Zobrazeno 1 - 10
of 81
pro vyhledávání: '"Roi Gurka"'
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-14 (2023)
Abstract Waterfowl use webbed feet to swim underwater. It has been suggested that the triangular shape of the webbed foot functions as a lift-generating delta wing rather than a drag-generating oar. To test this idea, we studied the hydrodynamic char
Externí odkaz:
https://doaj.org/article/571199599eab43dc83e0db8a01ce0441
Publikováno v:
Frontiers in Marine Science, Vol 9 (2022)
The Reynolds number, which describes the relative importance of viscous and inertial contributions is commonly used to analyze forces on fish and other aquatic animals. However, this number is based on steady, time-independent conditions, while all s
Externí odkaz:
https://doaj.org/article/0e06f7b44a2640d0845fe8183f82b416
Publikováno v:
Royal Society Open Science, Vol 8, Iss 7 (2021)
Rotor blades can be found in many engineering applications, mainly associated with converting energy from fluids to work (or electricity). Rotor blade geometry is a key factor in the mechanical efficiency of the energy conversion process. For example
Externí odkaz:
https://doaj.org/article/999f488cb0e64c5b8b95528994cbb06a
Publikováno v:
MethodsX, Vol 8, Iss , Pp 101529- (2021)
Olfactory navigation is defined as a task of a self-propelled navigator with some sensors capabilities to detect odor (or scalar concentration) convected and diffused in a windy environment. Known for their expertise in locating an odor source, male
Externí odkaz:
https://doaj.org/article/7c34224a1c8c40e3a82017b6b0141dd0
Publikováno v:
SoftwareX, Vol 12, Iss , Pp 100585- (2020)
We present an open-source MATLAB package, entitled OpenPIV-MATLAB, for analyzing particle image velocimetry (PIV) data. We extend the PIV analysis with additional tools for post-processing the PIV results including the estimation of aero/hydrodynamic
Externí odkaz:
https://doaj.org/article/ee4acb06f34f4604914bee504f9382e7
Publikováno v:
Royal Society Open Science, Vol 6, Iss 7 (2019)
Micro air vehicles are used in a myriad of applications, such as transportation and surveying. Their performance can be improved through the study of wing designs and lift generation techniques including leading-edge vortices (LEVs). Observation of n
Externí odkaz:
https://doaj.org/article/73a0c4126b2c4835b3c5385d159477b0
Publikováno v:
PLoS ONE, Vol 13, Iss 6, p e0198422 (2018)
Some female moths attract male moths by emitting series of pulses of pheromone filaments propagating downwind. The turbulent nature of the wind creates a complex flow environment, and causes the filaments to propagate in the form of patches with vary
Externí odkaz:
https://doaj.org/article/4f0d74585a394d6a9fa78c95fce00358
Autor:
Corrine N Jacobs, Wilmot Merchant, Marek Jendrassak, Varavut Limpasuvan, Roi Gurka, Erin E Hackett
Publikováno v:
PLoS ONE, Vol 11, Iss 8, p e0159645 (2016)
The settling velocities of natural, synthetic, and industrial particles were measured in a grid turbulence facility using optical measurement techniques. Particle image velocimetry and 2D particle tracking were used to measure the instantaneous veloc
Externí odkaz:
https://doaj.org/article/1cc288f8f3ef4c0697427265c88ce7a1
Autor:
Oksana Stalnov, Hadar Ben-Gida, Adam J Kirchhefer, Christopher G Guglielmo, Gregory A Kopp, Alexander Liberzon, Roi Gurka
Publikováno v:
PLoS ONE, Vol 10, Iss 9, p e0134582 (2015)
We study the role of unsteady lift in the context of flapping wing bird flight. Both aerodynamicists and biologists have attempted to address this subject, yet it seems that the contribution of unsteady lift still holds many open questions. The curre
Externí odkaz:
https://doaj.org/article/b6d1c533d3724b4899c11c86bb67f3f5
Autor:
Hadar Ben-Gida, Adam Kirchhefer, Zachary J Taylor, Wayne Bezner-Kerr, Christopher G Guglielmo, Gregory A Kopp, Roi Gurka
Publikováno v:
PLoS ONE, Vol 8, Iss 11, p e80086 (2013)
Wing flapping is one of the most widespread propulsion methods found in nature; however, the current understanding of the aerodynamics in bird wakes is incomplete. The role of the unsteady motion in the flow and its contribution to the aerodynamics i
Externí odkaz:
https://doaj.org/article/4925655d97694ce2b27d2adcfa89a958