MICROBUBBLE DRAG REDUCTION.

C. L. Merkle, S. Deutsch, S. Pal, John Michael Cimbala, W. Seelig

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    4 Citations (Scopus)

    Abstract

    Photographic and optical surveys of microbubble boundary layers are presented. The results show that the outer edge of the bubble cloud diffuse away from the wall as the bubbles are swept downstream. The plate-on-bottom orientation contains a bubble-free region near the wall that cannot be discerned for the plate-on-top configuration. Skin friction measurements made when the bubble-free region extends to y** plus equals 100 show there is no longer any C//f reduction present suggesting bubbles are not effective when they are in the outer portion of the boundary layer. Bubble size measurements show sizes from 200 to 1100 mu m. Bubble size increases with airflow and decreases with freestream velocity. Bubble coalescence with distance from the injection section appears to be significant.

    Original languageEnglish (US)
    Title of host publicationUnknown Host Publication Title
    EditorsWilliam C. Webster
    PublisherNatl Acad Press
    Pages199-215
    Number of pages17
    StatePublished - 1986

    Fingerprint

    Drag reduction
    Boundary layers
    Skin friction
    Coalescence

    All Science Journal Classification (ASJC) codes

    • Engineering(all)

    Cite this

    Merkle, C. L., Deutsch, S., Pal, S., Cimbala, J. M., & Seelig, W. (1986). MICROBUBBLE DRAG REDUCTION. In W. C. Webster (Ed.), Unknown Host Publication Title (pp. 199-215). Natl Acad Press.
    Merkle, C. L. ; Deutsch, S. ; Pal, S. ; Cimbala, John Michael ; Seelig, W. / MICROBUBBLE DRAG REDUCTION. Unknown Host Publication Title. editor / William C. Webster. Natl Acad Press, 1986. pp. 199-215
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    Merkle, CL, Deutsch, S, Pal, S, Cimbala, JM & Seelig, W 1986, MICROBUBBLE DRAG REDUCTION. in WC Webster (ed.), Unknown Host Publication Title. Natl Acad Press, pp. 199-215.

    MICROBUBBLE DRAG REDUCTION. / Merkle, C. L.; Deutsch, S.; Pal, S.; Cimbala, John Michael; Seelig, W.

    Unknown Host Publication Title. ed. / William C. Webster. Natl Acad Press, 1986. p. 199-215.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

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    AB - Photographic and optical surveys of microbubble boundary layers are presented. The results show that the outer edge of the bubble cloud diffuse away from the wall as the bubbles are swept downstream. The plate-on-bottom orientation contains a bubble-free region near the wall that cannot be discerned for the plate-on-top configuration. Skin friction measurements made when the bubble-free region extends to y** plus equals 100 show there is no longer any C//f reduction present suggesting bubbles are not effective when they are in the outer portion of the boundary layer. Bubble size measurements show sizes from 200 to 1100 mu m. Bubble size increases with airflow and decreases with freestream velocity. Bubble coalescence with distance from the injection section appears to be significant.

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    Merkle CL, Deutsch S, Pal S, Cimbala JM, Seelig W. MICROBUBBLE DRAG REDUCTION. In Webster WC, editor, Unknown Host Publication Title. Natl Acad Press. 1986. p. 199-215