In theory, shock tubes provide a pressure change with a very fast rise time and calculable amplitude. This pressure step could provide the basis for the calibration of pressure transducers used in highly dynamic applications. However, conventional metal shock tubes can be expensive, unwieldy and difficult to modify. We describe the development of a 1.4 MPa (maximum pressure) shock tube made fro...

This study addresses the influences of uncertain amounts of residual impurities in the computation and experimental determination of ignition-delay times in hydrogen-air mixtures in shock tubes. Experimental methods for quantifying impurities in shock tubes are described and utilized. These methods are utilized to infer an equivalent amount of impurities as a function of the initial temperature...

An investigation of the luminosity structure, electron density, temperature, and arrival time of electrode material in the shock heated region of the plasma produced in a T-tube has disclosed that for the conditions studied the luminosity from this region originates primarily from gases that have passed through the contact surface. A plausible explanation for this mixing of discharge gases with...

We propose a two-population lattice Boltzmann model on standard lattices for the simulation of compressible flows. The is fully on-lattice and uses single relaxation time Bhatnagar–Gross–Krook kinetic equations along with appropriate correction terms to recover Navier–Stokes–Fourier equations. accuracy performance are analyzed through simulations benchmark cases including Sod shock tube, sound ...

Periodic gas oscillations in a closed tube are investigated experimentally and numerically. At resonance, these oscillations are accompanied by shock waves traveling back and forth along the tube. Gas temperature and pressure measurements are reported. It is found that the gas temperature changes substantially along the tube. A two-dimensional numerical model of turbulent gas oscillations is fo...

Tube thoracostomy is a standard therapy for a number of pulmonary disorders. The procedure is associated with a certain incidence of morbidity related to the technique of insertion, the patient population selected, and the length of time the tube remains in place. Complications of tube placement previously described include empyema, residual pneumothorax, lung perforation, placement of the tube...

The transurethral prostatectomy syndrome (TURS) is defined as severe vascular hypotension reaction that complicates endoscopic surgery as a result of massive irrigating fluid absorption causing severe acute dilution hyponatraemia (HN) of <120 mmol/l. The vascular shock is usually mistaken for one of the recognized shocks and Volumetric Overload Shock type 1 (VOS1) is overlooked making Volumetri...

We present a rare case of abdominal compartment syndrome due to a bulimic attack in a 19-year-old female patient with bulimia nervosa. She was admitted to our emergency room with complaints of progressive abdominal pain following bulimia. Computed tomography showed dilated stomach with food and air pressed other visceral organs and major abdominal vessels. Decompression using nasogastric tube o...

Shock tubes are widely used in the study of chemical kinetics. Its benefits rely on almost ideal shock-heating process that provides high temperatures and pressures to a system for limited test time. Just like any reactor, shock not immune non-ideal effects. The conditions might deviate experiments from is thus utmost importance. High-speed imaging has been proven be powerful tool analyze / non...

Using a .308 bolt action rifle and a modified steel casing fitted for a .50 caliber primer, we have developed a benchtop shock tube capable of producing overpressures of up to 440 kPa. Male Sprague Dawley rats were anesthetized with isoflurane and immobilized in a Kevlar hammock offset from the muzzle to eliminate loading by the exiting gas jet and burning propellant. Injury severity from later...