Flow fields around the rod tip at low flow velocity, results from the ...
The mean velocity , depicted in Fig. 5 (d) over a period of 1 s shows two separation regions near the rod tip . Fig. 6 includes the quantitative comparison between the calculated and measured ...
The results demonstrate that the SPH method effectively reproduces experimental observations of water surface deformation and the flow field surrounding the projectiles. The intensity of underwater shock waves and the formation of cavities around the projectiles are shown to depend on both the impact velocity and the projectile's tip geometry.
Tip shape effects on the axial
The influence of tip shape on flow -induced vibration of a cantilever rod subjected to axial water flow is experimentally investigated, through optical tracking of the rod movement and mapping of the instantaneous flow field around the rod tip .
Reduced-order velocity fields from DMD reconstructions identified the most energy-containing coherent structures persistent in the near-wall region. This research provides experimental data sets and analyses of flow behavior in rod bundles with hexagonal spacer grids.
Experimental study of flow field and transition characteristics in rod ...
In conjunction with a differential pressure transmitter, the flow properties and fluid transitions were also explored. The experimental results reveal that the relative velocity gradient in the rod bundle channel is more significant at lower Reynolds numbers. As the Reynolds number increases, the relative velocity distribution becomes more uniform.
The sources of excitation that sustain the rod vibration include turbulent buffeting, movement-induced excitation, and flow separation at the rod tip , whilst the observed dynamic responses of the ...
Investigations on Flow Pattern and Pressure inside SEN below Stopper Rod
The flow pattern inside the SEN plays an important role for the bubble formation at the argon injection nozzle at the stopper rod tip . High flow velocities are reached in the small gap between stopper rod and the surrounding SEN walls, and a flow separation has to be expected after the gap due to the fast expansion of the cross section.
Instantaneous velocity vectors through the tip gap from URANS have a two-dimensional shape, and the overall calculated flow field seems to be highly damped with more flow blockage generation.
Analysis of the Flow Field at the Tip of an Axial Flow ...
The pre-stall POD results show that the important flow features can be extracted and revealed in the low -order modes, which are not obvious in the original flow field . When the stall cells are formed and developed, the flow characteristics are gradually determined by the modes, which are related to the features of the stall cells.
Rod flow is the study of fluid-particle interactions involving rod -like objects, integrating flow physics, transport phenomena, and mathematical models. It employs deterministic models (e.g., Jeffery's equation) and stochastic approaches to capture rod alignment, rotation, and complex flow behaviors. Practical applications span nuclear reactor coolant flows , microfluidic watermills, and ...