8,155 research outputs found
The Echo: September 15, 1934
No full textSaturday Reception Is Final Feature Of Frosh Week – Summer Gang Has Happy Memories – New Professors Extended Welcome By Taylor “Family” – Freshmen Welcomed By J. Author Howard – Pres. Stuart Sees Taylor Ideal Christian College – Dr. Ayres Explains Tax Exemption Law – Student Publication In Twenty-second Year of Service – Student Publication Is Important Work – Prexy Greets Freshman With Hearty Welcome – Senior President Greets New Class – Editorial – From The Editor – From The Business Manager – The Small School – Knick-Knacks – Alumni – Faculty Vacations – Prof. G.H. Evans Finishes Doctor’s Work In Chemistry – Organization Greetings – Thalos Give Welcome – Greater Taylor Spirit Aim of Student Council – T.U. Debate Club Men Welcome New Debaters – Philos Welcome You – Sophomore Pres. Glad to Return – Sport Page – Prospects for B. B. Rests on LetterMen – Athletic Department Plans Tennis, Baseball Activities – T. Club Loses Two Letter Men – Upland-Matthews H. S. Teams Will Be Merged – T Clubhttps://pillars.taylor.edu/echo-1934-1935/1000/thumbnail.jp
Measurements of small radius ratio turbulent Taylor-Couette flow
No full textIn Taylor-Couette flow, the radius ratio () is one of the key parameters of the system. For small , the asymmetry of the inner and outer boundary layer becomes more important, affecting the general flow structure and boundary layer characteristics. Using high-resolution particle image velocimetry we measure flow profiles for a radius ratio of 0.5 and Taylor number of up to . By measuring at varying heights, roll structures are characterized for two different rotation ratios of the inner and outer cylinder. In addition, we investigate how the turbulent bursts coming from the inner and outer cylinder affect the flow profiles. These results exemplify how curvature affects flow in strongly turbulent Taylor-Couette Flow
Phase diagram of turbulent Taylor-Couette flow
No full textWe will present the results of our recent numerical work on the nature of the phase diagram of turbulent Taylor-Couette (TC) flow, both with co- and counterrotating cylinder. The work can be seen as the extension of the famous experimental Andereck et al. phase diagram for Taylor-Couette flow just above the onset of instabilities, towards the ultimate turbulence regime, and now obtained numerically. In particular, we will understand when and why optimal transport of angular velocity from the inner to the outer cylinder is achieved and how this is connected to the angular velocity profile and the structures in the flow
Recommended from our members
The Spectrally Resolved Lyman-Alpha Emission Of Three Lyman-Alpha-Selected Field Galaxies At Z Similar To 2.4 From The HETDEX Pilot Survey
No full textWe present new results on the spectrally resolved Ly alpha emission of three Ly alpha-emitting field galaxies at z similar to 2.4 with high Lya equivalent width (> 100 angstrom) and Lya luminosity (similar to 10(43) erg s(-1)). At 120 km s(-1) (FWHM) spectral resolution, the prominent double-peaked Lya profile straddles the systemic velocity, where the velocity zero point is determined from spectroscopy of the galaxies' rest-frame optical nebular emission lines. The average velocity offset from systemic of the stronger redshifted emission component for our sample is 176 km s(-1) while the average total separation between the redshifted and main blueshifted emission components is 380 km s(-1). These measurements are a factor of similar to 2 smaller than for UV-continuum-selected galaxies that show Lya in emission with lower Lya equivalent widths. We compare our Lya spectra to the predicted line profiles of a spherical "expanding shell" Ly alpha radiative transfer grid that models large-scale galaxy outflows. Specifically, blueward of the systemic velocity where two galaxies show a weak, highly blueshifted (by similar to 1000 km s(-1)) tertiary emission peak, the model line profiles are a relatively poor representation of the observed spectra. Since the neutral gas column density has a dominant influence over the shape of the Lya line profile, we caution against equating the observed Lya velocity offset with a physical outflow velocity, especially at lower spectral resolution where the unresolved Lya velocity offset is a convoluted function of several degenerate parameters. Referring to rest-frame ultraviolet and optical Hubble Space Telescope imaging, we find that galaxy-galaxy interactions may play an important role in inducing a starburst that results in copious Lya emission as well as perturbing the gas distribution and velocity field, both of which have strong influence over the Lya emission line profile.National Science Foundation AST-0926815Texas Norman Hackerman Advanced Research Program 003658-0295-2007Astronom
