Results 21 to 30 of about 733,937 (338)
Bubbly Turbulent Drag Reduction Is a Boundary Layer Effect [PDF]
, 2007 In turbulent Taylor-Couette flow, the injection of bubbles reduces the overall drag. On the other hand, rough walls enhance the overall drag. In this work, we inject bubbles into turbulent Taylor-Couette flow with rough walls (with a Reynolds number up ...
Berg, Thomas H. van den +3 more
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Exceeding the asymptotic limit of polymer drag reduction [PDF]
, 2017 The drag of turbulent flows can be drastically decreased by addition of small amounts of high molecular weight polymers. While drag reduction initially increases with polymer concentration, it eventually saturates to what is known as the maximum drag ...
Choueiri, George H. +2 more
core +3 more sources
Streamwise-traveling waves of spanwise wall velocity for turbulent drag reduction [PDF]
, 2009 Waves of spanwise velocity imposed at the walls of a plane turbulent channel flow are studied by Direct Numerical Simulations. We consider sinusoidal waves of spanwise velocity which vary in time and are modulated in space along the streamwise direction.
Quadrio, M., Ricco, P., Viotti, C.
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Spacecraft rendezvous by differential drag under uncertainties [PDF]
, 2016 At low Earth orbits, differentials in the drag forces between spacecraft can be used for controlling their relative motion in the orbital plane. Current methods for determining the drag force may result in errors due to inaccuracies in the density models
Bevilacqua, Riccardo +3 more
core +1 more source
Acta Universitatis Lodziensis. Folia Litteraria Polonica, 2018 The article focuses on the intercultural meeting between Poles and Ukrainians in the television series. The series Girls from Lviv was created by Poles and presents stories of Ukrainian migrating to Warsaw for economic reasons.
Katarzyna Drąg
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The Goldsmiths Prize and Its Conceptualization of Experimental Literature [PDF]
Polish Journal of English Studies, 2019 In the aftermath of a critical debate regarding the Man Booker Prize’s adoption of ‘readability’ as the main criterion of literary value, Goldsmiths College established a new literary prize. The Goldsmiths Prize was launched in 2013
Wojciech Drąg
doaj
NARMAX Identification Based Closed-Loop Control of Flow Separation over NACA 0015 Airfoil
Fluids, 2020 A closed-loop control algorithm for the reduction of turbulent flow separation over NACA 0015 airfoil equipped with leading-edge synthetic jet actuators (SJAs) is presented.
Sohaib Obeid +2 more
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Hydrodynamic Performance of Full-Scale T0 and T90 Codends with and without a Codend Cover
Journal of Marine Science and Engineering, 2022 The hydrodynamic performance of one full-scale T0 (mesh size 90 mm) and three T90 (mesh size 90, 100, and 110 mm) codends was investigated and compared using flume tank testing, with and without a small-mesh cover.
Zhaohai Cheng +3 more
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Coulomb drag in the mesoscopic regime
, 2001 We present a theory for Coulomb drag between two mesoscopic systems which expresses the drag in terms of scattering matrices and wave functions. The formalism can be applied to both ballistic and disordered systems and the consequences can be studied ...
Antti-Pekka Jauho +3 more
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Flow Visualization of Spinning and Nonspinning Soccer Balls Using Computational Fluid Dynamics
Applied Sciences, 2020 Various studies have been conducted on the aerodynamic characteristics of nonspinning and spinning soccer balls. However, the vortex structures in the wake of the balls are almost unknown. One of the main computational fluid dynamics methods used for the
Takeshi Asai +3 more
doaj +1 more source