Results 21 to 30 of about 102,240 (259)
Population Dynamics At High Reynolds Number [PDF]
Physical Review Letters, 2010 We study the statistical properties of population dynamics evolving in a realistic two-dimensional compressible turbulent velocity field. We show that the interplay between turbulent dynamics and population growth and saturation leads to quasi-localization and a remarkable reduction in the carrying capacity. The statistical properties of the population
Perlekar, P +3 more
openaire +6 more sources
Design of a control system for a 1.5 m diameter coaxial rigid rotor model
Hangkong gongcheng jinzhanAs a key equipment for rotor wind tunnel testing, the design specifications and control accuracy of the rotor test bench directly determine the testing accuracy and effectiveness of the rotor wind tunnel testing.
LIU Shi, SHAO Tianshuang, LIU Xiangnan
doaj +1 more source
Low Reynolds Number Rotor Blade Aerodynamic Analysis
MATEC Web of Conferences, 2019 Maintaining a steady hover flight in a rotorcraft usually requires high energy input. The aim of the paper is to prove that it is possible to vastly reduce energy use in a rotorcraft by reducing the disc loading.
Tulwin Tytus
doaj +1 more source
Stochastic low Reynolds number swimmers [PDF]
Journal of Physics: Condensed Matter, 2009 As technological advances allow us to fabricate smaller autonomous self-propelled devices, it is clear that at some point directed propulsion could not come from pre-specified deterministic periodic deformation of the swimmer's body and we need to develop strategies to extract a net directed motion from a series of random transitions in the ...
Golestanian, R., Ajdari, A.
openaire +6 more sources
Rotor blade design and dynamic characteristics analysis of unmanned helicopter
Hangkong gongcheng jinzhanThe widespread application of composite materials in blades also makes the force and stiffness characteristics of blades more complex than traditional blades.
GAO Hongbo
doaj +1 more source
Is the critical Reynolds number universal?
Journal of Experimental and Theoretical Physics, 2002 7 pages, 4 ...
Novopashin, Sergey, Muriel, Amador
openaire +2 more sources
Numerical Validation of a Multi-Dimensional Similarity Law for Scaled STOVL Aircraft Models
AerospaceThe complex jet-ground interactions of Short Take-off and Vertical Landing (STOVL) aircraft are critical to flight safety and performance, yet studying them with traditional full-scale wind tunnel tests is prohibitively expensive and time-consuming ...
Shengguan Xu +7 more
doaj +1 more source
Optimal Swimming at Low Reynolds Numbers [PDF]
Physical Review Letters, 2004 Efficient swimming at low Reynolds numbers is a major concern of microbots. To compare the efficiencies of different swimmers we introduce the notion of ``swimming drag coefficient'' which allows for the ranking of swimmers. We find the optimal swimmer within a certain class of two dimensional swimmers using conformal mappings techniques.
Avron, J. E., Gat, O., Kenneth, O.
openaire +3 more sources
AerospaceSupercritical wings are widely used in large aircraft due to their excellent transonic performance, but their aerodynamic characteristics are highly sensitive to Reynolds number. To systematically study the influence of Reynolds number on the aerodynamic
Baobin Hou +5 more
doaj +1 more source
Optimal Strokes of Low Reynolds Number Linked-Sphere Swimmers
Applied Sciences, 2019 Optimal gait design is important for micro-organisms and micro-robots that propel themselves in a fluid environment in the absence of external force or torque.
Qixuan Wang
doaj +1 more source