Chris Crowley

Graduate Research Assistant

Education

• Georgia Institute of Technology, Atlanta (2013 - present)
  • M.S. in Physics (2015)
  • Ph.D. in Physics (2022 - expected)
    • minor in Mechanical engeneering
• ​​University of Maryland, College Park (2008 - 2013)
  • ​B.S. in Physics (2013)
    • ​minor in Philosophy

Research

In spring of 2014 Chris joined Prof. Schatz' Pattern Formation and Control Lab. Before joining Prof. Schatz lab, he worked at the National Institute of Standards and Technology (NIST) in the Fluid Metrology Group where he studied fluid measurement science. While at NIST, he maintained various liquid flow primary standards and he worked in the wind tunnel developing high fidelity anemometer calibration techniques for varying turbulence intensities. Now, in the Pattern Formation and Control Lab, Chris is searching for evidence of dynamically relevant, unstable solutions to the Navier-Stokes equations at the onset of turbulence in Taylor-Couette flow using fully time resolved tomographic particle image velocimetry (tomo PIV). These special solutions called, exact coherent structures play a key role in a fundamentally deterministic description of turbulence.

Papers

Journal articles and special publications:

• "Turbulence Tracks Simple Solutions", Christopher J. Crowley, Joshua Pughe-Sanford, Wesley Toler, Michael C Krygier, Roman O Grigoriev, Michael F Schatz; Proceedings of the National Academy of Sciences (Under review).

• "A novel subcritical transition to turbulence in Taylor–Couette flow with counter-rotating cylinders." Christopher J. Crowley, Michael C. Krygier (a1), Daniel Borrero-Echeverry, Roman O. Grigoriev, and Michael F. Schatz; Journal of Fluid Mechanics 892, A12. January 2020

• "Rheoscopic fluids in a post-Kalliroscope world", Daniel Borrero-Echeverry, Christopher J. Crowley, and Tyler P. Riddick; Physics of Fluids 30, August 2018, 087103. (Made Editor's Pick)

• "The effect of turbulence on a multi-hole Pitot calibration", Christopher Crowley, Iosif I. Shinder, Michael R. Moldover; Flow Measurement and Instrumentation 33, October 2013, Pages 106-109, ISSN 0955-5986.

• "Methodology for cross-talk elimination in simultaneous voltage and calcium optical mapping measurements with semasbestic wavelengths", Ilija Uzelac, Christopher J Crowley, Shahriar Iravanian, Tae Yun Kim, Hee Cheol Cho, Flavio H Fenton; Frontiers in Physiology 13, February 2022.

• "Improvements to NIST׳s air speed calibration service", Iosif I. Shinder, Christopher J. Crowley, B. James Filla, Michael R. Moldover; Flow Measurement and Instrumentation 44, August 2015, Pages 19–26.

• "Uncertainty Analysis of NIST’s 20 L Hydrocarbon Liquid Flow Standard", Johnson AN, Crowley CJ, Yeh TT; Journal of the Metrology Society of India, 2011 Pages 187–202.

• "Liquid Flow Meter Calibrations with the 0.1 L/s and 2.5 L/s Piston Provers", Jodie G. Pope, John D. Wright, Aaron N. Johnson, Christopher J. Crowley; NIST Special Publication 250-1039r1.

• "A Comparison of 12 US Liquid Hydrocarbon Flow Standards and the Transition to Safer Calibration Liquids", John Wright, Aaron Johnson, Gina Kline, Chris Crowley, et. al.; Cal Lab 2012; 19-2:30-38.

​Conference papers:

• "Isosbestic Point in Optical Mapping; Theoretical and Experimental Determination With Di-4-ANBDQPQ Transmembrane Voltage Sensitive Dye." I. Uzelac, C. J. Crowley and F. H. Fenton; 2019 Computing in Cardiology (CinC), Singapore, Singapore, 2019, pp. Page 1-Page 4.

• "NIST’s Fully Dynamic Gravimetric Liquid Flowmeter Standard", Jodie G. Pope, Aaron N. Johnson, James B. Filla, Joey T. Boyd, Christopher J. Crowley, and Vernon E. Bean; Proceeding of the International Symposium on Fluid Flow Measurement, Arlington, VA, 2015.

• "Design and Capabilities of NISTs Scale-Model Smokestack Simulator", Aaron N. Johnson; Joey T. Boyd; Eric Harman; Mohammad M. Khalil; Jacob E. Ricker; Christopher J. Crowley; Rodney A. Bryant; Iosif I. Shinder; Proceedings of 9th International Symposium on Fluid Flow Measurement, Arlington, VA, 2015.

• "Calibrations of Multi-holed Pitot Tubes Depend on Turbulence", I.I.Shinder, C.J.Crowley, M.R.Moldover; Proceeding of the MSC 2012, Pasadena, California.

•  "Improvements To NIST’s Air Speed Calibration Service", Iosif I. Shinder, Christopher J. Crowley, B. James Filla, Michael R. Moldover; Proceeding of the Flomeko 2013, Paris, France.

• "Computer Simulation for Flow Hysteresis during Multi-hole Pitot Tube Calibration", Hsin-Hung Lee, Iosif I. Shinder, Christopher J. Crowley, John D. Wright, Michael R. Moldover; Proceeding of the 20th National Computational Fluid Dynamics Conference 2013, Nantou, Taiwan.

• "Removing the Hydrocarbon Liquid from Hydrocarbon liquid Flow Standards", Jodie G. Pope and Christopher Crowley; Proceedings of the 16th International Flow Measurement Conference FLOMEKO, 2013.

• "Improved Nozzle Manifold for Gas Flow Calibrations", Aaron N. Johnson, Chunhui Li, John D. Wright, Gina M. Kline, and Christopher J. Crowley; Proceeding of the International Symposium on Fluid Flow Measurement, Colorado Springs CO, 2012.

Unpublished articles:

  A short numerical investigation of the dynamic stability of an inverted pendulum. This article was written as a class project for Statistical Mechanics II taught by Prof. Kurt Wiesenfeld in 2014.

  A short numerical look at the synchronization of Anticonformist Populations. This article was written as a class project for Statistical Mechanics II taught by Prof. Kurt Wiesenfeld in 2014.

Memberships & Committees

• Graduate Association of Physicists, Founding President 

• American Physical Society 

• American Association for the Advancement of Science