. The computations with time-varying spatial domains are based on the deforming spatial domaidstabilized spacetime (DSD/SST) finite element formulation. The capability to solve 3D problems involving fluid-structure interactions is demonstrated...

in this paper, nonlinear vibration and instability response of an embedded pipe conveying viscose fluid is investigated. the pipe is considered as a timoshenko beam embedded on an elastic foundation which is simulated by spring constant of the winkler-model and the shear constant of the pasternak-model. the external flow force, acting on the beam in the direction of the flexural displacement is...

The pneumatic conveying process of fine particles through filters was studied by CFD-DEM simulation method. porous media model and structure were used to simulate the airflow state blocking effect when they flowed filter. Under different particle feed rates initial velocities, effects plugging rate settling velocity in pleated analyzed, deposition height on fluid zone studied. results showed th...

In order to increase the efficiency of the conveyance of the granular solids, a new experimental set-up is designed. The test rig has longitudinal trapezoidal slots in its conveying pipes. Through experimentation, a correlation for friction factor in terms of solid mass flow rate, fluid flow rate and Froude number is presented. It is shown that the mixture friction factor for pipes with inn...

Research on turbulent drag reduction has been limited owing to the limitations of existing parameters used for identification vortex structures. As a new and more suitable parameter, Liutex provides novel research method turbulence control. We channel with transverse groove structure as model employed large-eddy simulation based study influence mechanism watershed. The analysis revealed that si...

It is generally acknowledged that a hanging cantilevered pipe conveying fluid becomes unstable by flutter-type instability at critical flow velocity; moreover, the undergoes periodic self-excited oscillations in post-flutter region. Additionally, velocity increases when magnetized exposed to an actuating parallel magnetic field. The question arises as whether field leads lessening oscillation a...