Cutting efficiency and quality are very sensitive to gas jet pressure and nozzle standoff distance. Do a high gas pressure and a small standoff distance necessarily give better material removal capability and cutting quality? Simple experiments to measure the mass flow rate were carried out for two types of geometry: a circular hole and a linear cut directly underneath an axisymmetric nozzle. T...

Abstract In order to improve the validity of bottom hole pressure model, and simplify its calculation process, a mathematical model instantaneous for unsteady flow was established by considering crossflow between fractures matrix. Different conditions, including reservoir top has constant pressure, were considered. The basis obtaining is solve diffusivity equation with integration axisymmetric ...

A robust and low dead volume world-to-chip interface for thermoplastic microfluidics has been developed. The high pressure fluidic port employs a stainless steel needle inserted into a mating hole aligned to an embedded microchannel, with an interference fit used to increase pressure resistance. Alternately, a self-tapping threaded needle screwed into a mating hole is also demonstrated. In both...

We study physical properties of a Schwarzschild-type black hole in the framework recently proposed Starobinsky-Bel-Robinson (SBR) modified theory gravity, working perturbatively new coupling constant. In particular, we compute temperature, entropy, pressure and lifetime hole.

The Bitter decoration technique is used to study the trapping of single and multiple quanta vortices by a lattice of circular microholes. By keeping a thin superconducting layer (the bottom) inside each hole we are able to visualise the trapped vortices. From this we determine, for the first time, the filling factor FF, i.e. the number of vortices captured inside a hole. In all cases the sample...

We first review the general class of accelerating, rotating and charged Plebanski-Demianski (PD) black holes in presence cosmological constant, which includes Kerr-Newman hole Taub-NUT spacetime. assume that thermodynamical pressure may be described by negative so represents anti-de Sitter (AdS) PD hole. The thermodynamic quantities like surface area, entropy, volume, temperature, Gibb's Helmho...