scholarly journals Physico-chemical modeling of the First Aerosol Characterization Experiment (ACE 1) Lagrangian B: 2. DMS emission, transport and oxidation at the mesoscale

1998 ◽  
Vol 103 (D13) ◽  
pp. 16457-16473 ◽  
Author(s):  
Céline Mari ◽  
Karsten Suhre ◽  
Timothy S. Bates ◽  
James E. Johnson ◽  
Robert Rosset ◽  
...  
Keyword(s):  
Chemical Modeling ◽  
Physico Chemical ◽  
Aerosol Characterization

Physico-chemical modeling of the First Aerosol Characterization Experiment (ACE 1) Lagrangian B: 1. A moving column approach

1998 ◽  
Vol 103 (D13) ◽  
pp. 16433-16455 ◽  
Author(s):  
Karsten Suhre ◽  
Céline Mari ◽  
Timothy S. Bates ◽  
James E. Johnson ◽  
Robert Rosset ◽  
...  
Keyword(s):  
Chemical Modeling ◽  
Physico Chemical ◽  
Aerosol Characterization

Physico-Chemical Modeling of Third Body Rheology

2010 ◽  
Author(s):  
Mathieu Renouf
Keyword(s):  
Third Body ◽  
Unknown Parameters ◽  
Chemical Modeling ◽  
The Third ◽  
Real Contact ◽  
Physico Chemical ◽  
Role Concerns ◽  
Set Up ◽  
Discrete Element Methods ◽  
Two Bodies

The well-known concept of third body was introduced by Godet in the seventies to characterise the discontinuous and heterogeneous interface that separates two bodies in contact. This thin layer (from some nanometers to some micrometers high) appears to possess its own rheology depending of contact conditions, material properties and often, extra unknown parameters. If its main common role concerns essentially mechanical aspects such as velocity accommodation, load carrying capacity and solid lubricant, it plays an important role in other physical aspects. For example, it ensures the thermal continuity between two bodies in contact and explains the jump of temperature observed experimentally. Moreover, it is able to capture the maximal temperature through its thickness. Due to the difficulty to instrument a real contact without disturbing the local rheology, observations of the third body rheology occur only on simplified experimental set-up. To reproduce and try to understand “real contact in presence of third body”, numerical tools have been developed and adapt to face new challenge raised by the third-body concept. The discontinuity and heterogeneity of such interface led researchers to use discrete element methods (DEM) to describe its evolution. Several improvments of the method allow to deal with the mechanical and the thermal behaviour of such media but without interactions. The integration of physicochemical aspects is presented in the paper to link thermal and mechanical behaviour and proposed a model able to represent the multi-physical feature of a contact interface.

scholarly journals Physico-chemical modeling of hidrothermal mineralization processes at Ni-Co-As (± U-Ag), Co-S-As (± Au-W), Cu-Co-As (± Sb-Ag) deposits.

2019 ◽  
Vol 61 (3) ◽  
pp. 31-63
Author(s):  
V. I. Lebedev ◽  
A. A. Borovikov ◽  
L. V. Gushchina ◽  
I. S. Shabalin
Keyword(s):  
Fluid Inclusions ◽  
Main Task ◽  
Chemical Modeling ◽  
Physico Chemical ◽  
Icp Ms ◽  
Gold Silver ◽  
Chemical Factors ◽  
Mineralization Processes ◽  
Physical And Chemical ◽  
Instrumental Methods

A generalization of the results of the study of the composition of metal-bearing fluids of cobalt deposits of hydrothermal Genesis, formed in different geodynamic settings in connection with the formation of alkaline and alkaline-basite intrusions and dikes. To determine the physical and chemical parameters of ore deposition from fluid inclusions in minerals, both traditional and new instrumental methods of thermobarogeochemistry were used: thermo-and cryometry, RAMAN spectroscopy, concentration of ore and petrogenic elements in individual fluid inclusions were evaluated by LA-ICP-MS. The obtained results served as the basis for the study, the main task of which was the thermodynamic modeling of the conditions of joint transport and deposition of Co, Ni, Cu, Fe, Mg, Ca, Ag, Au, Bi, U, Pt and Pd C calculation of a number of equilibrium States of the hydrothermal system, the composition close to the natural ore-forming fluids. Physical and chemical factors of native deposits-gold, silver, platinum and palladium in the ores of such deposits are revealed. The obtained data can serve as a basis for the development of correct genetic models of ore-forming systems of cobalt deposits and contribute to solving the problems of their search.

Sign in / Sign up

Export Citation Format

Share Document