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Buoyancy effects on flow transition in low-density inertial gas jets

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Abstract

Effects of buoyancy on transition from laminar to turbulent flow are presented for a momentum-dominated helium jet injected into ambient air. The buoyancy was varied in a 2.2 s drop tower facility without affecting the remaining operating parameters. The jet flow in Earth gravity and microgravity was visualized using the rainbow schlieren deflectometry apparatus. Results show significant changes in the flow structure and transition behavior with change of buoyancy.

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Acknowledgements

This work was supported by the Physical Sciences Division of NASA’s Office of Biological and Physical research under grant NAG 3-2388.

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Author notes

  1. Ajay K. Agrawal

    Present address: Department of Mechanical Engineering, University of Alabama, Tuscaloosa, AL, 35487, USA

Authors and Affiliations

  1. School of Aerospace and Mechanical Engineering, University of Oklahoma, 865 Asp Avenue, Room 208, Norman, OK, 73019, USA

    Kasyap S. Pasumarthi & Ajay K. Agrawal

Authors
  1. Kasyap S. Pasumarthi
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  2. Ajay K. Agrawal
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Correspondence to Ajay K. Agrawal.

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Pasumarthi, K.S., Agrawal, A.K. Buoyancy effects on flow transition in low-density inertial gas jets. Exp Fluids 38, 541–544 (2005). https://doi.org/10.1007/s00348-005-0927-2

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  • DOI: https://doi.org/10.1007/s00348-005-0927-2

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