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R. I. Sujith

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R. I. Sujith
Sujith in his laboratory, 2023
Born
Sujith Raman Pillai Indusekharan Nair

(1967-05-11)11 May 1967
Thiruvananthapuram, India
NationalityIndian
Known forThermoacoustic instability and complex systems
TitleD. Srinivasan Institute Chair Professor
AwardsKeshav-Rangnath Excellence in Research Award (2016), Bhagya Lakshmi Krishna Iyengar Award (2015), J. C. Bose Patent Award (2013)
Academic background
Alma materGeorgia Institute of Technology Indian Institute of Technology Madras
ThesisBehavior of droplets in axial acoustic fields (1994)
Doctoral advisorBen T. Zinn
Academic work
InstitutionsIndian Institute of Technology Madras
Websitehttp://www.ae.iitm.ac.in/~sujith/

Sujith Raman Pillai Indusekharan Nair (born 11 May 1967), known as R. I. Sujith, is an Indian aerospace engineer. He is Institute Professor and the D. Srinivasan Chair Professor at the Department of Aerospace Engineering at IIT Madras.[1]

Early life

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Sujith was born on 11 May 1967 in Thiruvananthapuram, Kerala, India. He completed his Bachelor of Technology in aerospace engineering at IIT Madras. He earned his PhD in aerospace engineering on "Behavior of Droplets in Axial Acoustic Fields" working with Ben T. Zinn at the Georgia Institute of Technology from 1990 to 1994. He worked as a postdoctoral fellow in the same department from 1994 to 1995. He then joined IIT Madras as a lecturer in the Department of Aerospace Engineering.[2]

Research

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Sujith's research has been in the field of thermo-acoustic instability. He demonstrated that low-amplitude aperiodic pressure fluctuations, or combustion noise, are deterministic and chaotic.[3][4] He modelled the state of intermittency as the intermediate dynamical state as turbulent thermo-acoustic systems transition from the state of combustion noise to the state of thermo-acoustic instability.[5] He suggested that combustion noise exhibits multifractality, which vanishes with the onset of instability.[6] His analogy of the onset of oscillatory instabilities to Bose-Einstein condensation has provided universal scaling laws for various systems.[7]

Sujith's introduction of complex networks to thermo-acoustics has shown structural changes in network topology during transitions from combustion noise to instability, aiding in early detection of such transitions.[8][9] His research has involved a variety of topics relevant in thermo-acoustic systems such as the chimera states,[10] R-tipping,[11][12] synchronisation theory, amplitude death, partial amplitude death, and phase flip bifurcation.[13][14]

Honours and awards

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In 2023 he was inducted as International Member of the United States National Academy of Engineering.[15] He was selected as a fellow of the Combustion Institute in 2022,[16] and was awarded the Distinguished Fellowship of the International Institute of Acoustics and Vibration in 2021.[17] He received the J. C. Bose Fellowship in 2019[18] and the Swarnajayanti Fellowship in 2005 from the Department of Science and Technology of the Government of India.[19] He is a fellow of the Indian Academy of Sciences,[20] an associate fellow of the American Institute of Aeronautics and Astronautics, a fellow of the Indian National Academy of Engineering and an honorary fellow of the Indian Society of Systems for Science and Engineering (ISSE). He has been awarded Hans Fischer Senior Fellowship from the TUM Institute for Advanced Study in 2010. He was awarded fellowship of the Alexander von Humboldt Foundation[21] in 2000. He was the editor-in-chief of the International Journal of Spray and Combustion Dynamics from 2009 to 2015. He is currently a member of the editorial advisory board of Chaos: An Interdisciplinary Journal of Nonlinear Science.[22]