Experimental study of surface modification in a fully turbulent Taylor-Couette flow
No full textFriction measurements were performed in a Taylor-Couette setup. Drag reduction was obtained with a riblet surface and indicated a drag reduction for a wide range of shear Reynolds numbers, with a maximum of 5.3% at Re_s=47000 (s+=14). Tomographic PIV verified that the friction coefficients are strongly related to the flow regimes and structures. The bulk fluid rotation was changed by the application of the riblets, as the wall-bounded flow conditions at the inner cylinder wall were changed due to the surface modification and is called the rotation effect. A simple model was used to indicate the averaged bulk velocity shift (1.4%), after which the drag changes due to the rotation effect (-1.9%) and the riblet effect (-3.4%) were determined. The bulk velocity shift of 1.4% was verified by PIV measurements. Compliant surfaces will be further investigated to check their required conditions for drag reduction of wall-bounded flow
The Echo: November 20, 1929
No full textWelcome, Convention Delegates
Mr. T.H. Maytag Visits Taylor Campus – Sgt. York Relates War-Time Tests of Loyalty To Christ – Prof. Bush Addresses Prayer Band on Peace – Gumption, Grit, Grace Topic Of Rev. Powell – Three-Day Program Of Gospel League General Convention – Taylor Is Host Of Rev. S. B. Shaw Noted Author-Evangelist – Large Delegation Of Y. P. G. L. Members Due At Convention – Prof. Furbay Selected To Give “Y” Lectures – New Thalos Pilot Dirigible 1929 On Visit To Planets – Donor of Gym Fund Greeted By Students At Parlor Reception – “The Rock” Presented By Dramatic Club November 25:26 – Editorial – Y. P. G. L. Convention – Extra! Extra! – Ink Bubbles – Dear Folks at Home: -- Something Different – Echo Echoes – Missionary Speaks On Customs Of Burmese – Mr. Fiddler of Roj Nadgoon Addresses Volunteers – Woman Evangels Urged To Live Christian Life – Dr. Chappell Organizes Student Science Club – Chatterbox – Strong-hearted Maidens Oppose Intercollegiate Athletics – Inquiring Reporter – Ginger Snaps – Proverbs Undergoing Changes – Sophomores Triumph Over Freshmen – Krinks and Kracks – Junior Men Defeat Seniors 22-16https://pillars.taylor.edu/echo-1929-1930/1009/thumbnail.jp
Experimental investigation of Taylor-Couette flow with radius ratio 0.1 to 0.3
No full textTurbulent flow of a very wide Taylor Couette flow (radius ratio 0.1 up to 0.3) is the scope of the present work. Flow visualisation shows the existing coherent structures. Laser Doppler Velocimetry is used to analyse the local velocity behaviour and understand the flow in this geometry
Torque measurements and flowvisualisations in a wide gap Taylor-Couette flow
No full textThe Torque acting on the inner cylinder in a differentially rotating Taylor-Couette flow is investigated. In the past a torque maximum has been found in the counter rotating regime. Using flow visualisations and LDA measurements a deeper look inside the flow in the vicinity of this maximum will be done
Bulk statistics of stable and decaying Taylor-Couette turbulence
No full textIn this talk we focus on the velocity fluctuations in highly turbulent Taylor-Couette flow for the case of stable flow (constant rotation) and for decaying flow. Turbulent flows are generally characterized by the range of scales of their fluctuations, and a statistical description of the flow is often done by calculating the correlations of velocity fluctuations. These correlations are found to behave like power-laws over a range of scales, and their exponents characterize a certain geometry of flow. Many systems have been investigated carefully: Pipe-flow, Von Kármán flow, Rayleigh Bénard convection, \textit{et cetera}. There are, however, few reports \cite{lew99,she01} quantifying the turbulent properties in Taylor-Couette flow. In the presented work \cite{huisman2013b} we measure the longitudinal structure functions using laser Doppler anemometry, which is a non-intrusive technique and is able to measure the components of the velocity, and thus ideal for obtaining structure functions and the local velocity. We present the statistics of the turbulent velocity fluctuations for counter rotation for varying
Founders: Christopher Taylor
No full text\ua9 2021 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. ‘Founders’ is an intermittent series of short, critical appreciations of scholars, researchers and others whose work and ideas, mainly in Britain, have made particularly sweeping, influential and foundational contributions to the development of historically- and archaeologically-informed landscape studies. This latest addition to the series concerns Christopher Taylor, whose death on 28th May 2021 was noted in the Landscapes editorial in issue 21.2
- …
