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Multiphase Science and Technology

Publicado 4 números por año

ISSN Imprimir: 0276-1459

ISSN En Línea: 1943-6181

SJR: 0.144 SNIP: 0.256 CiteScore™:: 1.1 H-Index: 24

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EFFECT OF THERMODYNAMIC PARAMETERS AND GEOMETRY ON THERMAL NON-EQUILIBRIUM FLOWS

Volumen 33, Edición 1, 2021, pp. 1-17
DOI: 10.1615/MultScienTechn.2020034221
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SINOPSIS

This paper is an extension of our previous work, which was on the validation of the homogeneous relaxation model (HRM) for multidimensional numerical simulations. Though, in our previous work, turbulence model was incorporated, however, the thermodynamics phenomenon inside a nozzle is dependent on the turbulent characteristics of the flow and the interfacial flow dynamics. Thus, turbulence model (K-ε) was incorporated in the present study, and also a round nozzle is considered as its inlet corner has the potential for flow separation. Further numerical study was carried out to investigate the effect of various thermodynamics parameters and nozzle geometry. Separation of the flow was observed at the nozzle inlet similar to cavitation, resulting in the formation of vapor. It is also observed that with the increase of the fluid inlet temperature the jet vaporizes close to the nozzle exit, while with increase in nozzle diameter, length to diameter ratio, and back pressure, the rate of phase change is more gradual.

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