Manuale di scienze ed arti. ossia repertorio metodico di storia universale ; usi e costumi, mitologia, archeologia, numismatica, blasone, geografia, storia naturale, fisica, chimica, geometria, belle arti, ec., ec. /

Mode of access: Internet.

Evoluzion morfologica ed evoluzione chimica.

Mode of access: Internet.

Lições de philosophia chimica /

Mode of access: Internet.

Annali di chimica : ovvero raccolta di memorie sulle scienze, arti, e manifatture ad essa relative /

Mode of access: Internet.

Annali di chimica e storia naturale : ovvero raccolta di memorie sulle scienze, arti, e manifatture ad esse relative /

Mode of access: Internet.

Disertacion fisico-chimica del examen, analisis y virtudes medicinales de las aguas de la fuente mineral de la Villa de Espinoso del Rey /

Mode of access: Internet.

Giornale di fisica, chimica, storia naturale, medicina ed arti ...

Title varies slightly.

Illustrazione della Portulacca Gilliesii : corredata dell'analisi chimica comparativa colla Portulacca oleracea /

From: Memorie della Accademia delle scienze di Torino. 2, Classe di scienze morali, storiche e filologiche. 1843. 5: 367-386.

Trattato elementare di chimica : presentato in un ordine nuovo dietro le scoperte moderne : e con figure /

Includes index.

Trattato elementare di chimica : presentato in un ordine nuovo dietro le scoperte moderne : con figure /

With two folding tables in v. 1, not included in pagination, at p. 264 and 360.

La Chimica e l'industria.

Has supplements.

Studi e richerche di chimica agraria

Mode of access: Internet.

Chimica agricola : ou estudo analytico dos terrenos, das plantas e dos estrumes /

Mode of access: Internet.

Contact angle effects on microdroplet deformation using CFD

In this paper we use computational fluid dynamics (CFD) to study the effect of contact angle on droplet shape as it moves through a contraction. A new non-dimensional number is proposed in order to predict situations where the deformed droplet will form a slug in the contraction and thus have the opportunity to interact with the channel wall. It is proposed that droplet flow into a contraction is a useful method to ensure that a droplet will wet a channel surface without a trapped lubrication film, and thus help ensure that a slug will remain attached to the wall downstream of the contraction. We demonstrate that when a droplet is larger than a contraction, capillary and Reynolds numbers, and fluid properties may not be sufficient to fully describe the droplet dynamics through a contraction. We show that, with everything else constant, droplet shape and breakup can be controlled simply by changing the wetting properties of the channel wall. CFD simulations with contact angles ranging from 30 degrees to 150 degrees show that lower contact angles can induce droplet breakup while higher contact angles can form slugs with contact angle dependent shape. Crown Copyright (c) 2005 Published by Elsevier Inc. All rights reserved.

Numerical simulation of magnetite segregation in a dense medium cyclone

Numerical simulations of turbulent driven flow in a dense medium cyclone with magnetite medium have been conducted using Fluent. The predicted air core shape and diameter were found to be close to the experimental results measured by gamma ray tomography. It is possible that the Large eddy simulation (LES) turbulence model with Mixture multi-phase model can be used to predict the air/slurry interface accurately although the LES may need a finer grid. Multi-phase simulations (air/water/medium) are showing appropriate medium segregation effects but are over-predicting the level of segregation compared to that measured by gamma-ray tomography in particular with over prediction of medium concentrations near the wall. Further, investigated the accurate prediction of axial segregation of magnetite using the LES turbulence model together with the multi-phase mixture model and viscosity corrections according to the feed particle loading factor. Addition of lift forces and viscosity correction improved the predictions especially near the wall. Predicted density profiles are very close to gamma ray tomography data showing a clear density drop near the wall. The effect of size distribution of the magnetite has been fully studied. It is interesting to note that the ultra-fine magnetite sizes (i.e. 2 and 7 mu m) are distributed uniformly throughout the cyclone. As the size of magnetite increases, more segregation of magnetite occurs close to the wall. The cut-density (d(50)) of the magnetite segregation is 32 gm, which is expected with superfine magnetite feed size distribution. At higher feed densities the agreement between the [Dungilson, 1999; Wood, J.C., 1990. A performance model for coal-washing dense medium cyclones, Ph.D. Thesis, JKMRC, University of Queensland] correlations and the CFD are reasonably good, but the overflow density is lower than the model predictions. It is believed that the excessive underflow volumetric flow rates are responsible for under prediction of the overflow density. (c) 2006 Elsevier Ltd. All rights reserved.