Search results for " Laser diffraction"

showing 4 items of 4 documents

COMPARING PARTICLE SIZE DISTRIBUTION ANALYSIS BY SEDIMENTATION AND LASER DIFFRACTION METHOD

2009

In this paper a brief review of the laser diffraction method is firstly carried out. Then, for 30 soil samples having a different texture classification sampled in Sicilian basin, a comparison between the two techniques is developed. The analysis demonstrated that the sand content measured by Sieve-Hydrometer method can be assumed equal to the one determinated by laser diffraction technique while an overestimation of the clay fraction measured by Sieve-Hydrometer method respect to laser diffraction technique was obtained. Finally a set of equations useful to refer LD measurements to SH method was proposed.

DiffractionMaterials scienceSoil testSoil textureSedimentation (water treatment)Mechanical Engineeringlcsh:SMineralogyBioengineeringLaserlcsh:S1-972Industrial and Manufacturing EngineeringDistribuzione granulometrica Metodo idrometrico diffrattometria laserlaw.inventionlcsh:AgriculturelawParticle-size distributionContent (measure theory)Settore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-ForestaliTexture (crystalline)lcsh:Agriculture (General)Particle-size distribution Sieve-Hydrometer method Laser Diffraction methodBiomedical engineeringJournal of Agricultural Engineering
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Use of supercritical CO2 and N2 as dissolved gases for the atomization of ethanol and water

2012

Supercritical dissolved gas atomization (SDGA) is an atomization process in which a gas at temperatures and pressures above the critical point is used as the atomizing medium. The concept of SDGA has been applied mainly using CO 2 as atomizing gas in various processes developed for the production of fine particles of pharmaceuticals, polymers, and chemical products and for the atomization of fuels. In this work, SDGA, using ethanol and water as the liquids to be atomized, has been experimentally studied. The spray characteristics, in terms of droplet size and distribution, have been investigated using a laser diffraction analyzer. Ethanol has been chosen due to the large miscibility with CO…

Spray characteristicsGeneral Chemical EngineeringAnalytical chemistryMiscibilityLaser diffractionIndustrial and Manufacturing EngineeringPhysics::Fluid DynamicsGas to liquidschemistry.chemical_compoundAtomizing gas Dissolved gas Droplet sizes Fine particles Gas to liquids Laser diffraction Supercritical fluids Supercritical CO2Fine particlesCritical point (thermodynamics)Gas to liquidsPhysics::Atomic and Molecular ClustersChemical Engineering (all)Physics::Atomic PhysicsDissolved gasCondensed Matter::Quantum Gaseschemistry.chemical_classificationAtomizing gasSupercritical fluidsChemistry (all)Droplet sizesGeneral ChemistryPolymerSupercritical CO2Supercritical fluidCondensed Matter::Soft Condensed MatterSolventchemistryCarbon dioxide
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Testing the shape-similarity hypothesis between particle-size distribution and water retention for Sicilian soils

2012

Application of the Arya and Paris (AP) model to estimate the soil water retention curve requires a detailed description of the particlesize distribution (PSD) but limited experimental PSD data are generally determined by the conventional sieve-hydrometer (SH) method. Detailed PSDs can be obtained by fitting a continuous model to SH data or performing measurements by the laser diffraction (LD) method. The AP model was applied to 40 Sicilian soils for which the PSD was measured by both the SH and LD methods. The scale factor was set equal to 1.38 (procedure AP1) or estimated by a logistical model with parameters gathered from literature (procedure AP2). For both SH and LD data, procedure AP2 …

lcsh:AgricultureMechanical Engineeringlcsh:SSettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-ForestaliBioengineeringArya and Paris model laser diffraction method particle size distribution soil water retention curve.lcsh:Agriculture (General)lcsh:S1-972Arya and Paris model laser diffraction method particle size distribution soil water retention curveIndustrial and Manufacturing Engineering
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TESTING THE GRAIN-SIZE DISTRIBUTION DETERMINED BY LASER DIFFRACTOMETRY FOR SICILIAN SOILS

2012

In this paper the soil grain-size distribution determined by Laser Diffraction method (LDM) is tested using the Sieve-Hydrometer method (SHM) applied for 747 soil samples representing a different texture classification, sampled in Sicily. 005_Di_Stefano(599)_39 28-12-2011 15:01 Pagina 45 The analysis showed that the sand content measured by SHM can be assumed equal to the one determined by LDM. An underestimation of the clay fraction measured by LDM was obtained with respect to the SHM and a set of equations useful to refer laser diffraction measurements to SHM was calibrated using the measurements carried out for 635 soil samples. Finally, the proposed equations were tested using independe…

lcsh:AgricultureParticle-size distribution Sieve-Hydrometer method Laser Diffraction method.Mechanical Engineeringlcsh:SSettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-ForestaliBioengineeringlcsh:Agriculture (General)lcsh:S1-972Particle-size distribution Sieve-Hydrometer method Laser Diffraction methodIndustrial and Manufacturing EngineeringJournal of Agricultural Engineering
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