In nature, there exists a special group of aquatic animals which have an axisymmetric body and whose primary swimming mechanism is to use periodic body contractions to generate vortex rings in the surrounding fluid. Using jellyfish medusae as an example, this study develops a mathematical model of body kinematics of an axisymmetric swimmer and uses a computational approach to investigate the in...

In this study, a three-dimensional model for underwater explosion bubble dynamics is established using weakly compressible theory implemented in the boundary integral method. To validate its accuracy and reliability, we compare model's results with theoretical solutions, an axisymmetric model, experimental data. First, systematically study jet characteristics of free field reveal power laws hei...

In this paper the flow field of a rectangular synthetic jet driven by a piezoelectric membrane issuing into a quiescent environment is studied. The similarities exhibited by synthetic and continuous turbulent jets lead to the hypothesis that a rectangular synthetic jet within a limited region downstream of the orifice be modeled using similarity analysis just as a continuous planar jet. Accordi...

Based on the linear stability analysis, a mathematical model for of viscous liquid jet in coaxial twisting compressible airflow has been developed. It takes into account twist and compressibility surrounding airflow, viscosity jet, cavitation bubbles within jet. Then, effects aerodynamics caused by gas–liquid velocity difference are analyzed. The results show that under ejecting effect, instabi...

We discuss stationary and axisymmetric transmagnetosonic outflows in the magnetosphere of a rotating black hole (BH). Ejected plasma from source located near BH is accelerated far away to form relativistic jet. In this study, acceleration efficiency conversion fluid energy electromagnetic are considered by employing transfast magnetosonic flow solution derived Takahashi Tomimatsu (2008). Consid...

An experimental study of the mixing enhancement and changes in flow structure arising from the interaction of weak normal shock waves with turbulent jets was conducted. The experimental configuration was an axisymmetric jet processed by weak normal shock waves propagating in a shock tube along the jet axis. Experiments involved three different jet gases: helium, air, and carbon dioxide, each in...

The axisymmetric visco-resistive magnetohydrodynamic steady states allowing flows (i.e. non-vanishing velocity fields) are computed for a toroidal JET-like geometry. It is shown that spatially inhomogeneous heating of moderate magnitude leads to an increase typical speeds with respect the situation uniform temperature identical mean Hartmann numbers. A symmetry argument introduced capture break...

Breakup of electrified jets is important in applications as diverse as electrospraying, electroseparations and electrospray mass spectrometry. Breakup of a perfectly conducting, incompressible Newtonian liquid jet surrounded by a passive insulating gas that is stressed by a radial electric field is studied by a temporal analysis. An initially quiescent jet is subjected to axially periodic shape...