Dr. Santu Das

I am an applied mathematician working on water wave mechanics. My research interest includes the following topics:

  1. Hydroelasticity, flexural-gravity waves
  2. Fluid-structure interaction
  3. Flow-through porous medium
  4. Poroelasticity and viscoelasticity
  5. Wave blocking, dead water analogue
  6. Wave scattering, damping, and trapping

Currently, I am working on the following topics:

  1. Acoustic-gravity waves propagation in the ocean.
  2. Indian Summer Monsoon Rainfall (ISMR) prediction using AI & ML techniques, new preditor discovery, and to capture non-linearity.
  3. Flexural gravity wave blocking in the presence of high compressive force and associated wave-structure interaction problems.
  4. Effect of elastic ocean beds on hydroelastic wave blocking.
  5. Effect of wave blocking in trapped modes.
 

Education

  1. BSc in Mathematics, University of Calcutta, 2004-2007
  2. MSc in Mathematics and Computing, IIT Guwahati, 2007-2009
  3. Ph.D. in Mathematics, IIT Guwahati, 2009-2014

Professional Life

  1. Institute Postdoctoral Fellow, IIT Kharagpur, Feb 2015-July 2017.
  2. Assistant Professor in Mathematics, SRM University AP – Amaravati, July 2017-May 2018
  3. Assistant Professor in Mathematics, IIIT Bhagalpur, July 2018-June 2019
  4. Assistant Professor in CCNS, IASST Guwahati, July 2019-Present

Membership of Professional Bodies – Life member of ISTAM (2019-present)

Invited Talk:

  1. Flexural gravity waves in marine science and technology, Alumnus Reflection, 21st October 2016, Department of Mathematics, Indian Institute of Technology Guwahati, Guwahati-781039, India.
  2. Some remarkable phenomena in flexural gravity waves, 22nd June 2017, Department of Naval Architecture and Ocean Engineering, Seoul National University, Seoul-08826, South Korea.
  3. Few spectacular aspects of flexural-gravity waves: from sea-ice to analogue gravity, and deadwater, 18th June 2019Department of Mathematics, Indian Institute of Technology Guwahati, Guwahati-781039, India.
  4. Blocking dynamics of flexural-gravity modes, workshop on Time domain analysis on hydroelasticity problems, 9-13 December 2019, Department of Ocean Engineering and Naval Architecture, IIT Kharagpur, Kharagpur – 721302, India
  5. Very Large Floating Structure (VLFS) in Oceans - It's History, Present Status and Significance in Future, in ATAL Faculty Development Programme on Mathematical Modelling of Problems in Coastal and Offshore Engineering,16th September 2020, Department of Mathematics, Indian Institute of Technology Guwahati, Guwahati-781039, India.
  6. The Genesis of Negative Energy Waves in Hydrodynamics, in Alumni Symposium on Mathematics and Computing (ASMC 2020), 19th September 2020, Department of Mathematics, Indian Institute of Technology Guwahati, Guwahati-781039, India.
  7. Acoustic-gravity wave (AGW) propagation under sea-ice in an ocean having elastic floor, 14th October 2020, in minisymposium on Mathematical Aspects of Water Waves and Applications, Department of Mathematics, Indian Institute of Technology Guwahati, Guwahati-781039, India.
  8. Introduction to water compressibility and its effect on hydroelastic wave, 16 December 2021, in the short-term course Non-linear problems in hydroelasticity (13-17 December 2021) organized by Dept. of Ocean Engineering and Naval Architecture, IIT Kharagpur, Kharagpur - 721302, India

Workshop/Seminar/Programs attended:

  1. Water Waves and Floating Bodies, OASTC, IIT Kharagpur, India, 25-26th November 2011.
  2. National Program on Differential Equations: Theory, Computation and Applications- Advance Level Training Programme, IIT Bombay, India, 10-30th June 2012.
  3. Computational Methods in Hydroelasticity, GIAN course, IIT Kharagpur, India, 12-16th December 2016.
  4. Time domain analysis on hydroelasticity problems, 9-13 December 2019, Department of Ocean Engineering and Naval Architecture, IIT Kharagpur, Kharagpur – 721302, India,
  5. International Conference on Advances in Differential Equations and Numerical Analysis - 2020 (ADENA 2020), Department of mathematics, IIT Guwahati, India, 12-15th October 2020 (online mode).
  6. Minisymposium on Mathematical Aspects of Water Waves and Applications, Department of Mathematics, IIT Ropar (in association with IIT Guwahati), 12-15th October 2020 (online mode).
  7. Workshop on Mathematics of Sea Ice and Ice Sheets (MoSSI), CARMA - University of Newcastle, Newcastle, NSW - 2308, Australia, 9-12th November 2020 (online mode).
  8. 65th Congress of the Indian Society of Theoretical and Applied Mechanics (ISTAM 2020), GITAM Deemed to be University, Hyderabad campus, Telangana 502329, India.
  9. 36th International Workshop on Water Waves and Floating Bodies (IWWWFB-2021), Seoul National University (South Korea) during April 25-28, 2021.
  10. 2nd International Workshop in the Mathematics of Sea Ice and Ice Sheets, 10-12 November 2021, University of Southern Queensland, QLD 4350 Australia.
  11. 2nd International Workshop on Numerical and Analytical Techniques in Engineering Problems-2022, Department of Mathematics, SRM Institute of Science and Technology, Kattankulathur - 603203, India during 19-21 January 2022.

