Experimental study of a hybrid ferrohydrodynamics instability in miscible ferrofluids: droplet size effects

2009 ◽  
Vol 45 (1) ◽  
pp. 3-14 ◽  
Keyword(s):  
Experimental Study ◽  
Droplet Size ◽  
Size Effects

scholarly journals Droplet Size Effects on NOx Formation in a One-Dimensional Monodisperse Spray Combustion System

1982 ◽  
Author(s):  
H. Sarv ◽  
A. A. Nizami ◽  
N. P. Cernansky
Keyword(s):  
Physical Properties ◽  
Droplet Size ◽  
Size Effects ◽  
Theoretical Calculations ◽  
Spray Combustion ◽  
Nox Emissions ◽  
Combustion System ◽  
Nox Formation ◽  
One Dimensional ◽  
Aerosol Spray

A one-dimensional monodisperse aerosol spray combustion facility is described and experimental results of post flame NO/NOx emissions are presented. Four different hydrocarbon fuels were studied: isopropanol, methanol, n-heptane, and n-octane. The results indicate an optimum droplet size in the range of 48–58 microns for minimizing NO/NOx production for all of the test fuels. This NOx behavior is associated with droplet interactions and the transition from diffusive type of spray burning to that of a prevaporized and premixed case. Decreasing the droplet size results in a trend of increasing droplet interactions, which suppresses temperatures and reduces NOx. This trend continues until prevaporization effects begin to dominate and the system tends towards the premixed limit. The occurrence of the minimun NOx point at different droplet diameters for the different fuels appears to be governed by the extent of prevaporization of the fuel in the spray, and is consistent with theoretical calculations based on each fuel’s physical properties.

scholarly journals Turbulent Transport of Material Particles: An Experimental Study of Finite Size Effects

2007 ◽  
Vol 99 (18) ◽  
Author(s):  
Nauman M. Qureshi ◽  
Mickaël Bourgoin ◽  
Christophe Baudet ◽  
Alain Cartellier ◽  
Yves Gagne
Keyword(s):  
Experimental Study ◽  
Size Effects ◽  
Turbulent Transport ◽  
Finite Size ◽  
Finite Size Effects

Spray nozzles and droplet size effects on soybean canopy deposits and stink bugs control in west region of São Paulo state - Brazil

2020 ◽  
Vol 48 (2) ◽  
pp. 203-213
Author(s):  
Matheus A. G. L. Farias ◽  
Carlos G. Raetano ◽  
Rodolfo G. Chechetto ◽  
Pedro J. Ferreira-Filho ◽  
Júlio C. Guerreiro ◽  
...  
Keyword(s):  
Droplet Size ◽  
Size Effects ◽  
Sao Paulo ◽  
São Paulo ◽  
Stink Bugs ◽  
Paulo State ◽  
West Region ◽  
São Paulo State ◽  
Soybean Canopy

Experimental Study of Leidenfrost Phenomena at Hot Sprayed Surface

2003 ◽  
Author(s):  
M. Raudensky´ ◽  
J. Horsky´ ◽  
V. Dumek ◽  
P. Kotrba´cˇek
Keyword(s):  
Experimental Study ◽  
Droplet Size ◽  
Impinging Jets ◽  
Spray Parameters ◽  
Surface Cooling ◽  
Two Phase ◽  
Coefficient Distribution ◽  
Flow Experiment ◽  
Leidenfrost Temperature ◽  
The Relationship

An experimental study was prepared to find the relationship between Leidenfrost temperature and droplet size and velocity of impinging jets. The study is done for the case of steel surface cooling with two-phase nozzles. The sprayed surface moves under the spray at a velocity of 1 m/min. Cooling experiments were done for initial temperature of 1250°C. Thermal experiments are transient: internal temperature is measured and surface temperature and heat transfer coefficient distribution is computed by the inverse task. Droplet size and velocity of the impinging jet was modified by setting water and air pressures at the input of the nozzle. Spray parameters for each pressure combination was measured using a laser-doppler anemometer. The paper shows the results of the thermal and fluid flow experiment and the correlation between Leidenfrost temperature and flow parameters.The application of obtained results is expected for high temperature cooling especially in continuous casting.

An Experimental Study of the Influence of Size Effect on Springback of Micro Sheet Forming

2006 ◽  
Author(s):  
Jenn-Terng Gau ◽  
Chris Principe ◽  
Fengchen Yang
Keyword(s):  
Experimental Study ◽  
Size Effects ◽  
Low Cost ◽  
Thin Sheet ◽  
Sheet Forming ◽  
Three Point Bending ◽  
Key Factor ◽  
Thin Sheet Metal ◽  
Springback Behavior ◽  
Grain Diameter

An efficient and low cost experiment was conducted to investigate the influence of grain size effects on springback of thin sheet metal. A three-point bending setup was used to test Aluminum 1100 O-Temper and Brass 26000 1/2 Hard (H02). Thickness and average grain diameter were controlled to achieve a range of desired T/D (thickness/grain diameter) ratios because T/D ratio is a key factor that influences the springback behavior in micro sheet forming. The results from this experiment show that as T/D ratio becomes smaller (T/D > 1 → 1) the springback amount increases at a decreasing slope. And as T/D continues to become even smaller (T/D < 1) the springback amount begins to decrease. These behaviors demonstrate the influence of size effects on springback.

An experimental study on oil droplet size distribution in subsurface oil releases

2018 ◽  
Vol 37 (11) ◽  
pp. 88-95 ◽  
Author(s):  
Jianwei Li ◽  
Wei An ◽  
Huiwang Gao ◽  
Yupeng Zhao ◽  
Yonggen Sun
Keyword(s):  
Experimental Study ◽  
Size Distribution ◽  
Droplet Size ◽  
Droplet Size Distribution ◽  
Oil Droplet ◽  
Oil Droplet Size
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