Experimental Characterization of Aerosol Production, Transport, Vaporization, and Atomization Systems. Part II: Factors Controlling Aerosol Size Distributions Produced

1985 ◽  
Vol 39 (6) ◽  
pp. 920-925 ◽  
Author(s):  
R. K. Skogerboe ◽  
S. J. Freeland
Keyword(s):  
Flow Rate ◽  
Gas Flow ◽  
Cross Flow ◽  
Size Distributions ◽  
Experimental Characterization ◽  
Gas Flow Rate ◽  
Mean Size ◽  
The Mean ◽  
Model Equations

The effects of nebulization conditions on the size characteristics of the aqueous aerosol produced have been investigated for a cross-flow nebulizer. It is shown that the nebulizer gas flow rate does not affect the upper limit mean sizes of the aqueous droplets transported from the nebulization chamber but that the mean size of the analyte-containing aerosol itself is affected. Model equations are presented descriptive of the effects of gas flow rate and analyte concentrations on analyte aerosol size characteristics.

Experimental Characterization of Aerosol Production, Transport, Vaporization, and Atomization Systems. Part I: Factors Controlling Aspiration Rates

1985 ◽  
Vol 39 (6) ◽  
pp. 916-920 ◽  
Author(s):  
R. K. Skogerboe ◽  
S. J. Freeland
Keyword(s):  
Pressure Drop ◽  
Flow Rate ◽  
Gas Flow ◽  
Present Knowledge ◽  
Experimental Characterization ◽  
Gas Flow Rate ◽  
Factors Affecting ◽  
Simple Linear Equation ◽  
The Relationship

This paper describes the results of the first stage of an investigation designed to extend present knowledge of the factors affecting aerosol production, transport, vaporization, and atomization in analytical spectroscopy systems. It focuses on factors controlling aspiration of aqueous solutions. The results demonstrate that the effect of gas flow on the pressure drop induced at the tip of the solution draw tube can be described by a simple linear equation; that the relationship between gas flow rate and solution nebulization rate can also be modelled by a simple equation; and that these relationships are not adequately represented by the Hagen-Poiseulle equation, as is often claimed.

Directional Pumping Performance of an Electrostatic Checkerboard Microvalve

2006 ◽  
Author(s):  
Hanseup Kim ◽  
Aaron A. Astle ◽  
Luis P. Bernal ◽  
Khalil Najafi ◽  
Peter D. Washabaugh
Keyword(s):  
Flow Rate ◽  
Gas Flow ◽  
Maximum Flow ◽  
Pressure Differential ◽  
Oscillatory Motion ◽  
Sinusoidal Signal ◽  
Maximum Pressure ◽  
Experimental Characterization ◽  
Gas Pumping

This paper reports experimental characterization of directional gas pumping generated by MEMS-fabricated checkerboard-type electrostatic microvalves. It is found that the oscillatory motion of the checkerboard microvalve membrane provides both the pumping and valve functions of a pump, namely: 1) to cause the volume displacement and, thus, compression and transfer of gas, and 2) to direct gas flow in one direction by closing and opening air paths in the proper sequence. Here, we describe the microvalve-only design, and report the pumping performance producing a maximum flow rate of 1.8 sccm and a maximum pressure differential of 3.0 kPa for five microvalves driven simultaneously with a sinusoidal signal of ± 100V amplitude at 5.5 kHz.

A Characterization of the Performance of Gas Sensor Based on Heater in Different Gas Flow Rate Environments

2020 ◽  
Vol 16 (10) ◽  
pp. 6281-6290
Author(s):  
Linxi Dong ◽  
Zhongren Xu ◽  
Weipeng Xuan ◽  
Haixia Yan ◽  
Chaoran Liu ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Flow Rate ◽  
Gas Flow ◽  
Gas Flow Rate

Characterization of matrix effects using an inductively coupled plasma-sector field mass spectrometer

2020 ◽  
Vol 35 (9) ◽  
pp. 2033-2056 ◽  
Author(s):  
Shi Jiao ◽  
John W. Olesik
Keyword(s):  
Flow Rate ◽  
Inductively Coupled Plasma ◽  
Gas Flow ◽  
Matrix Effects ◽  
Mass Matrix ◽  
Gas Flow Rate ◽  
Field Mass ◽  
Inductively Coupled ◽  
Comprehensive Characterization

Comprehensive characterization of ICP-SFMS matrix effects as function of analyte mass, matrix mass, focus lens voltage and nebulizer gas flow rate.

