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An injection head to generate a stable falling liquid film within a circular duct

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Abstract

An injection head system was designed and mounted to generate a falling water film in a circular duct with five air jets. The internal diameter of the duct is 94.56 mm. Reynolds number for water is in the range of \(\text {Re}_{\text {in},w}\) = 16,046–19,366; whereas, for the air we have \(\text {Re}_{\text {in},a}\) = 0–32,177. The system is able to generate a uniform water film inside a circular duct. The water film flow is measured with the PIV technique. An air flow is injected into the center of the injection head through five nozzles. The stability and resistance of the water film to the air jets for different flow conditions are verified. In addition, numerical simulations for the water film flow are performed with the open source CFD library OpenFOAM. In particular, the interFoam solver is coupled to a LES \(\kappa\)-equation turbulence model to capture the water-air interface. In all cases, it is observed an undulatory flow behavior described by the axial variation of the interaction of the air and water phases. Although the nature of the flow is unstable, numerical and experimental results show a stable water film thickness.

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Acknowledgements

A preliminary comparison between experimental and numerical results was presented at the 8th OpenFOAM Conference. Authors acknowledge LABINTHAP and CONACYT-SENER 147061 D10/CH2010-02 integral system for steam generation at the bottom of an oil well project for the financial support; as well as, the computer resources, technical expertise, and support provided by the Laboratorio Nacional de Supercómputo del Sureste de México, CONACYT member of the network of national laboratories. L. Borraz acknowledges support through a doctoral scholarship from CONACYT-SENER Fondo Sectorial Sustentabilidad CTAFSE-2-X-15-02. Finally, L. Borraz and A. Beltrán would also like to acknowledge SENER CONACYT 2014-246911 Clúster de Biocombustibles Sólidos para la Generación Térmica y Eléctrica.

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Authors and Affiliations

  1. Instituto de Investigación e Innovación en Energías Renovables, Universidad de Ciencias y Artes de Chiapas, Libramiento Norte Poniente No. 1150, Col. Potinaspak, 29018, Tuxtla Gutiérrez, Chiapas, México

    Luis Borraz & Juan A. Reyes-Nava

  2. Laboratorio de Ingeniería Térmica e Hidráulica Aplicada, Instituto Politécnico Nacional, Unidad Profesional “Adolfo López Mateos”, Zacatenco, Av. Luis Enrique Erro S/N, Zacatenco, 07738, Del. Gustavo A. Madero, Ciudad de México, México

    Luis Borraz, Fernando Larrainzar, Florencio Sánchez-Silva & Ignacio Carvajal-Mariscal

  3. Instituto de Investigaciones en Materiales, Unidad Morelia, Universidad Nacional Autónoma de México, Antigua Carretera a Pátzcuaro No. 8701, Col. Ex Hacienda de San José de la Huerta, 58190, Morelia, Michoacán, México

    Alberto Beltrán

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  1. Luis Borraz
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  2. Fernando Larrainzar
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  3. Florencio Sánchez-Silva
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  4. Juan A. Reyes-Nava
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  5. Ignacio Carvajal-Mariscal
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  6. Alberto Beltrán
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Correspondence to Alberto Beltrán.

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Borraz, L., Larrainzar, F., Sánchez-Silva, F. et al. An injection head to generate a stable falling liquid film within a circular duct. J Braz. Soc. Mech. Sci. Eng. 44, 583 (2022). https://doi.org/10.1007/s40430-022-03885-1

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