Research Interests

​Research interests include turbulent spray combustion at atmospheric and high pressures. In addition, it includes understanding the physics of thermocoustic instabilities in a backward facing step, bluff body combustors and its interactions with hydrodynamic oscillations with focus on intermittent oscillations aimed at its control. Measurements based on Laser based diagnostics such as 2C-, 3C- and time resolved PIV, PLIF, LII and LDV/PDPA of the reacting and non-reacting flows. Application of spatio-temporal data processing tools such as Proper orthogonal decomposition (POD) and dynamic mode decomposition methods (DMD), Lagrangian Coherent structures (LCS) to the spatio-temporal data, linear/non-linear signal analysis and dynamical system based time series analysis.


Selected Publications

  • Proper orthogonal and dynamic mode decomposition of time-resolved PIV of confined backward-facing step flow
    R. Sampath, and S.R. Chakravarthy
    Experiments in Fluids 55, 1792-1808, (2014)
  • Dynamics and diagnostics of flame-acoustic interactions
    S.R. Chakravarthy, R. Sampath and V. Ramanan
    Combustion Science and Technology 189, 395-437, (2015)
  • Investigation of combustion oscillations of premixed dump combustor using Time-resolved particle image velocimetry
    R. Sampath, and S.R. Chakravarthy
    Combustion and Flame 172,309325, (2016)
  • Lagrangian coherent structures during combustion instability in a premixed-flame backward-step combustor
    R. Sampath, M. Mathur, and S.R. Chakravarthy
    Physical Review E 94, 062209, (2016)
  • Acoustic Reynolds stress: The source of coherent structures during combustion instability
    C. Balaji, A. Kannan, R. Sampath, and S.R. Chakravarthy
    Part III-Combustion of Fuels and Engine Performance, in Agarwal, A.K., Pandey, A..., (2014)

Education Profile

  • ​Ph.D. (M.S integrated), Aerospace Engg., Indian Institute of Technology, Madras, India, 2017
  • B.E., Mechanical Engg., MNM Jain Engg. college (Affl. Anna University), Chennai, India, 2007


Professional Profile

  • 2017-Present: Postdoctoral Fellow, King Abdullah University of Science and Technology, KAUST
  • ​2016-2017: Senior Project officer, National Centre for Combustion Research and Development (NCCRD) and Centre of Propulsion Technology (CoPT), IIT Madras, India

KAUST Affiliations

  • ​Clean Combustion Research Center (CCRC)
  • Division of Physical Sciences and Engineering (PSE)