Results 41 to 50 of about 56,758 (188)
Multi-fidelity modelling of shark skin denticle flows: insights into drag generation mechanisms
Royal Society Open Science, 2023 We investigate the flow over smooth (non-ribletted) shark skin denticles in an open-channel flow using direct numerical simulation (DNS) and two Reynolds averaged Navier–Stokes (RANS) closures. Large peaks in pressure and viscous drag are observed at the
C. J. Lloyd +6 more
doaj +1 more source
Trapping of giant-planet cores - I. Vortex aided trapping at the outer dead zone edge [PDF]
, 2013 In this paper the migration of a 10 Earth-mass planetary core is investigated at the outer boundary of the dead zone of a protoplanetary disc by means of 2D hydrodynamic simulations done with the graphics processor unit version of the FARGO code.
Ataiee, S. +3 more
core +2 more sources
Horseshoe drag in three-dimensional globally isothermal disks [PDF]
, 2016 We study the horseshoe dynamics of a low-mass planet in a three-dimensional, globally isothermal, inviscid disk. We find, as reported in previous work, that the boundaries of the horseshoe region (separatrix sheets) have cylindrical symmetry about the ...
Benítez Llambay, Pablo, Masset, F. S.
core +1 more source
An estimation method of full scale performance for pulling type podded propellers
International Journal of Naval Architecture and Ocean Engineering, 2014 : This paper presents a new estimation method of full scale propulsive performance for the pulling type podded propeller. In order to estimate the drag of pod housing, a drag velocity ratio, which includes the effects of podded propeller loading and ...
Hyoung-Gil Park +2 more
doaj +3 more sources
Tuning the torque-speed characteristics of bacterial flagellar motor to enhance the swimming speed
, 2019 In a classic paper, Edward Purcell analysed the dynamics of flagellated bacterial swimmers and derived a geometrical relationship which optimizes the propulsion efficiency. Experimental measurements for wild-type bacterial species E.
Abdulla, Amith Z. +3 more
core +1 more source
BINARIES TRAVELING THROUGH A GASEOUS MEDIUM: DYNAMICAL DRAG FORCES AND INTERNAL TORQUES [PDF]
The Astrophysical Journal, 2014 Using time-dependent linear theory, we investigate the morphology of the gravitational wake induced by a binary, whose center of mass moves at velocity Vcm against a uniform background of gas. For simplicity, we assume that the binary's components are on circular orbits about their common center of mass.
F. J. Sánchez-Salcedo, Raul O. Chametla
openaire +2 more sources
Study on the Drag Torque Characteristic of Underground Unmanned Vehicle Wet Brake System
Jixie chuandong, 2015 In view of the problem of the braking effectiveness obvious fluctuation,poor system stability of traditional underground transport vehicle,the wet brake is introduced to the traditional underground unmanned vehicle braking system,the calculation and ...
Zhou Lihong
doaj
A CFD-informed quasi-steady model of flapping-wing aerodynamics [PDF]
, 2015 Aerodynamic performance and agility during flapping flight are determined by the combination of wing shape and kinematics. The degree of morphological and kinematic optimization is unknown and depends upon a large parameter space.
Bomphrey, R J, Liu, H, Nakata, T
core +3 more sources
Improvement of Torque-and-Drag Modeling in Long-Reach Wells
Modern Applied Science, 2011 Torque and drag modeling is regarded as an invaluable process to assist in well planning and to predict and prevent drilling problems. It discusses how to use torque and drag calculations and measurements to plan long-reach well profiles, to execute drilling operations that minimize torque and drag effects and to monitor hole cleaning.
Seyed Ahmad Mirhaj +2 more
openaire +2 more sources
Viscous Dynamics of Lyme Disease and Syphilis Spirochetes Reveal Flagellar Torque and Drag [PDF]
Biophysical Journal, 2013 The spirochetes that cause Lyme disease (Borrelia burgdorferi) and syphilis (Treponema pallidum) swim through viscous fluids, such as blood and interstitial fluid, by undulating their bodies as traveling, planar waves. These undulations are driven by rotation of the flagella within the periplasmic space, the narrow (∼20-40 nm in width) compartment ...
Harman, Michael +3 more
openaire +2 more sources