Reconnection of vortex tubes with axial flow
نویسندگان
چکیده
منابع مشابه
Dynamical aspects of vortex reconnection of perturbed anti-parallel vortex tubes
The phenomenon of vortex reconnection is analysed numerically and the results are compared qualitatively with the predictions of a model of reconnection recently proposed by Saffman. Using spectral methods over both uniform and strained meshes, numerical simulations are performed of two nearly parallel, counter-rotating vortex tubes, over the range of Reynolds numbers Re = 1000-3500. The calcul...
متن کاملA model of vortex reconnection
A model i s proposed to describe the breaking and rejoining of vortex lines which occurs when vortex filaments of equal and opposite strengths touch. It is based on the idea that viscosity cancels the vorticity where the filaments first touch. The weakening of the centrifugal force in the vortex core then leads to a local increase in the pressure which accelerates the fluid in the cores in the ...
متن کاملReconnection of colliding vortex rings.
We investigate numerically the Navier-Stokes dynamics of reconnecting vortex rings at small Reynolds number for a variety of configurations. We find that reconnections are dissipative due to the smoothing of vorticity gradients at reconnection kinks and to the formation of secondary structures of stretched antiparallel vorticity which transfer kinetic energy to small scales where it is subseque...
متن کاملMeasurements of Film Flow Rate in Heated Tubes with Various Axial Power Distributions
Measurements of film mass flow rate for annular, diabatic steam-water flow in tubes are presented. The measurements were carried out with four axial power distributions and at several axial positions at conditions typical for boiling water reactors, i.e. 7 MPa pressure and total mass flux in a range from 750 to 1750 kg/ms. The results show that the influence of the axial power distribution on t...
متن کاملSmoke Sheets and Vortex Filaments with Flexible Reconnection
Smoke is one of the core phenomena which fluid simulation techniques in computer graphics have attempted to capture. Its behavior is well understood mathematically, and accurate smoke simulation can greatly enhance the realism of computer generated effects. In an attempt to overcome the diffusion inherent to Eulerian grid-based simulators, a technique has recently been developed which represent...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review Fluids
سال: 2019
ISSN: 2469-990X
DOI: 10.1103/physrevfluids.4.024701