Results 81 to 90 of about 13,475 (217)

Multiscale modeling of rapid granular flow with a hybrid discrete-continuum method

, 2015
Both discrete and continuum models have been widely used to study rapid granular flow, discrete model is accurate but computationally expensive, whereas continuum model is computationally efficient but its accuracy is doubtful in many situations. Here we
Chen, Xizhong, Li, Jinghai, Wang, Junwu
core   +1 more source

The non-uniformity characteristics of the evaporation duct in the South China Sea based on CLDAS data

Frontiers in Marine Science
The non-uniformity of the evaporation duct has a significant impact on the propagation of electromagnetic waves. Based on the near real-time dataset from the China Meteorological Administration Land Data Assimilation System (CLDAS) and the National ...
Ning Yang, Xiaohai Zou, Luyao Sun, Debin Su, Debin Su, Tao Wang   +5 more
doaj   +1 more source

TNT07 MIO San Francisco Bay, atmospheric effects after action report [PDF]

, 2007
The authors participated in four Tactical Network Topology Marine Interdiction Operations (TNT MIOs) during FY 2007. The overall goals of the authors TNT MIO studies were (1) to provide military and law enforcement personnel with real time and future ...
Davidson, Kenneth, Guest, Peter, Jordan, Mary, Lind, Richard   +3 more
core  

Ray Tracing and Applications to an Evaporation Duct Model Based on Data from Oceanographic Buoy Sensors

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
The two-dimensional ray tracing method allows an easy and fast modeling of tropospheric propagation in the microwave frequency range. A version of this method that determines ray trajectories, amplitudes and delays of the electromagnetic field, as well ...
Leonardo L. Freitas, Emanoel Costa
doaj   +1 more source

Acoustic Attenuation in Fans and Ducts by Vaporization of Liquid Droplets [PDF]

, 1975
A cloud of small water droplets in saturated air attenuates acoustic disturbances by viscous drag, heat transfer, and vapor exchange with the ambient gas. The viscous and heat transfer phenomena attenuate at frequencies above 104 Hz for I-J.l droplets.
Candel, Sebastien M., Marble, Frank E.
core  

A mathematical model for jet engine combustor pollutant emissions [PDF]

Mathematical modeling for the description of the origin and disposition of combustion-generated pollutants in gas turbines is presented. A unified model in modular form is proposed which includes kinetics, recirculation, turbulent mixing, multiphase flow
Boccio, J. L., Edelman, R. B., Weilerstein, G.   +2 more
core   +1 more source

Estimating Evaporation Duct Height by Kite Flying Rawinsonde

, 2006
OC3570 ...
openaire   +1 more source

Centaur Propellant Thermal Conditioning Study [PDF]

A wicking investigation revealed that passive thermal conditioning was feasible and provided considerable weight advantage over active systems using throttled vent fluid in a Centaur D-1s launch vehicle.
Blatt, M. H., Erickson, R. C., Pleasant, R. L.   +2 more
core   +1 more source

Continuous observation of evaporation ducts in Super Typhoon Koinu (202314) using clustered wave gliders: mechanisms and maritime communication implications

Frontiers in Marine Science
Formed by humidity stratification in the marine atmospheric boundary layer, evaporation ducts serve as critical natural channels for maritime over-the-horizon (OTH) wireless communication.
Shuwen Wang, Shuwen Wang, Shuwen Wang, Zikang Zhang, Zikang Zhang, Zikang Zhang, Yang Shi, Yang Shi, Yang Shi, Xiujun Sun, Ying Zhou, Yihang Shu, Yihang Shu, Yihang Shu, Fan Yang, Fan Yang, Hongzhe Zhu, Kunde Yang, Kunde Yang, Kunde Yang   +19 more
doaj   +1 more source

Aerial applications dispersal systems control requirements study [PDF]

Performance deficiencies in aerial liquid and dry dispersal systems are identified. Five control system concepts are explored: (1) end of field on/off control; (2) manual control of particle size and application rate from the aircraft; (3) manual control
Bauchspies, J. S., Cleary, W. L., Rogers, W. F., Sanders, G. S., Simpson, W.   +4 more
core   +1 more source