Scholarships:

  1. Summer Research Fellow: Indian Academy of Sciences – May 2008-July 2008
  2. Institute Scholarship: GATE (IITG)– July 2009-Dec 2009
  3. CSIR-JRF: Jan 2010-Dec 2011
  4. CSIR-SRF: Jan 2012-Sept 2014

Conference papers (contributory):

    1. Propagation of small amplitude waves over beds with linear and quadratic slopes, Recent Trends in Mathematical Modelling and Simulation, 18-20th March 2010, Department of Applied Mathematics, Institute of Technology, Banaras Hindu University, Varanasi – 221005, India.
    2. Reflection of ocean water waves by a vertical rectangular porous structure over an elevated horizontal bottom, 57th Congress of the Indian Society of Theoretical and Applied Mechanics, 17-20th December 2012, Defence Institute of Advanced Technology (DIAT), Girinagar, Pune- 411025, India.
    3. Wave damping by a vertical porous structure placed away from a rigid vertical wallRecent Trends in Mathematics and its Applications (RTMA-2013), 7-8th October 2013, Digboi College, Digboi, Tinsukia, Assam- 786171, India.
    4. Scattering of water waves by a vertical porous structure placed against a rigid vertical wall, 58th Congress of the Indian Society of Theoretical and Applied Mechanics, 18-21st December 2013, Bengal Engineering and Science University, Shibpur, Howrah- 711103, West Bengal, India.
    5. Flexural gravity wave motion over viscoelastic bed, National Conference on Emerging Trends in Physics of Fluids and Solids (NCETPFS2016), 3-4th March 2016, Department of Mathematics, Jadavpur University, Kolkata-700032.
    6. Flexural gravity wave motion in two-layer fluid: blocking and dead water analogue, 12th SIAM: East Asian Section Conference 2017 (EASIAM 2017), 22-25th June 2017, Department of Mathematical Sciences, Seoul National University, Seoul-08826, South Korea
    7. Flexural gravity waves in a two-layer fluid, 33rd International Workshop on Water Waves and Floating Bodies (IWWWFB – 2018), 4-7th April 2018, Ensta-Bretagne, Guidel-Plages 56520, France.
    8. Flexural gravity wave blocking in submerged and floating plate system, 63rd Congress of the Indian Society of Theoretical and Applied Mechanics, 20-23rd December 2018, School of Engineering, Dayananda Sagar University, Bangalore, India
    9. Effect of a submerged plate on flexural-gravity wave blocking, 34th International Workshop on Water Waves and Floating Bodies (IWWWFB-2019), 7-10th April 2019, Noah’s on the Beach, Newcastle, NSW 2300, Australia.
    10. Blocking dynamics of Capillary gravity waves in two-layer fluid, ANZIAM 2020, 2-6 Feb 2020, The Crowne Plaza, Hunter Valley, organised by Macquarie University, Sydney, NSW 2109, Australia
    11. The effect of compressed ice-shelves on acoustic-gravity wave (AGW) propagation in an ocean having elastic floor, Workshop on Mathematics of Sea Ice and Ice Sheets (MoSSI), 9-12th November 2020, CARMA - University of Newcastle, Newcastle, NSW - 2308, Australia (Online mode)
    12. Root finding method for the dispersion relation of waves in compressed and viscous sea ice, 65th Congress of the Indian Society of Theoretical and Applied Mechanics (ISTAM 2020), GITAM Deemed to be University, Hyderabad campus, Telangana 502329, India
    13. Sea ice and interfacial deflection within the frequency band of blocking in a stratified ocean, 2nd International Workshop in the Mathematics of Sea Ice and Ice Sheets, 10-12 November 2021, University of Southern Queensland, QLD 4350 Australia.

