Evaluation of Air/Cavitation Interaction Inside a Vane Pump
... vane pump used in lubrication circuits for heavy duty applications. All the presented simulations were performed by Fluent v12 (Beta version) CFD code. In particular, the main goal of this analysis was to clarify the reasons of localized mechanic erosion (compatible with cavitation phenomena) observ ...
... vane pump used in lubrication circuits for heavy duty applications. All the presented simulations were performed by Fluent v12 (Beta version) CFD code. In particular, the main goal of this analysis was to clarify the reasons of localized mechanic erosion (compatible with cavitation phenomena) observ ...
USING STANDARD SYSTE - UW Madison Plasma Physics
... universality of shear suppression in plasmas and the dynamical similarities between plasmas and ordinary nonionized fluids strongly suggest that shear suppression should occur in nonionized fluids and in other types of dynamic media. Section VIII provides a few examples that have been examined to da ...
... universality of shear suppression in plasmas and the dynamical similarities between plasmas and ordinary nonionized fluids strongly suggest that shear suppression should occur in nonionized fluids and in other types of dynamic media. Section VIII provides a few examples that have been examined to da ...
ABSTRACT Trinity: A Unified Treatment of Turbulence, Transport, and Heating in Magnetized Plasmas
... my way in research and in life over these last several years. Above all, I want to thank my advisor, Bill Dorland. He has been an endless source of new and exciting ideas throughout this research. His enthusiasm and energy have provided me with constant encouragement, and his confidence in my abilit ...
... my way in research and in life over these last several years. Above all, I want to thank my advisor, Bill Dorland. He has been an endless source of new and exciting ideas throughout this research. His enthusiasm and energy have provided me with constant encouragement, and his confidence in my abilit ...
Formation and loss of hierarchical structure in two
... incoming streams of shear Alfvén waves. The resulting structures have power-law characteristics in both space and velocity. Goldreich & Sridhar (1995) also considered turbulence driven by shear Alfvén wave interactions, but treated only the incompressible case. Our results imply that molecular clo ...
... incoming streams of shear Alfvén waves. The resulting structures have power-law characteristics in both space and velocity. Goldreich & Sridhar (1995) also considered turbulence driven by shear Alfvén wave interactions, but treated only the incompressible case. Our results imply that molecular clo ...
Magnetic reconnection and relaxation phenomena in Spherical Tokamak
... short time scale (typically, 100τ A ) but the event has a property of resiliency. We have tried to reconstruct the plasma behavior on MHD simulation modeling in a full toroidal 3D geometry described on the cylindrical coordinate. The simulations have reproduced several key features of IRE (Hayashi e ...
... short time scale (typically, 100τ A ) but the event has a property of resiliency. We have tried to reconstruct the plasma behavior on MHD simulation modeling in a full toroidal 3D geometry described on the cylindrical coordinate. The simulations have reproduced several key features of IRE (Hayashi e ...
1 ATOMIZATION OF HIGHLY VISCOUS FLUIDS Nasser Ashgriz
... sheet. By having a diverging section inside the nozzle, the liquid is forced to spread out as a fan. As the fan becomes larger, the thickness of the liquid sheet forming the fan becomes smaller. Theoretically, the sheet can be made very thin, and therefore, it is possible to generate very small d ...
... sheet. By having a diverging section inside the nozzle, the liquid is forced to spread out as a fan. As the fan becomes larger, the thickness of the liquid sheet forming the fan becomes smaller. Theoretically, the sheet can be made very thin, and therefore, it is possible to generate very small d ...
Charged Barrier Technology THE FOGAL TRANSISTOR WITH THE
... In short, one has produced a deliberate "pinpoint, repelling force field" upon each of the incoming atoms and molecules of the medium, without any matching recoil force upon the moving vehicle. Better, all the energy in the force field is concentrated only upon the targets, rather than distributed u ...
... In short, one has produced a deliberate "pinpoint, repelling force field" upon each of the incoming atoms and molecules of the medium, without any matching recoil force upon the moving vehicle. Better, all the energy in the force field is concentrated only upon the targets, rather than distributed u ...
Effect of parallel velocity shear on the electrostatic ion
... the shear is not expected to change due to the fact that the flow velocity does not change with increasing ⫺V rd for ⫺V rd ⬎3 V. This is also evidenced by the observation that the amplitude of the low frequency instability also remains constant. We believe this to be the simplest and most reasonable ...
... the shear is not expected to change due to the fact that the flow velocity does not change with increasing ⫺V rd for ⫺V rd ⬎3 V. This is also evidenced by the observation that the amplitude of the low frequency instability also remains constant. We believe this to be the simplest and most reasonable ...
No Slide Title - Lemon Bay High School
... • Explain why some objects float and some objects sink. ...
... • Explain why some objects float and some objects sink. ...
Turbulence
In fluid dynamics, turbulence or turbulent flow is a flow regime characterized by chaotic property changes. This includes low momentum diffusion, high momentum convection, and rapid variation of pressure and flow velocity in space and time.Flow in which the kinetic energy dies out due to the action of fluid molecular viscosity is called laminar flow. While there is no theorem relating the non-dimensional Reynolds number (Re) to turbulence, flows at Reynolds numbers larger than 5000 are typically (but not necessarily) turbulent, while those at low Reynolds numbers usually remain laminar. In Poiseuille flow, for example, turbulence can first be sustained if the Reynolds number is larger than a critical value of about 2040; moreover, the turbulence is generally interspersed with laminar flow until a larger Reynolds number of about 4000.In turbulent flow, unsteady vortices appear on many scales and interact with each other. Drag due to boundary layer skin friction increases. The structure and location of boundary layer separation often changes, sometimes resulting in a reduction of overall drag. Although laminar-turbulent transition is not governed by Reynolds number, the same transition occurs if the size of the object is gradually increased, or the viscosity of the fluid is decreased, or if the density of the fluid is increased. Nobel Laureate Richard Feynman described turbulence as ""the most important unsolved problem of classical physics.""