Improvement of nondestructive inspection techniques has made more frequent the detection zones containing closely spaced non-metallic inclusions in pressure vessels low carbon steel. In present study, an in-service cylindrical horizontal vessel were detected by Scan-C ultrasonic and considered as laminations to be assessed Part 13 API 579-1/ASME FFS-1 2016 standard. The outcoming results reject...

Analysis of the work, which considered mathematical modeling melting process in various industries, currently does not pay attention to processes heating and hydrocarbon mixtures, such as vaseline, paraffin, fats, lanolin others. The issue optimization processes, calculations necessary parameters (speed depth thermal front penetration, etc.) equipment, avoidance repetition for each mixture expe...

Over the years, the ev8 code has been a very useful tool for the study of nuclear mean-field theory. Its main characteristic is that it solves the Hartree-Fock plus BCS equations for Skyrme type functionals via a discretization of the individual wave-functions on a three-dimensional cartesian mesh. This allows maximal flexibility in the determination of the nuclear shape by the variational proc...

The research was conducted on an experimental stand, which consists of outer metal vessel a cylindrical shape, inner vessel, cover with external insulation, thermocouples, device for collecting information from thermocouples and its transfer to the computer. In working volumes vessels, deviation temperature values average volume by high at moment time is within 10...38 % tare liquids. non-...

Keywords: Hopscotch scheme Thermal explosion Nonlinear source term Linear stability analysis a b s t r a c t Numerical solutions to the Frank-Kamenetskii partial differential equation modelling a thermal explosion in a cylindrical vessel are obtained using the hopscotch scheme. We observe that a nonlinear source term in the equation leads to numerical difficulty and hence adjust the scheme to a...

We studied alterations in structural and mechanical properties of mesenteric arterial resistance vessels from young (6-week) and old (50-week) spontaneously hypertensive (SHR)and matched normotensive Wistar-Kyoto (WKY) rats. Emphasis was placed upon relating the active tension capabilities of these vessels to their smooth muscle cell content. Cylindrical segments, 0.7 mm long with internal diam...

The phenomenon of steam–water direct contact condensation has significance in a wide range industrial applications. Superheated steam was injected upward into cylindrical water vessel. Visual observations were conducted on turbulent jet to determine the dimensionless length compared nozzle exit diameter and maximum swelling ratio as function mass flux at exit, with gas ranging from 295–883 kg/m...

OBJECTIVE The Pipeline embolization device (PED; Chestnut Medical, Menlo Park, CA) is a new endovascular construct designed to exclude aneurysms from the parent cerebrovasculature. We report the results of the first two human implantations of this device in North America. CLINICAL PRESENTATION Two patients presenting with large, symptomatic, circumferential, fusiform intracranial vertebral ar...

Most computations of arterial mechanics treat the wall as a mechanically homogeneous body, but there are no data to support or refute this. To evaluate this assumption, experiments were performed that measured the deformation of 4 elastic lamellae located at 4 equidistant points across the thickness of the media. Data were obtained at 25-mm Hg pressure steps between 0 and 200 mm Hg. To satisfy ...