(JOURNALS)

2022

  1. Sunil C. Barman, Santu Das, Trilochan Sahoo* and Michael H. Meylan, Scattering of flexural-gravity waves due to a crack in a floating ice sheet in a two-layer fluid in the context of blocking dynamics, Physics of Fluids (2022), 34(5), 056602, DOI: 10.1063/5.0090073, IF: 4.98
  2. Devabrat Sharma*, Santu Das and B N Goswami, Variability and Predictability of the Northeast India Summer Monsoon Season Rainfall (Neir). Available at SSRN: https://ssrn.com/abstract=4067274 or http://dx.doi.org/10.2139/ssrn.4067274
  3. Susam Boral, Santu Das, Trilochan Sahoo* and Michael H. Meylan, Blocking dynamics of capillary-gravity waves in a two-layer fluid in the presence of surface and interfacial tensions, Meccanica (2022), 57, 1307–1335, DOI:10.1007/s11012-022-01495-8, IF: 2.538
  4. Santu Das*, Flexural-gravity wave dissipation under strong compression and ocean current near blocking point, Waves in Random and Complex Media (2022), online on 21/02/2022, DOI: 10.1080/17455030.2022.2035847, IF: 4.051
  5. Santu Das* and Michael H. Meylan, The effect of compressed ice-shelf on acoustic-gravity wave propagation in a compressible ocean having elastic bottom, Wave Motion (2022), 110, 102897, DOI: 10.1016/j.wavemoti.2022.102897, IF:2.174

2021

  1. Santu Das and Sunanda Saha*, A transit through the trapping and blocking of flexural-gravity wave: Impact of two-dimensional current and in-plane compression, Physics of Fluids (2021), 33 (11), 116603, DOI: 10.1063/5.0066115, IF: 4.98
  2. Devabrat Sharma, Santu Das and B N Goswami*, High ENSO-based 18-month lead Potential Predictability of Indian Summer Monsoon Rainfall, arXiv preprint arXiv:2106.05543, 2021
  3. Subhadra Mishra, Sunanda Saha, Santu Das and Swaroop Nandan Bora*, Reflection and damping of linear water waves by a multi-porosity vertical porous structure placed on a step-type raised seabed, Marine Systems & Ocean Technology (2021), 16, 142-156, DOI: 10.1007/s40868-021-00101-y, (IS: 1.26)
  4. Sunil C. Barman, Santu Das*, Trilochan Sahoo and Michael H. Meylan, Scattering of flexural-gravity waves by a crack in a floating ice sheet due to mode conversion during blocking, Journal of Fluid Mechanics (2021), 916, A11,DOI: 10.1017/jfm.2021.200, IF: 3.627.

2020

  1. Santu Das*, Trilochan Sahoo and Michael H. Meylan, An investigation of the properties of flexural-gravity wave propagation in a coupled submerged and floating plate system, European Journal of Mechanics-B/Fluids, (2020), 82,123-134, DOI: 10.1016/j.euromechflu.2020.03.008, IF: 2.131.

2018

  1. Santu Das*, Prakash Kar, Trilochan Sahoo and Michael H. Meylan, Flexural-gravity wave motion in the presence of shear current: wave blocking and negative energy waves, Physics of Fluids (2018), 30(10): 106606, DOI: 1063/1.5052228 , IF: 2.279.
  2. Santu Das*, Trilochan Sahoo and Michael H. Meylan, Flexural-gravity wave dynamics in two-layer fluid: blocking and dead water analogueJournal of Fluid Mechanics, (2018), 854: 121-145, DOI: 1017/jfm.2018.617IF: 2.893.
  3. Harekrushna Behera, Santu Das and Trilochan Sahoo*, Wave propagation through mangrove forests in the presence of a viscoelastic bed, Wave Motion (2018), 78: 162-175, DOI: 1016/j.wavemoti.2018.02.002, IF: 1.723.
  4. Santu Das, Trilochan Sahoo and Michael H. Meylan*Dynamics of flexural gravity waves: from sea ice to Hawking radiation and analogue gravity, Proceedings of the Royal Society of London A, (2018), 474 (2209), DOI: 1098/rspa.2017.0223 , IF: 2.410.
  5. Santu Das and Swaroop Nandan Bora*, Oblique Water Wave Damping by Two Submerged Thin Vertical Porous Plates of Different Heights, Computational and Applied Mathematics (2018), 37 (3), 3759-3779, DOI:10.1007/s40314-017-0545-7, IF: 0.863.

2017

  1. Santu Das and Trilochan Sahoo*, Hydroelastic analysis of very large floating structure over viscoelastic bed, Meccanica (2017), 52(8):1871-1887, DOI: 1007/s11012-016-0529-5IF: 2.211.

