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Application of elliptic-blending turbulence models to the flow separation over a 6:1 prolate spheroid at incidence

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Abstract

This work investigates the applicability of three different elliptic-blending RANS-based turbulence models to predict the turbulent flow separation over a 6:1 prolate-spheroid at a length-based Reynolds number of 4, 200, 000 for 20 degrees of angle of incidence. The simulations are performed using the turbulence models with and without wall-functions within the commercial finite-volume CFD code STAR-CCM+. A comparison is drawn against the available experimental data regarding local and global variables. Furthermore, to better assess the capability of the turbulence models to reproduce correctly the physics of the flow, contours of turbulence kinetic energy and turbulence anisotropy around the body are evaluated for various models. Overall, the elliptic-blending Reynolds stress turbulence model, especially with wall-functions, by giving the most accurate predictions among all the turbulence models, is found to be successful to some extent in predicting the key flow characteristics.

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Acknowledgements

The first author would like to thank the Human Resources Program PRH-18 from the Agência Nacional do Petráleo, Gás Natural e Biocombustíveis (ANP) and Financiadora de Estudos e Projetos (FINEP) for the financial support. The third author acknowledges the financial support from the Carlos Chagas Filho Foundation - FAPERJ (Grant # E-26/202.600/2019) and the Brazilian Research Council - CNPq (Grant # 305.657/2017-8) to the research activities conducted at the Subsea Technology Lab, COPPE - Federal University of Rio de Janeiro. The authors also would like to acknowledge the financial support from Center of Excellence in Digital Transformation and Artificial Intelligence of the Rio de Janeiro State - Network in Renewable Energy and Climate Change, Carlos Chagas Foundation (FAPERJ), Contract No. E-26/290.023/2021.

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Authors and Affiliations

  1. Ocean Engineering Department - Offshore Renewable Energy Group - GERO/COPPE, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, 21941-914, Brazil

    Mojtaba Maali Amiri, Milad Shadman & Segen F. Estefen

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  1. Mojtaba Maali Amiri
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  2. Milad Shadman
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  3. Segen F. Estefen
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Correspondence to Mojtaba Maali Amiri.

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Amiri, M.M., Shadman, M. & Estefen, S.F. Application of elliptic-blending turbulence models to the flow separation over a 6:1 prolate spheroid at incidence. J Braz. Soc. Mech. Sci. Eng. 45, 75 (2023). https://doi.org/10.1007/s40430-022-04012-w

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