Numerical simulation of binary-gas condensation characteristics in supersonic nozzles

Estudo da viabilidade técnica de um dispositivo de extração de água do ar atmosférico para o desenvolvimento regional de comunidades isoladas

“…Em comparação com o processamento tradicional, a principal vantagem da tecnologia de separação supersônica é o tamanho reduzido e a estrutura flexível, o que a torna mais adequada para operações não tripuladas, por exemplo, para o campo de petróleo e gás em áreas offshore, desérticas e remotas. Além disso, a tecnologia de separação por vórtice supersônico facilita o desenvolvimento da indústria de gás natural de maneira segura e ambientalmente correta, além de ajudar a melhorar a conservação de energia e a redução do consumo [3,4].…”

Shortcut modeling of natural gas supersonic separation

“…However, due to difficulties in modeling complex mixtures specifically dealing with multi-phase flow, phase equilibrium calculations, stability of simulations and computational load, many studies develop models and test them with simplified working fluid. For instance, numerous CFD studies use pure methane, air, water or a mixture of them as their working fluid in supersonic nozzles [59][60][61]. Other studies use simplified natural gas working fluids with a 2-5 component mixture [17,19].…”

Supersonic gas separators: Review of latest developments

“…As expected, it is shown that energy loss across the shockwave due to dissipation noted in this article that a grid independence study was completed prior to analysis of the results, but it is possible that these oscillations could have been avoided with a finer grid as they have appeared only with increased expansion ratio and flow velocity. In later work [34], condensation of binary gas mixtures in supersonic separators is numerically investigated using Fluent software and Lamanna's improved ICCT for nucleation [28] and Gyarmathy's model for growth of the droplets [75]. Model predictions are validated against experimental data from [28] and [35] and sensitivity is analysed with respect to carrier inlet temperature and pressure as well as carrier gas (nitrogen and methane).…”

“…A C C E P T E D ACCEPTED MANUSCRIPT 34 Rashidi et al using the methodology developed by Karimi and Abedinzadegan Abdi [24][25][26] developed similar methodology comprising the use of a system of seventeen non-linear equations to predict the location of the normal shockwave in a supersonic nozzle [49]. Rashidi et al's model, and no dependence was shown between real and ideal gas models.…”