References

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  1. ^ "IIT Madras Prof RI Sujith From Elected To US National Academy Of Engineering". www.thehawk.in. Retrieved 3 June 2025.
  2. ^ "Prof. R. I. Sujith". www.ae.iitm.ac.in. Retrieved 29 May 2025.
  3. ^ Tony, J.; Gopalakrishnan, E. A.; Sreelekha, E.; Sujith, R. I. (2 December 2015). "Detecting deterministic nature of pressure measurements from a turbulent combustor". Physical Review E. 92 (6): 062902. Bibcode:2015PhRvE..92f2902T. doi:10.1103/PhysRevE.92.062902. PMID 26764769.
  4. ^ Nair, Vineeth; Thampi, Gireehkumaran; Karuppusamy, Sulochana; Gopalan, Saravanan; Sujith, R. I. (December 2013). "Loss of Chaos in Combustion Noise as a Precursor of Impending Combustion Instability". International Journal of Spray and Combustion Dynamics. 5 (4): 273–290. doi:10.1260/1756-8277.5.4.273.
  5. ^ Nair, Vineeth; Thampi, Gireeshkumaran; Sujith, R. I. (October 2014). "Intermittency route to thermoacoustic instability in turbulent combustors". Journal of Fluid Mechanics. 756: 470–487. Bibcode:2014JFM...756..470N. doi:10.1017/jfm.2014.468. ISSN 0022-1120. S2CID 122023113.
  6. ^ Nair, Vineeth; Sujith, R. I. (May 2014). "Multifractality in combustion noise: predicting an impending combustion instability". Journal of Fluid Mechanics. 747: 635–655. Bibcode:2014JFM...747..635N. doi:10.1017/jfm.2014.171. ISSN 0022-1120. S2CID 124390563.
  7. ^ Tandon, Shruti; Sujith, R. I. (1 April 2021). "Condensation in the phase space and network topology during transition from chaos to order in turbulent thermoacoustic systems". Chaos: An Interdisciplinary Journal of Nonlinear Science. 31 (4): 043126. Bibcode:2021Chaos..31d3126T. doi:10.1063/5.0039229. ISSN 1054-1500. PMID 34251230. S2CID 234819616.
  8. ^ Murugesan, Meenatchidevi; Sujith, R. I. (June 2015). "Combustion noise is scale-free: transition from scale-free to order at the onset of thermoacoustic instability". Journal of Fluid Mechanics. 772: 225–245. Bibcode:2015JFM...772..225M. doi:10.1017/jfm.2015.215. ISSN 0022-1120. S2CID 124804329.
  9. ^ Krishnan, Abin; Sujith, R. I.; Marwan, Norbert; Kurths, Jürgen (June 2021). "Suppression of thermoacoustic instability by targeting the hubs of the turbulent networks in a bluff body stabilized combustor". Journal of Fluid Mechanics. 916: A20. Bibcode:2021JFM...916A..20K. doi:10.1017/jfm.2021.166. ISSN 0022-1120. S2CID 233215294.
  10. ^ Mondal, Sirshendu; Unni, Vishnu R.; Sujith, R. I. (January 2017). "Onset of thermoacoustic instability in turbulent combustors: an emergence of synchronized periodicity through formation of chimera-like states". Journal of Fluid Mechanics. 811: 659–681. Bibcode:2017JFM...811..659M. doi:10.1017/jfm.2016.770. ISSN 0022-1120. S2CID 125934181.
  11. ^ Tony, J.; Subarna, S.; Syamkumar, K. S.; Sudha, G.; Akshay, S.; Gopalakrishnan, E. A.; Surovyatkina, E.; Sujith, R. I. (14 July 2017). "Experimental investigation on preconditioned rate induced tipping in a thermoacoustic system". Scientific Reports. 7 (1): 5414. Bibcode:2017NatSR...7.5414T. doi:10.1038/s41598-017-05814-y. ISSN 2045-2322. PMC 5511272. PMID 28710448.
  12. ^ Pavithran, Induja; Midhun, P. R.; Sujith, R. I. (1 August 2023). "Tipping in complex systems under fast variations of parameters". Chaos: An Interdisciplinary Journal of Nonlinear Science. 33 (8). arXiv:2209.06747. Bibcode:2023Chaos..33h1105P. doi:10.1063/5.0162503. ISSN 1054-1500. PMID 38060796. S2CID 252222536.
  13. ^ Manoj, Krishna; Pawar, Samadhan A.; Sujith, R. I. (2 August 2018). "Experimental Evidence of Amplitude Death and Phase-Flip Bifurcation between In-Phase and Anti-Phase Synchronization". Scientific Reports. 8 (1): 11626. Bibcode:2018NatSR...811626M. doi:10.1038/s41598-018-30026-3. ISSN 2045-2322. PMC 6072762. PMID 30072725.
  14. ^ Dange, Suraj; Manoj, Krishna; Banerjee, Subham; Pawar, Samadhan A.; Mondal, Sirshendu; Sujith, R. I. (1 September 2019). "Oscillation quenching and phase-flip bifurcation in coupled thermoacoustic systems". Chaos: An Interdisciplinary Journal of Nonlinear Science. 29 (9). Bibcode:2019Chaos..29i3135D. doi:10.1063/1.5114695. ISSN 1054-1500. PMID 31575137. S2CID 203639549.
  15. ^ "IIT Madras professor elected to U.S. National Academy of Engineering". The Hindu. 13 February 2023. Retrieved 22 August 2023. ...Prof Sujith is the second Indian to be elected to the aerospace section of the Academy.
  16. ^ "2022 Class of Fellows". The Combustion Institute | Promoting and disseminating combustion science research. Retrieved 5 September 2023. For highly original applications of dynamical systems and complex systems theory to the analysis and control of thermoacoustic combustion instabilities.
  17. ^ U Tejonmayam (3 November 2021). "IIT-Madras professor wins IIAV fellowship". The Times of India. Retrieved 5 September 2023. ...is awarded to individuals with distinguished careers in acoustics vibration.
  18. ^ "National Fellows". Retrieved 5 September 2023.
  19. ^ "SwarnaJayanti Fellowship Awards For the Year 2005-2006" (PDF). Retrieved 5 September 2023.
  20. ^ "Fellow of the Indian Academy of Sciences". Retrieved 5 September 2023.
  21. ^ "Alexander Von Humboldt Fellowship". Retrieved 5 September 2023.
  22. ^ "CHA - Advisory Board | Chaos: An Interdisciplinary Journal of Nonlinear Science | AIP Publishing".
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