کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
651053 1457399 2016 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On the Lagrangian features of circular and semicircular jets via 3D Particle Tracking Velocimetry
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
On the Lagrangian features of circular and semicircular jets via 3D Particle Tracking Velocimetry
چکیده انگلیسی


• 3D PTV was employed to describe jets from circular and semi-circular pipes.
• PDF of the velocity, acceleration, and curvature revealed distinctive features.
• Velocity fluctuations PDF showed departure from Gaussian away from the core.
• Acceleration PDF exhibited heavy tails in the two jets.
• Curvature PDF revealed distinctive footprint of the pipe shape.

Three-dimensional Particle Tracking Velocimetry was employed to characterize jets from circular and semi-circular pipes in the intermediate and far fields. Grid-interpolated velocity were used to validate the measurements, and confirmed the negligible effect of the pipe shape on the mean flow in the intermediate field. Several volumetric regions were defined to get Lagrangian statistical description of the flow from categorized particle trajectories. Probability density functions of the velocity fluctuations, particle acceleration, and curvature of the trajectories revealed common and distinctive features of the jets. The first one showed departure from the Gaussian distribution away from the core, and the acceleration exhibited heavy tails in the two jets; however the curvature pdf revealed distinctive footprint of the pipe shape.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Experimental Thermal and Fluid Science - Volume 77, October 2016, Pages 306–316
نویسندگان
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