PEMBUATAN NANOPARTIKEL SENG OKSIDA (ZNO)MENGGUNAKAN PROSES FLAME ASSISTED SPRAY PYROLYSIS (FASP)

EKUILIBIUM ◽  
2014 ◽  
Vol 13 (1) ◽  
Author(s):  
Agus Purwanto
Keyword(s):  
Spray Pyrolysis ◽  
Flow Rate ◽  
Zno Nanoparticles ◽  
Gas Flow ◽  
Point Of View ◽  
Carrier Gas ◽  
Flame Reactor ◽  
Mean Size ◽  
The Mean ◽  
Carrier Gas Flow

<p>Abstract: ZnO nanoparticles have been succesfully produced using Flame Assisted Spray<br />Pyrolysis (FASP) method. Burner type was a premixed flame reactor that used LPG as a fuel<br />and air as oxidizer because of an economical point of view. Zn(NO<br />3<br />)2<br />was used as a precursor<br />source for ZnO nanoparticles production. The flow rates of carrier gas during ZnO nanoparticles<br />fabrication were 5 L/menit, 7 L/menit, and 9 L/menit. To get the information about size and<br />shape of ZnO nanoparticles was characterized using Scanning Electron Microscope (SEM) and<br />X-Ray Diffractometry (XRD). The results showed that the higher carrier gas flow rate, the bigger<br />size of ZnO nanoparticles. By using the flow rate of carrier gas at 5 L/min, the mean size of ZnO<br />nanoparticles was about 80 nm. ZnO nanoparticles at carrier gas of 5 L/min were hexagonal<br />zincite crystalline structure and XRD were about 30,62 nm<br />Keywords: Flame Assisted Spray Pyrolysis, nanoparticles, ZnO, LPG, SEM, XRD</p>

Characterization of 12-Phase AC Arc Discharge and Glass In-Flight Melting Behavior

2012 ◽  
Vol 485 ◽  
pp. 185-188
Author(s):  
Yao Chun Yao ◽  
Takayuki Watanabe ◽  
Kazuyuki Yatsuda
Keyword(s):  
Flow Rate ◽  
Gas Flow ◽  
Arc Discharge ◽  
Melting Behavior ◽  
Raw Material ◽  
Gas Flow Rate ◽  
Discharge Behavior ◽  
Ac Arc ◽  
Ac Arc Discharge

Thermal plasma of 12-phase AC arc was successfully developed and applied in the field of glass in-flight melting, and the arc discharge behavior was characterized by image analysis. The effects of sheath gas flow rate on arc discharge and melting behavior of granulated glass raw material were investigated. Results show that different sheath gas flow rates lead to various arc discharge and high-temperature region. The fluctuation of luminance area ratio and coefficient of variation reflects the change of arc discharge behavior. As the sheath gas flow rate increases, the ratio of luminance area decreases and the center temperature of arc increases. The vitrification degree of glass raw material is mostly dependent on the center temperature of arc, higher center temperature and more vitrification degree.

scholarly journals Characterization of a Dual Chambered Two Phase Separator

2011 ◽  
Author(s):  
Casey Klein ◽  
Cable Kurwitz ◽  
Frederick Best
Keyword(s):  
Flow Rate ◽  
Gas Flow ◽  
Space Shuttle ◽  
Scaling Analysis ◽  
Gas Flow Rate ◽  
Two Phase ◽  
Space Applications ◽  
Higher Power ◽  
Phase Separator

Fuel cells have been used as a power source in the space shuttle for decades and are expected to be used in future higher power, larger systems. A new, passive gas/liquid phase separator for use in such large fuel cell space applications has been invented. It is a vortex separator designed to accommodate gas driven two phase flows. The work presented here is a first of a kind study of this newly invented separator examining the minimum inlet gas flow rate necessary for a stable vortex inside the separator as a function of separator size. A dimensional scaling analysis was done to predict this minimum inlet gas flow rate. Experiments were performed on the ground and in conjunction with the NASA microgravity simulating aircraft to validate modeling. The results of the experiments and scaling analysis are compared.

Liquid entrainment from a wetted wire exposed to a high gas flow rate in cross flow

2010 ◽  
Vol 65 (24) ◽  
pp. 6397-6406 ◽  
Author(s):  
L.E. Patruno ◽  
P.A. Marchioro Ystad ◽  
J.M. Marchetti ◽  
C.A. Dorao ◽  
H.F. Svendsen ◽  
...  
Keyword(s):  
Flow Rate ◽  
Gas Flow ◽  
Cross Flow ◽  
Gas Flow Rate ◽  
Liquid Entrainment

Axial Dispersion in an Apparatus with Mobile Packing

1993 ◽  
Vol 58 (5) ◽  
pp. 1069-1077
Author(s):  
Zdeněk Palatý
Keyword(s):  
Residence Time ◽  
Flow Rate ◽  
Gas Flow ◽  
Liquid Flow Rate ◽  
Dispersion Model ◽  
Gas Flow Rate ◽  
Rate Region ◽  
Bed Height ◽  
The Mean ◽  
Two Parameters

The paper deals with modelling of the flow of liquid on a plate with mobile packing. The results of measurements have been interpreted by means of a simple dispersion model whose two parameters were determined from the nonideal step-input of a tracer and its response. It has been found that in the gas flow rate region followed (1.0 - 3.5 m s-1), the liquid flow rate followed (5.36 - 12.5 . 10-3 m s-1), and the static bed height followed (21 - 47 . 10-3 m) the diffusion Peclet number is independent of these quantities. The mean residence time of the liquid on the plate decreases with increasing flow rate of Both gas and liquid, but it increases with the increasing height of packing.

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