Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A basic study of the mechanism of deposition of small particles on cylindrical collectors in the presence of electrostatic forces has been made. Theoretical equations predicting the efficiency of collection have been derived and solved with a digital computer. The solution of these equations is shown. The deposition of liquid aerosol particles on cylindrical collectors was measured experimentally for a range of electrostatic conditions. The experimental results agree with the theory. An experimental study was made of the effect of electrical charges on aerosol particles on the filtration efficiency of glass fiber mats. Experiments were also made on the effect of placing a potential on a mat of fine wire and on filtration by a mat of a tangled wire dipole. (auth).
Electrostatic Effects in the Deposition of Aerosols on Cylindrical Shapes. Technical Report
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A basic study of the mechanism of deposition of small particles on cylindrical collectors in the presence of electrostatic forces has been made. Theoretical equations predicting the efficiency of collection have been derived and solved with a digital computer. The solution of these equations is shown. The deposition of liquid aerosol particles on cylindrical collectors was measured experimentally for a range of electrostatic conditions. The experimental results agree with the theory. An experimental study was made of the effect of electrical charges on aerosol particles on the filtration efficiency of glass fiber mats. Experiments were also made on the effect of placing a potential on a mat of fine wire and on filtration by a mat of a tangled wire dipole. (auth).
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A basic study of the mechanism of deposition of small particles on cylindrical collectors in the presence of electrostatic forces has been made. Theoretical equations predicting the efficiency of collection have been derived and solved with a digital computer. The solution of these equations is shown. The deposition of liquid aerosol particles on cylindrical collectors was measured experimentally for a range of electrostatic conditions. The experimental results agree with the theory. An experimental study was made of the effect of electrical charges on aerosol particles on the filtration efficiency of glass fiber mats. Experiments were also made on the effect of placing a potential on a mat of fine wire and on filtration by a mat of a tangled wire dipole. (auth).
Nuclear Science Abstracts
Author:
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 896
Book Description
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 896
Book Description
U.S. Government Research Reports
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 214
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 214
Book Description
Air Cleaning Conference
Author: U.S. Atomic Energy Commission
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 404
Book Description
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 404
Book Description
TID.
Author:
Publisher:
ISBN:
Category : Energy development
Languages : en
Pages : 170
Book Description
Publisher:
ISBN:
Category : Energy development
Languages : en
Pages : 170
Book Description
Properties of Electrically Charged Aerosols
Author: Herbert Faraday Kraemer
Publisher:
ISBN:
Category : Aerosols
Languages : en
Pages : 106
Book Description
Publisher:
ISBN:
Category : Aerosols
Languages : en
Pages : 106
Book Description
Sixth AEC Air Cleaning Conference
Author:
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 400
Book Description
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 400
Book Description
The Effect of Particle Electrostatic Charge on Filtration by Fibrous Filters
Author: Dale Allen Lundgren
Publisher:
ISBN:
Category : Aerosols
Languages : en
Pages : 174
Book Description
Publisher:
ISBN:
Category : Aerosols
Languages : en
Pages : 174
Book Description
Influence of Electrostatic Charge Upon the Deposition Behavior of Pharmaceutical Aerosols Within Cascade Impactors
Author: Megha Mohan
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Cascade impactors, routinely used for in vitro particle size characterization of pharmaceutical aerosols, are calibrated using dilute, charge-neutralized, monodisperse aerosols. But pharmaceutical aerosols are known to generate concentrated, inherently charged, polydisperse aerosol clouds. A computational model of the Andersen Cascade Impactor (ACI) suggested that the presence of charge on aerosol particles may influence their deposition within the ACI, but experimental validation of the model is warranted. This dissertation investigates the influence of electrostatic charge upon the deposition behavior of aerosols within cascade impactors, to address the impact of charge on particle size characterization. The influence of applied charge upon the deposition pattern and aerodynamic particle size distribution (APSD) of commercially available pressurized metered dose inhalers (pMDIs) within the Electrical Low Pressure Impactor (ELPI) was examined. Electrostatic properties were modified using an external voltage source in conjunction with the ELPI corona charger and observed to be dependent on the formulation and device packaging. Induced artificial charge on the aerosol particles influenced the deposition pattern within the impactor, but did not result in a significant change in the apparent APSD. An experimental apparatus capable of producing charge neutralized and charged aerosol, with targeted deposition on the CFD predicted "charge sensitive" ACI stages, was developed. In vitro results were observed to be in partial agreement with the CFD predictions. While charge influenced the deposition pattern in the ACI with increased deposition observed in the charger and on the upper stages of the ACI, it did not influence the apparent APSD of the aerosol. Electrostatic charge effects on deposition behavior within cascade impactors were delineated with respect to space charge and image charge effects by investigating the influence of impactor grounding, particle size, stage coating and loading. While the deposition pattern within the ACI was influenced by charge, only stage coating and stage loading resulted in a small, significant difference in the apparent APSD, which may not be practically relevant due to the variability associated with in vitro aerosol testing. Similar trends were observed in the deposition behavior of charge neutralized and charged aerosol within an abbreviated ACI system compared to the full resolution ACI.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Cascade impactors, routinely used for in vitro particle size characterization of pharmaceutical aerosols, are calibrated using dilute, charge-neutralized, monodisperse aerosols. But pharmaceutical aerosols are known to generate concentrated, inherently charged, polydisperse aerosol clouds. A computational model of the Andersen Cascade Impactor (ACI) suggested that the presence of charge on aerosol particles may influence their deposition within the ACI, but experimental validation of the model is warranted. This dissertation investigates the influence of electrostatic charge upon the deposition behavior of aerosols within cascade impactors, to address the impact of charge on particle size characterization. The influence of applied charge upon the deposition pattern and aerodynamic particle size distribution (APSD) of commercially available pressurized metered dose inhalers (pMDIs) within the Electrical Low Pressure Impactor (ELPI) was examined. Electrostatic properties were modified using an external voltage source in conjunction with the ELPI corona charger and observed to be dependent on the formulation and device packaging. Induced artificial charge on the aerosol particles influenced the deposition pattern within the impactor, but did not result in a significant change in the apparent APSD. An experimental apparatus capable of producing charge neutralized and charged aerosol, with targeted deposition on the CFD predicted "charge sensitive" ACI stages, was developed. In vitro results were observed to be in partial agreement with the CFD predictions. While charge influenced the deposition pattern in the ACI with increased deposition observed in the charger and on the upper stages of the ACI, it did not influence the apparent APSD of the aerosol. Electrostatic charge effects on deposition behavior within cascade impactors were delineated with respect to space charge and image charge effects by investigating the influence of impactor grounding, particle size, stage coating and loading. While the deposition pattern within the ACI was influenced by charge, only stage coating and stage loading resulted in a small, significant difference in the apparent APSD, which may not be practically relevant due to the variability associated with in vitro aerosol testing. Similar trends were observed in the deposition behavior of charge neutralized and charged aerosol within an abbreviated ACI system compared to the full resolution ACI.
Aerosol Science
Author: Charles Norman Davies
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 498
Book Description
Composite work comprising a textbook on branches of aerosol science - covers theoretical and technical aspects of the generation, measurement and use of aerosols. References.
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 498
Book Description
Composite work comprising a textbook on branches of aerosol science - covers theoretical and technical aspects of the generation, measurement and use of aerosols. References.