نتایج جستجو برای: jet streams location
تعداد نتایج: 294000 فیلتر نتایج به سال:
Context. High-resolution millimeter wave very-long-baseline interferometry (mm-VLBI) is an ideal tool for probing the structure at the base of extragalactic jets in detail. The TeV blazar Mrk 501 is one of the best targets among BL Lac objects for studying the nature of off-axis jet structures because it shows different jet position angles at different scales. Aims. The aim of this study is to ...
Four Bok globules were studied in the Near-Infrared, through narrow-band filters, centered at the 1.644 μm line of [FeII], the H2-line at 2.122 μm, and the adjacent continuum. We report the discovery of [Feii] and H2 protostellar jets and knots in the globules CB3 and CB230. The [FeII]-jet in CB230 is defined by a continuous elongated emission feature, superimposed on which two knots are seen; ...
Introduction: Dental trauma is a very significant problem in primary dentition. It has a physical, esthetic and psychological impact on the child and his/her parents. The purpose of this study was to assess the prevalence of traumatic injuries to the anterior primary teeth and determining factors in 2-5-year-old children in Rasht, 2012. Materials and Methods: This research was a cross-sectio...
In this paper, construction of triplet atmospheric plasma jet using argon, air, oxygen and nitrogen gases is reported. Bactericidal effect of the plasma jet is also investigated. To that end, longitudinal geometric configuration for the electrodes was chosen because it would increase the jet length. Electrical characteristics, jet length dependencies on the applied voltage and gas flow rate wer...
Coalbed methane extraction promotes energy exploitation and alleviates the greenhouse effect. This study aimed to analyze technical potential of a high-pressure gas–liquid two-phase jet in increasing coalbed permeability promoting extraction. A well-designed experimental setup was used investigate erosion characteristics jet. Through shock pressure monitoring tests jet, effects pump pressure, m...
The present study proposes novel micro-jet impingement heat sink with effusion holes for flow extraction. The design consists of impingement nozzles surrounded by multiple effusion holes to take away the spent fluid. A three-dimensional numerical model is used for steady, incompressible, laminar flow and conjugate heat transfer for the performance analysis of the proposed design. The computatio...
The current study numerically investigates an active mixing enhancement technique for a supersonic ejector with constant area chamber operating under the critical regime. Streamwise control jet injections are alternatively pulsed at top and bottom sides of entrance. induced oscillation primary enhances bulk between secondary streams. stream penetrates core flow much upstream strategy compared t...
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