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Kristen Collar Florida State University Physics

Kristen Collar Florida State University Physics. Georgia Institute of Technology | Milwaukee School of Engineering | North Carolina A&T State University | Purdue University University of Illinois, Urbana-Champaign | University of Minnesota | Vanderbilt University.

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Kristen Collar Florida State University Physics

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  1. Kristen Collar Florida State University Physics Georgia Institute of Technology | Milwaukee School of Engineering | North Carolina A&T State University | Purdue University University of Illinois, Urbana-Champaign | University of Minnesota | Vanderbilt University Project 1G.2: Carbon Nanotube Additives for Fluid Power Efficiency Dr. Ilker Bayer Andrea Brown Rachel Loth Dr. Eric Loth Phil Martorana Adam Steele

  2. Motivation Background Objective Experiment Results Conclusions Outline

  3. Reduce Turbulent Drag using dilute concentrations of additives in fluid flow line systems Motivation

  4. Motivation Toms and Mysels discovered in the 1940s that the addition of a very small amount (~ppm) of a high molecular weight polymers to a turbulent flow could greatly reduce turbulent frictional drag

  5. Motivation Fire hoses Alaskan pipe lines Submarines

  6. Drag reducing effectiveness of polymer molecules degrades with their time in the flow Degredation limits the application to a non-recirulating system No one has shown drag reduction with the addition of only carbon nanotubes (CNTs) Background

  7. Objective Investigate turbulent drag reduction using CNT nanofluids Employ the high strength properties of CNTs to reduce degredation and scission effects Optimize dispersion using surfactants and sonication

  8. Methodology

  9. Sonication

  10. Sonication

  11. Dispersion Sonication Triton X-100 5 weeks later Before After

  12. Imaging Envionmental Scanning Electron Microscope (ESEM) CNTs without surfactant CNTs with surfactant (SDS)

  13. Imaging Transmission Electron Microscope (TEM) 1000nm 1000nm CNTs with surfactant (SDS) CNTs without surfactant

  14. Experimental Setup Flowmeter

  15. Results

  16. Results

  17. Results

  18. Results

  19. Conclusion Using TEM, single dispersed CNTs with <8 nm diameter were imaged Stable dispersions were achieved for CNT nanofluids using sonication and surfactants CNTs alone have not shown significant drag reduction

  20. CNTs with different aspect ratios PEO and <8nm diameter CNTs Investigate the transitional area Experiment on tubes of different roughness Future Work

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