2016

  1. Santu Das, Harekrushna Behera and Trilochan Sahoo*, Flexural gravity wave motion over poroelastic bedWave Motion (2016), 63:135-148, DOI: 1016/j.wavemoti.2016.02.002IF: 1.723.

2014

  1. Santu Das and Swaroop Nandan Bora*, Damping of oblique ocean water waves by a vertical porous structure placed on a multi-step bottomJournal of Marine Science and Application (2014), 13 (4), 362-376, DOI:1007/s11804-014-1281-7SNIP: 0.808.
  2. Santu Das and Swaroop Nandan Bora*, Reflection of oblique ocean water waves by a vertical porous structure placed on a multi-step impermeable bottomApplied Ocean Research, (2014), 47: 373-385, DOI: 1016/j.apor.2014.07.001 , IF: 1.950.
  3. Santu Das and Swaroop Nandan Bora*, Reflection of oblique ocean water waves by a vertical rectangular porous structure placed on an elevated horizontal bottomOcean Engineering, (2014), 82: 135-143, DOI:1016/j.oceaneng.2014.02.035 , IF: 2.214.
  4. Santu Das and Swaroop Nandan Bora*, Wave damping by a vertical porous structure placed near and away from a rigid vertical wallGeophysical and Astrophysical Fluid Dynamics, (2014), 108 (2): 147-167, DOI:1080/03091929.2013.834051IF: 1.417.

(CONFERENCES)

  1. S. Saha*, S. Das and S. N. Bora, Time-dependent water-wave scattering by a bottom-mounted porous compound cylinder, 14th International Conference on Hydrodynamics (ICHD-2022), Wuxi (China) during 21-25 October, 2022 (accepted).
  2. S. Das* and M. H. Meylan, Time dependent motion due to sinusoidal ocean bottom oscillation, 37th International Workshop on Water Waves and Floating Bodies (IWWWFB-2022), Giardini Naxos (Italy) during April 10-13, 2022.
  3. S. Saha*, S. Das and S. N. Bora, Trapped waves within the blocking frequency under compressed sea ice and two-dimensional current, 37th International Workshop on Water Waves and Floating Bodies (IWWWFB-2021), Giardini Naxos (Italy) during April 10-13, 2022.
  4. S. Das* and M. H. Meylan, Acoustic-gravity wave generation as a result of bottom oscillation of compressible ocean, 36th International Workshop on Water Waves and Floating Bodies (IWWWFB-2021), Seoul National University (South Korea) during April 25-28, 2021.
  5. S. C. Barman*, S. Das and T. Sahoo, Energy identity for flexural-gravity wave scattering due to a crack in a floating ice sheet in two-layer fluid in the context of blocking dynamics, 36th International Workshop on Water Waves and Floating Bodies (IWWWFB-2021), Seoul National University (South Korea) during April 25-28, 2021.
  6. M. H. Meylan*, T. Sahoo and S. Das, Flexural gravity wave scattering for compressed ice, accepted in 35th International Workshop on Water Waves and Floating Bodies (IWWWFB-2020), Seoul National University (South Korea) during August 24-28, 2020
  7. S. Das*, T. Sahoo and M. H. MeylanEffect of a submerged plate on flexural-gravity wave blocking, 34th International Workshop on Water Waves and Floating Bodies (IWWWFB-2019), Newcastle (Australia) during April 7-10, 2019
  8. S. Das*, T. Sahoo and M. H. MeylanFlexural gravity waves in a two-layer fluid, 33rd International Workshop on Water Waves and Floating Bodies (IWWWFB-2018), Guidel-Plages (France) during April 4-7, 2018.

*Corresponding Author

Flexural-Gravity Waves: A Complete Theoretical Development, Role – Co-PI, Duration – 2 years, Amount – INR 70,10,645, Funding Agency – SPARC (MHRD), July 2019 – ongoing (extended till 30 September 2022).

PhD Students:

  1. Mr. Devabrat Sharma (joined in Feb 2020)
  2. Ms. Ritika Das (joined in July 2021)
  3. Mr. Lokender Singh (joined in August 2021)

Winter Internship:

  1. Mr. Pritam Das (MSc Mathematics)

OPPORTUNITIES:

The following positions are available:

  1. Master projects/Summer/winter internships in the broad area of Mathematics.
  2. JRF position for motivated students to work on applied mathematics (hydrodynamics, hydroelasticity). 

Interested persons may also directly contact me at the following address:

Dr. Santu Das

Assistant Professor – II

Mathematical and Computational Sciences Division

Institute of Advanced Study in Science and Technology

Paschim Boragaon, Garchuk, Guwahati – 781035, India

Email: santudas20072[at]gmail[dot]com / d.santu[at]iasst[dot]gov[dot]in