A study of the accuracy of neutrally buoyant bubbles used as flow tracers in air
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A study of the accuracy of neutrally buoyant bubbles used as flow tracers in air

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Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, D.C.], [Springfield, Va .
Written in English


  • Space trajectories.,
  • Astrodynamics.

Book details:

Edition Notes

Statementby Michael F. Kerho.
SeriesNASA contractor report -- 191088., NASA contractor report -- NASA CR-191088.
ContributionsNational Aeronautics and Space Administration.
The Physical Object
Pagination1 v.
ID Numbers
Open LibraryOL14704440M

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Kerho MF () A Study Of The Accuracy Of Neutrally Buoyant Bubbles Used As Flow Tracers In Air. Masters Thesis, The University of Illinois at Urbana-Champaign, pp 24–26, 74–76 Google Scholar Maxey MR; Riley JJ () Equation of motion for a small rigid sphere in a nonuniform by: Get this from a library! A study of the accuracy of neutrally buoyant bubbles used as flow tracers in air. [Michael F Kerho; United States. National Aeronautics and Space Administration.]. In previous studies, HFSBs have been identified as valid tracers for measuring quantitative flow features as long as they are neutrally buoyant [57, 58]. In this study, the HFSB were restricted to. Learn science density buoyancy 1 with free interactive flashcards. Choose from different sets of science density buoyancy 1 flashcards on Quizlet.

Air bubble barrier effect on neutrally buoyant objects Article (PDF Available) in Journal of Hydraulic Research 29(4) July with Reads How we measure 'reads'. Take a material that is slightly negatively buoyant. That's what I had proposed but even the ones at g/cc are pretty expensive. I suppose the amount of salt is irrelevant so I could get a material such as trout beads and add enough to make them float. The buoyant force that acts on an object submerged in water is due to this. greater water pressure on the bottom than on the top. The buoyant force that normally acts on a 1-kg fish is. The bubbles are about 3 or 4 mm in diameter and are filled with a heliumair mixture. In practice, it is difficult to make the bubbles truly neutrally buoyant and a strong light source is required to view them because of the limited forward scatter of light from the bubbles. They give a good qualitative view of the general flow and are both.

But, if we remember that the buoyant force is a result of the pressure difference and that the pressure inside an air bubble has to equal the pressure of the water outside (if the outside pressure was higher, the bubble would shrink until the inside pressure would equal the outside pressure), we can conclude that the presence of air bubbles. In this study, the HFSB were restricted to being neutrally buoyant using a filter which removes lighter and heavier than air tracers from the flow. The Stokes number, i.e., the ratio of the particle response time to a characteristic time scale of the flow (S k = τ p / τ f), was calculated to Author: Ian D. Brownstein, Nathaniel J. Wei, John O. Dabiri.   An experimental technique has been developed to produce and to track neutrally buoyant particles in a two-dimensional fluid flow. The key aspect of the technique is the ability to track particles for extended intervals (over an hour), which is essential for quantitative studies of transport and mixing. The approach is composed of two stages. In the first stage, digital image processing Cited by: Numerical study of wall effects on buoyant gas-bubble rise in a liquid-filled finite cylinder Abstract The wall effects on the axisymmetric rise and deformation of an initially spherical gas bubble released from rest in a liquid-filled, finite circular cylinder are numerically investigated. The bulk and gas phases areCited by: