thereby producing a nearly monotonic transition of flow properties through the shock Structure. Evidently, under these conditions, the dissipative terms in the modified governing equations are large in magnitude compared to the dispersive terms. The behavior of shock waves in transonic channel flow with varying Reynolds and Prandtl numbers is examined using analytical and numerical methods. It ...

There is a need for an effective and noninvasive treatment for intractable bone marrow edema syndrome of the hip. Forty-six patients with intractable bone marrow edema syndrome of the hip were retrospectively studied to compare the short-term clinical effects of treatment with high-energy extracorporeal shock wave therapy vs femoral head core decompression. The postoperative visual analog scale...

Complex coronary artery disease with severe calcification can be challenging to treat, a higher risk of procedural complications and major adverse cardiac events. Intravascular lithotripsy (IVL) is pioneering technology for the treatment critically calcified coronaries. IVL utilizing localized pulsatile sonic pressure waves at low provides novel approach lesion preparation severely plaques. The...

In experimental study of spherical shock waves in a conical tube, it was found that the amplitude wave turns out to be less than calculated on assumption instantaneous removal diaphragm separating high and low pressure chambers. To interpret revealed effect, we analyzed results numerical modeling, taking into account effect fragments formation propagation wave.

We investigate left-handed (LH) travelling-wave fieldeffect transistors (TWFETs) to observe the reverse Doppler effect. Due to the nonlinearity, a TWFET can support shock fronts that can reflect incoming waves. By introducing the composite right/left-handed line structure to a TWFET, it enables to support LH waves. Because the shock front functions as a moving reflection wall to the incoming LH...

OBJECTIVES Low energy shock waves have been shown to induce angiogenesis, improve left ventricular ejection fraction and decrease angina symptoms in patients suffering from chronic ischemic heart disease. Whether there is as well an effect in acute ischemia was not yet investigated. METHODS Hind-limb ischemia was induced in 10-12 weeks old male C57/Bl6 wild-type mice by excision of the left f...

Coal and gas outbursts are dynamic failures that can involve the ejection of thousands tons of pulverized coal, as well as considerable volumes of gas, into a limited working space within a short period. The two-phase flow of gas and pulverized coal that occurs during an outburst can lead to fatalities and destroy underground equipment. This article examines the interaction mechanism between pu...

In the current research the maximum deflection of circular plates made of AA5010 and AA1100 alloys under blast load was investigated. Shock waves were produced by exploding a spherical charge in different distances from the center of plates. The ABAQUS software uses conwep equation for blast loading analysis. It was found the results of these simulations have about 30% to 40% inaccuracy in comp...

Free gas bubbles in water with radii between 7 and 55 microm subjected to a shock wave exhibit a liquid jetting phenomenon with the jet pointing in the direction of the propagating shock wave. With increasing bubble radius, the length of the jet tip increases and a lower estimate of the averaged jet velocity increases linearly from 20 to 150 m/s. At a later stage, the jet breaks up and releases...

The behavior of shock waves in transonic channel flows with varying Reynolds and Prandtl numbers is examined using analytical and numerical methods. It is shown that the location of the sonic line within the structure of a shock wave is independent of the Reynolds number and is coincident with the location of the corresponding discontinuous wave in the limit as the Reynolds number tends to infi...