In this paper we carry out a semi-analytic general relativistic study of Gamma-Ray Bursts (GRB) jet that is breaking cocoon or stellar envelope. We solve hydrodynamic equations with the equation state takes care fluid composition. short GRBs, approach required to account for curved spacetime in strong gravity. The piercing through resembles de Laval nozzle and may go recollimation shock transit...

The research on seafloor massive sulfide (SMS) started relatively late, and the results its breaking process are few. However, contains evaluation indexes of safe, efficient low-disturbance mining, so it is necessary to study sulfide. At same time, finite element method used in most existing researches, system will automatically delete failure from during simulation rock-breaking, resulting ina...

Using of nanofluids and ducts with corrugated walls are both supposed to enhance heat transfer, by increasing the heat transfer fluid conductivity and the heat transfer area respectively. Use of a diverging duct with a jet at inlet section may further increase heat transfer by creating recirculation zones inside the duct. In this work two-dimensional incompressible laminar flow of a nanofluid e...

numerical study has been carried out for slot air jet impingement cooling of horizontal concentric circular cylinders. the slot air jet is situated at the symmetry line of a horizontal cylinder along the gravity vector and impinges to the bottom of the outer cylinder which is designated as θ=0°. the outer cylinder is partially opened at the top with width of w=30mm and is kept at constant tempe...

We present an experimental study of the flapping instability which appears when a coaxial liquid jet is atomized by a cocurrent fast gas stream. When primary atomization does not lead to a total break-up of the liquid jet, it undergoes a largewavelength instability, characterized by very large amplitude oscillations, and can break into large liquid fragments whose typical size is the jet diamet...

introduction jet stream is strong narrow current concentrated by strong vertical and lateral wind shears (vasantha et al, 2002). according to world meteorological organization nomenclature, jet stream formed when the speed of wind greater than 60 knots or 30 m/s. the major characteristics of the troposphere and lower stratosphere in the vicinity of jet streams were pointed out by a group of met...