Results 21 to 30 of about 30,941 (214)

A scheme for radiation pressure and photon diffusion with the M1 closure in RAMSES-RT [PDF]

open access: yes, 2015
We describe and test an updated version of radiation-hydrodynamics (RHD) in the RAMSES code, that includes three new features: i) radiation pressure on gas, ii) accurate treatment of radiation diffusion in an unresolved optically thick medium, and iii ...
Rosdahl, J., Teyssier, R.
core   +3 more sources

Calorimetric measurements of the Ca-Li liquid alloys [PDF]

open access: yesJournal of Mining and Metallurgy. Section B: Metallurgy, 2017
The ternary Cu-Al-Sn phase diagram is the base for several important types of alloys, with relevant industrial interest and applications. The knowledge of the melting/solidification alloys characteristics are determinant for their preparation and ...
Dębski A.   +3 more
doaj   +1 more source

Assessment of W1 and W2 theories for the computation of electron affinities, ionization potentials, heats of formation, and proton affinities [PDF]

open access: yes, 2001
The performance of two recent {\em ab initio} computational thermochemistry schemes, W1 and W2 theory [J.M.L. Martin and G. de Oliveira, J. Chem. Phys.
Martin, Jan M. L., Parthiban, S.
core   +2 more sources

Jarosite stability on Mars [PDF]

open access: yes, 2005
Jarosite, a potassium (sodium) iron sulphate hydrated mineral, has recently been identified on the martian surface by the Opportunity rover. Using recent thermochemical data [Drouet and Navrotsky, 2003, Geochim. Cosmochim.
Drouet, Christophe   +2 more
core   +3 more sources

The Automation of Thermal Analysis Instrumentation: Thermogravimetry and Differential Thermal Analysis

open access: yesCHIMIA, 1972
The automation of the thermal analysis instruments, differential thermal analysis (dta) and the thermobalance, is described. The dta instrument is capable of studying eight individual samples, each contained in a glass capillary tube, in a sequential ...
W.W. Wendlandt
doaj   +1 more source

Synthesis of Samarium OxysulfateSm2O2SO4 in the High-Temperature Oxidation Reaction and Its Structural, Thermal and Luminescent Properties

open access: yesMolecules, 2020
The oxidation process of samariumoxysulfide was studied in the temperature range of 500−1000 °C. Our DTA investigation allowed for establishing the main thermodynamic (∆Hºexp = −654.6 kJ/mol) and kinetic characteristics of the ...
Yu. G. Denisenko   +10 more
doaj   +1 more source

Improvement of Thermochemical Processes of Laser-Matter Interaction and Optical Systems for Wavefront Shaping

open access: yesApplied Sciences, 2022
Laser thermochemical processes of metal surface oxidation are promising for creating new advanced technologies to meet the growing needs of opto- and micro-electronics, photonics, catalysis, sensorics and other high-tech industries.
Serguei P. Murzin
doaj   +1 more source

Stagnation Hugoniot Analysis for Steady Combustion Waves in Propulsion Systems [PDF]

open access: yes, 2006
The combustion mode in a steady-flow propulsion system has a strong influence on the overall efficiency of the system. To evaluate the relative merits of different modes, we propose that it is most appropriate to keep the upstream stagnation state fixed ...
Shepherd, J. E., Wintenberger, E.
core   +1 more source

Thermochemistry of Combustion in Polyvinyl Alcohol + Hydroxylammonium Nitrate

open access: yesAerospace, 2021
A mixture of polyvinyl alcohol (PVA) and hydroxylammoniun nitrate (HAN) forms a gummy solid known as a plastisol, which is ionically conducting. When an electrostatic potential of 200 V DC is applied across the plastisol, it ignites.
James K. Baird, Robert A. Frederick
doaj   +1 more source

Thermodynamic database for multicomponent oxide systems

open access: yesChimica Techno Acta, 2018
A state-of-the-art thermodynamic database has been developed for multicomponent oxide systems. It can be used in combination with FactSage software to calculate the properties of metallurgical slags, glasses, ceramics, refractories, minerals, cements ...
S. A. Decterov
doaj   +1 more source

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