1,721,641 research outputs found
Generation of upper trailing counter-rotating vortices of a sonic jet in a supersonic crossflow: Generation of upper trailing CRVs of transverse sonic jet in a supersonic crossflow at Ma=2.7
No full textDirect numerical simulations were conducted to investigate physical structures of a transverse sonic air jet injected into a supersonic air crossflow at a Mach number of 2.7. Simulations were run for two different jet-to-crossflow momentum flux ratios (J) of 1.85 and 5.5. The main averaged flow features around the transverse jet, such as major counter rotating vortices (CRVs) and trailing CRVs (TCRVs) were captured. The major CRVs form in the lateral portion of the jet plume and absorb other induced trailing vortices downstream of the jet plume. Upper trailing CRVs form above the major CRVs downstream of the jet barrel shock. The streamline analysis indicates that the upper trailing CRVs are related to the Mach disk. As the streamlines penetrate the lateral side of Mach disk where a strong shear condition exists, the baroclinic torque induces upper vorticities in the opposite rotating direction against the major CRVs. Downstream of the Mach disk, the baroclinic vorticity production along the streamlines tends to approach zero, which means no more torque is pumped into the farfield and the upper TCRVs are merged into the major CRVs by their suction
Data for "Formation of surface trailing counter-rotating vortex pairs downstream of a sonic jet in a supersonic crossflow"
No full textData set for Paper "Formation of surface trailing counter-rotating vortex pairs downstream of a sonic jet in a supersonic crossflow" published in Journal of Fluid Mechanics.
The files are named by the figure numbers, e.g. figure3a.lpk, together with figure3a.dat, contain all data for Figure 3(a) in the paper, and can be opened by Tecplot. </span
Dataset for 'Turbulence structures and statistics of a supersonic turbulent boundary layer subjected to concave surface curvature'
No full textThis dataset contains data files for the paper
"Turbulence structures and statistics of a supersonic turbulent boundary layer subjected to concave surface curvature" by Sun, Mingbo; Sandham, Neil; Hu, Zhiwei published by Journal of Fluid Mechanics.
They can be opened in Tecplot</span
Recovery of a supersonic turbulent boundary layer after an expansion corner
No full textSupersonic turbulent flows at Mach 2.7 over expansion corners with deflection angles of 0° (flat plate), 2° and 4° have been studied using direct numerical simulation. Distribution of the skin friction, pressure, velocity and the boundary layer growth show that the turbulent boundary layer experiences a recovery from a non-equilibrium to an equilibrium state downstream of the expansion corner. Analysis of velocity profiles indicates that the streamwise velocity undergoes a reduction in the near-wall region even though the velocity in the core part of the boundary layer is accelerated after the expansion corner. Growth of the boundary layer was evaluated and a higher shape factor was found in the expansion cases. Turbulence was found to be suppressed downstream of the corner, and throughout the recovery region, even though turbulence is regenerated in the near-wall region. The expansion ramp increases the near wall streak spacing compared to a flat plate and turbulent kinetic energy profiles and budgets exhibit a characteristic two-layer structure. Near-wall turbulence recovers to the equilibrium more quickly in the inner layer than in the outer layer due to a balance between the local production and dissipation. The two-layer structure is due to the history effect of the turbulence decay in the outer part of the boundary layer in the vicinity downstream of the expansion corner, which blocks the momentum and energy exchange between the inner layer and the main stream
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Dataset for Recovery of a supersonic turbulent boundary layer after an expansion corner
No full textData set for Physics of Fluids paper "Recovery of a supersonic turbulent boundary layer after an expansion corner"</span
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Synthetic landscape: renovation of Kowloon Park.
Full text linkLau Sun Ming Kenneth."Architecture Department, Chinese University of Hong Kong, Master of Architecture Programme 2005-2006, design report."Includes bibliographical references.Research WorkChapter 1.0 --- IntroductionChapter - --- City making and making of ParkChapter 2.0 --- AbstractChapter - --- Urban Parks in Hong KongChapter 3.0 --- Context of Kowloon ParkChapter - --- Nathan Road as spine of cityChapter - --- Kowloon Park as microcosmChapter - --- Comparison of Hong Kong (Kowloon Park) and Manhattan (Central Park)Chapter 4.0 --- Urban Parks IdeologyChapter - --- Park and CityChapter - --- Precedent Studies: Central ParkChapter - --- Precedent Studies : Pare de la VilletteChapter 5.0 --- Critiques on present Kowloon ParkChapter 6.0 --- Scale tectonicChapter - --- Scale and the thesis statementChapter - --- Scale and CityChapter - --- Issues of the site that potentially deal with scaleChapter - --- Theoretical PropositionChapter 7.0 --- VisionChapter 8.0 --- Design proposal (experiment)BibliographyDesign WorkChapter 1.0 --- Thesis StatementChapter 2.0 --- Site StrategiesChapter 3.0 --- Part 1 : Master Planning of New Kowloon ParkChapter 4.0 --- Part 2 : Internal Organization of existing Kowloon Park areaChapter 5.0 --- Part 3 : Individual architectural moments that explore relationship between building and natureChapter 6.0 --- Conclusio
- …
