DEVELOPMENT OF A NEW ENTRANCE CHAMBER FOR CONTINUOUS VORTEX TUBE OPERATION AT LOW PRESSURES

2017 ◽  
Author(s):  
Maria Eugenia V. da Silva ◽  
Paulo Alexandre Costa Rocha ◽  
Hugo Alberto López Clemente
Keyword(s):  
Vortex Tube ◽  
Low Pressures

A COMBINED HEAT AND MASS TRANSFER MODEL FOR THE RANQUE HILSCH VORTEX TUBE

2018 ◽  
Author(s):  
M. Chatterjee ◽  
S. Mukhopadhyay ◽  
P. K. Vijayan
Keyword(s):  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Vortex Tube ◽  
Transfer Model ◽  
Mass Transfer Model

Laser Welding at Low Pressures

1991 ◽  
Vol 23 (2) ◽  
pp. 80 ◽  
Author(s):  
G. L. Goswami
Keyword(s):  
Laser Welding ◽  
Low Pressures

scholarly journals Kelvin waves on helical vortex tube in swirling flow

2018 ◽  
Vol 980 ◽  
pp. 012003
Author(s):  
M A Tsoy ◽  
S G Skripkin ◽  
P A Kuibin ◽  
S I Shtork ◽  
S V Alekseenko
Keyword(s):  
Vortex Tube ◽  
Swirling Flow ◽  
Kelvin Waves ◽  
Helical Vortex

scholarly journals Interaction of the combustion front of methane-air mixture at low pressures with obstacles of cylindrical shape

FirePhysChem ◽  
2021 ◽  
Author(s):  
Nickolai M. Rubtsov ◽  
Victor I. Chernysh ◽  
Georgii I. Tsvetkov ◽  
Kirill Ya. Troshin
Keyword(s):  
Combustion Front ◽  
Cylindrical Shape ◽  
Low Pressures

scholarly journals Behavior and properties of water in silicate melts under deep mantle conditions

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Bijaya B. Karki ◽  
Dipta B. Ghosh ◽  
Shun-ichiro Karato
Keyword(s):  
Electrical Conductivity ◽  
Molar Volume ◽  
Water Solution ◽  
Pure Water ◽  
Electrical Conductance ◽  
Water Structure ◽  
Bulk Water ◽  
Silicate Melts ◽  
Pressure Regime ◽  
Low Pressures

AbstractWater (H2O) as one of the most abundant fluids present in Earth plays crucial role in the generation and transport of magmas in the interior. Though hydrous silicate melts have been studied extensively, the experimental data are confined to relatively low pressures and the computational results are still rare. Moreover, these studies imply large differences in the way water influences the physical properties of silicate magmas, such as density and electrical conductivity. Here, we investigate the equation of state, speciation, and transport properties of water dissolved in Mg1−xFexSiO3 and Mg2(1−x)Fe2xSiO4 melts (for x = 0 and 0.25) as well as in its bulk (pure) fluid state over the entire mantle pressure regime at 2000–4000 K using first-principles molecular dynamics. The simulation results allow us to constrain the partial molar volume of the water component in melts along with the molar volume of pure water. The predicted volume of silicate melt + water solution is negative at low pressures and becomes almost zero above 15 GPa. Consequently, the hydrous component tends to lower the melt density to similar extent over much of the mantle pressure regime irrespective of composition. Our results also show that hydrogen diffuses fast in silicate melts and enhances the melt electrical conductivity in a way that differs from electrical conduction in the bulk water. The speciation of the water component varies considerably from the bulk water structure as well. Water is dissolved in melts mostly as hydroxyls at low pressure and as –O–H–O–, –O–H–O–H– and other extended species with increasing pressure. On the other hand, the pure water behaves as a molecular fluid below 15 GPa, gradually becoming a dissociated fluid with further compression. On the basis of modeled density and conductivity results, we suggest that partial melts containing a few percent of water may be gravitationally trapped both above and below the upper mantle-transition region. Moreover, such hydrous melts can give rise to detectable electrical conductance by means of electromagnetic sounding observations.

scholarly journals Simulation Analysis of Vortex Tube Parameters for Desalination Device Using Ship Exhaust Heat

2021 ◽  
Vol 1865 (3) ◽  
pp. 032042
Author(s):  
Shiji He ◽  
Changqing Zhou ◽  
Wenbo Zhang ◽  
Bingjin Liu ◽  
Yue Cui
Keyword(s):  
Vortex Tube ◽  
Simulation Analysis ◽  
Exhaust Heat
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