Results 41 to 50 of about 142,074 (316)

A mathematical model for a wake.

Michigan Mathematical Journal, 1984
A free boundary problem for a wake around an obstacle in a two dimensional incompressible, inviscid fluid flow has been considered. Sufficient conditions for the existence of wakes in doubly and simply connected starlike regions have been formulated.
openaire   +3 more sources

The vortex wake of a ‘hovering’ model hawkmoth

Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences, 1997
Visualization experiments with Manduca sexta have revealed the presence of a leading–edge vortex and a highly three–dimensional flow pattern. To further investigate this important discovery, a scaled–up robotic insect was built (the ‘flapper’) which could mimic the complex movements of the wings of a hovering ...
van den Berg, C., Ellington, C.P.
openaire   +3 more sources

Aircraft Wake-Vortex Evolution in Ground Proximity: Analysis and Parameterization

, 2006
Field measurement data of 282 wake vortex pairs and respective environmental conditions acquired at Frankfurt Airport by means of lidar, Sodar/RASS, and ultrasonic anemometer are used to analyze wake vortex behavior in ground proximity. Exceptional cases
Steen, Meiko, Frank Holzäpfel, Meiko Steen, Holzäpfel, Frank   +3 more
core   +1 more source

A physical wind‐turbine wake growth model under different stratified atmospheric conditions

Wind Energy, 2022
The wind‐turbine wake growth is crucial for wake assessment. At present, it can only be determined empirically, which is the primary source of prediction errors in the analytical wake model, and a physically‐based method is urgently needed. Recently, the
Bowen Du, Mingwei Ge, Yongqian Liu
doaj   +1 more source

On the Wind Turbine Wake Mathematical Modelling

Energy Procedia, 2018
Abstract The present paper deals with a study on the wind turbine wake mathematical modelling as well as experimental validation by means of wind tunnel experiments. In particular, different wind turbine wake’s equations were implemented and results compared with experimental data.
S. BRUSCA, R. LANZAFAME, F. FAMOSO, A. GALVAGNO, M. MESSINA, S. MAURO, M. PRESTIPINO   +6 more
openaire   +2 more sources

Modification of three-dimensional transition in the wake of a rotationally oscillating cylinder [PDF]

, 2010
A study of the flow past an oscillatory rotating cylinder has been conducted, where the frequency of oscillation has been matched to the natural frequency of the vortex street generated in the wake of a stationary cylinder, at Reynolds number 300.
Leontini, Justin S., Justin S. Leontini, Mark C. Thompson, Lo Jacono, David, Thompson, Mark C., John Sheridan, David Lo Jacono, Sheridan, John   +7 more
core   +1 more source

A New Study on the Effect of the Partial Wake Generated in a Wind Farm

Energies
In this article, we present an investigative study on the often-overlooked partial wake phenomenon in previous studies concerning wind farm configurations. A partial wake occurs when a portion of the actuator disk of a downstream wind turbine is affected
Said Zergane, Chouki Farsi, Salah Amroune, Souad Benkherbache, Noureddine Menasri   +4 more
doaj   +1 more source

Hijacking emergency granulopoiesis: Neutrophil ontogeny and reprogramming in cancer

Molecular Oncology, EarlyView.
Neutrophils are highly plastic innate immune cells; their functions in cancer extend beyond the tumour microenvironment. This Review summarises current understanding of neutrophil maturation and heterogeneity and highlights tumour‐induced granulopoiesis as a systemic programme that expands immature, immunosuppressive neutrophils via tumour‐derived ...
Gabriela Marinescu, Yi Feng
wiley   +1 more source

Aircraft Wake Recognition Based on Improved ParNet Convolutional Neural Network

Applied Sciences, 2023
The occurrence of wake can pose a threat to the flight safety of aircraft and affect the runway capacity and airport operation efficiency. To effectively identify aircraft wake, this paper proposes a novel convolutional neural network (CNN) method of ...
Yuzhao Ma, Jiangbei Zhao, Haoran Han, Pak-wai Chan, Xinglong Xiong   +4 more
doaj   +1 more source

Metastasis on pause: How dormant tumor cells stay hidden within the tumor microenvironment and evade immune surveillance

Molecular Oncology, EarlyView.
Dormant cancer cells can hide in distant organs for years, evading treatment and the immune system. This review highlights how signals from the surrounding tissue and immune environment keep these cells inactive or trigger their reawakening. Understanding these mechanisms may help develop therapies to eliminate or control dormant cells and prevent ...
Kanishka Tiwary, Jose Javier Bravo‐Cordero   +1 more
wiley   +1 more source