Optical turbulence in confined media Part II:first results using the INTENSE instrument

2017 ◽  
Vol 56 (22) ◽  
pp. 6272 ◽  
Author(s):  
Flavien Blary ◽  
Julien Chabé ◽  
Aziz Ziad ◽  
Julien Borgnino ◽  
Yan Fanteï-Caujolle ◽  
...  
Keyword(s):  
Optical Turbulence ◽  
Confined Media

Optical turbulence in confined media: part I, the indoor turbulence sensor instrument

2016 ◽  
Vol 55 (25) ◽  
pp. 7068 ◽  
Author(s):  
Julien Chabé ◽  
Flavien Blary ◽  
Aziz Ziad ◽  
Julien Borgnino ◽  
Yan Fanteï-Caujolle ◽  
...  
Keyword(s):  
Optical Turbulence ◽  
Confined Media

Optical Turbulence Model for Laser Propagation and Imaging Applications

2004 ◽  
Author(s):  
E. S. Oh ◽  
J. C. Ricklin ◽  
G. C. Gilbreath ◽  
N Vallestero ◽  
Eaton J. ◽  
...  
Keyword(s):  
Turbulence Model ◽  
Optical Turbulence ◽  
Laser Propagation

scholarly journals Phase Behaviour of Methane Hydrates in Confined Media

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 201
Author(s):  
Hao Bian ◽  
Lu Ai ◽  
Klaus Hellgardt ◽  
Geoffrey C. Maitland ◽  
Jerry Y. Y. Heng
Keyword(s):  
Phase Behaviour ◽  
Methane Hydrates ◽  
Scanning Calorimetry ◽  
Macroporous Silica ◽  
Interfacial Energies ◽  
Temperature Method ◽  
Hydrate Phase ◽  
Dissociation Temperature ◽  
Confined Media ◽  
Decomposition Behaviour

In a study designed to investigate the melting behaviour of natural gas hydrates which are usually formed in porous mineral sediments rather than in bulk, hydrate phase equilibria for binary methane and water mixtures were studied using high-pressure differential scanning calorimetry in mesoporous and macroporous silica particles having controlled pore sizes ranging from 8.5 nm to 195.7 nm. A dynamic oscillating temperature method was used to form methane hydrates reproducibly and then determine their decomposition behaviour—melting points and enthalpies of melting. Significant decreases in dissociation temperature were observed as the pore size decreased (over 6 K for 8.5 nm pores). This behaviour is consistent with the Gibbs–Thomson equation, which was used to determine hydrate–water interfacial energies. The melting data up to 50 MPa indicated a strong, essentially logarithmic, dependence on pressure, which here has been ascribed to the pressure dependence of the interfacial energy in the confined media. An empirical modification of the Gibbs–Thomson equation is proposed to include this effect.

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