Velocity Measurements and Flow Visualization in Low Viscosity Jets
2020-08
Loading...
View/Download File
Persistent link to this item
Statistics
View StatisticsJournal Title
Journal ISSN
Volume Title
Title
Velocity Measurements and Flow Visualization in Low Viscosity Jets
Authors
Published Date
2020-08
Publisher
Type
Thesis or Dissertation
Abstract
Mixing of a liquid jet into a surrounding fluid is a commonly encountered phenomenon in both natural and engineering systems. Understanding the influence of viscosity ratio on jet stability can help design fluid systems with enhanced or suppressed mixing characteristics. Experiments were conducted with low viscosity axisymmetric liquid jets to characterize the behavior of instabilities as a function of viscosity ratio. In the experiment, viscosity ratios M (ambient-to-jet) from 1 to 50 were imaged in a constant density environment at jet Reynolds numbers ranging from 794 to 2464. Images display a change from axisymmetric jet breakup to a helical mode at high Reynolds numbers and high ambient-to-jet viscosity ratios. Additionally, hot film velocity measurements were taken to characterize the jet profile and quantitatively measure both the mean and fluctuating velocity fields. The spectral data captured singular peaks in the frequency domain, in the range of 6-30 Hz. This peak frequency was further shown to have a dependence on both the jet Reynolds number and the ambient-to-jet viscosity ratio. Images of jet breakup, jet velocity profiles, and velocity instability spectra are shown and discussed.
Keywords
Description
University of Minnesota M.S.M.E. thesis. August 2020. Major: Mechanical Engineering. Advisor: Vinod Srinivasan. 1 computer file (PDF); v, 68 pages.
Related to
Replaces
License
Series/Report Number
Funding information
Isbn identifier
Doi identifier
Previously Published Citation
Suggested citation
Wright, Ian. (2020). Velocity Measurements and Flow Visualization in Low Viscosity Jets. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/217123.
Content distributed via the University Digital Conservancy may be subject to additional license and use restrictions applied by the depositor. By using these files, users agree to the Terms of Use. Materials in the UDC may contain content that is disturbing and/or harmful. For more information, please see our statement on harmful content in digital repositories.