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Faculty details

Prof.Ramanababu Kaligatla

Designation: Associate Professor

Department: Mathematics & Computing

Email: ramana[at]iitism[dot]ac[dot]in

Contact Number: 8227896049

Office Number: +91-326-223-5183

Personal Page: Under Construction

About Me: I am currently an Associate Professor in the Department of Mathematics and Computing. I joined this institute in December 2014. Prior to this, I worked as a postdoctoral fellow in the Department of OENA at IIT Kharagpur. I obtained my PhD in Mathematics from IIT Madras in November 2013 and my MSc from the University of Hyderabad, Hyderabad. My teaching focuses on applied mathematics courses, namely Engineering Mathematics, Differential Equations, Numerical Methods, and Methods of Applied Mathematics.

Research Interest: Specialization: Differential And Integral Equations, Wave-Structure Interactions----- I am interested in developing semi-analytical methods for studying the scattering of water waves by barriers (breakwaters). The relevant mixed-boundary value problems involve elliptic partial differential equations subject to mixed boundary conditions and far-field conditions. The solution methods include separation of variables, integral equations, Green's functions, and variational principles. My objectives are to analyze wave reflection and transmission coefficients, wave forces, and other important physical quantities to understand the wave-scattering performance of barriers and wave behavior.

Curriculum
Vitae
Publications

Teaching

  • Engineering Mathematics
  • Ordinary and Partial Differential Equations
  • Methods of Applied Mathematics
  • Numerical Methods
  • Integral Equations
  • Calculus Variations

Academics

Ph.D. in Mathematics, Indian Institute of Technology Madras, 2013.

Thesis Supervisor: Prof. S. R. Manam

M.Sc., Applied Mathematics, University of Hyderabad, Hyderabad, 2007.

B.Sc., Andhra University, Visakhapatnam, 2004.

 

Position

Organisation

Designation

Level

Period

IIT (ISM) Dhanbad

Associate Professor

Level 13A2

Since 13.04.2022 to till date

                     Assistant Professor

Level 13A1

18.12.2020 to 12.04.2022

8000 AGP (or) Level 12

18-12-2017 to 17.12.2020

7000 AGP

18-12-2015 to

17-12-2017

6000 AGP

18-12-2014 to

17-12-2015

IIT Kharagpur

Post-Doctoral Fellow

27-03-2014 to 16-12-2014

ISI Kolkata

Visiting Scientist

01-02-2014 to 28-02-2014

Awards and Honors

Publications

List Of Research Publications (only in Peer-reviewed Journals)

[27] S. Singh, R. B. Kaligatla, B.N. Mandal, Water wave propagation in the presence of a U-shaped barrier, Fluid Dynamics, 2026 (Accepted). 

[26] R.B. Kaligatla, P. Panja, B.N. Mandal, Wave interaction with an H-shaped submerged breakwater. The ANZIAM Journal,  2025 (Accepted).

[25] S. Singh, S., R.B. Kaligatla, B.N. Mandal, Wave scattering by ⊓-shaped breakwaters in finite depth water. Applied Ocean Research, 148 (2024).

[24] R.B. Kaligatla, S. Singh, B.N. Mandal, Wave scattering by Pi-type breakwater f loating in deep water. Journal of Engineering Mathematics 143 (2023).

[23] R.B. Kaligatla, N.M. Prasad, Topographical effects on wave scattering by an elastic plate floating on two-layer fluid. Mathematical Modelling and Analysis, 29 (2024).

[22] R.B. Kaligatla, S. Singh, Wave interaction with a rigid porous structure un der the combined effect of refraction-diffraction. Ocean Engineering 283 (2023) 115042.

[21] S. Singh, R.B. Kaligatla, The combined refraction-diffraction effect on wa ter wave scattering by a vertical flexible-porous structure. Journal of Fluids and Structures, 116 (2023) 103791.

[20] R.B. Kaligatla, S. Tabssum, T. Sahoo, Surface gravity wave interaction with a partial porous breakwater in a two-layer ocean having bottom undulations. Waves in Random and Complex Media (2021), doi.org/10.1080/17455030.2021.1976878.

[19] N. Prasad, R.B. Kaligatla, S. Tabssum, Wave interaction with an array of porous walls in a two-layer ocean of varying bottom topography, Meccanica (2021), doi.org/10.1007/s11012-021-01327-1.

[18] R.B. Kaligatla, Manisha Sharma, T. Sahoo, Wave interaction with a pair of submerged floating tunnels in the presence of an array of submerged porous breakwaters, Journal of Offshore Mechanics and Arctic Engineering (ASME) 143 (2021) 21402(1-14)

[17] S. Tabssum, R.B. Kaligatla, T. Sahoo, Surface gravity wave interaction with a partial porous breakwater in the presence of bottom undulation, Journal of En gineering Mechanics (ASCE) 146(9) (2020) 04020088(1-18).

[16] Manisha, R.B. Kaligatla, T. Sahoo, Wave interaction with a submerged float ing tunnel in the presence of a bottom mounted submerged porous breakwater Applied Ocean Research 96 (2020) 102069(1-12).

[15] S. Tabssum, R.B. Kaligatla, T. Sahoo, Gravity wave interaction with a porous breakwater in a two-layer ocean of varying depth, Ocean Engineering 196 (2020) 106816(1-15).

[14] R.B. Kaligatla, N. Prasad, S. Tabssum, Oblique interaction between water waves and a partially submerged rectangular breakwater, Proceedings of the In stitution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment (SAGE), 234(1)(2020) 154169.

[13] Manisha, R.B. Kaligatla, T. Sahoo, Effect of bottom undulation for mitigating wave-induced forces on a floating bridge, Wave Motion 89 (2019) 166-184.

[12] R.B. Kaligatla, S. Tabssum, T. Sahoo, Effect of bottom topography on wave scattering by multiple porous barriers, Meccanica 53 (2018) 887-903.

[11] R.B. Kaligatla, Manisha, T. Sahoo, Wave trapping by dual porous barriers near a wall in the presence of bottom undulation, Journal of Marine Science and Application, 16 (2017) 286-297.

[10] R.B. Kaligatla, S.R. Manam, Bragg resonance of membrane-coupled gravity waves over a porous bottom, International Journal of Advances in Engineering Sciences and Applied Mathematics 8 (2016) 222-237.

[9] H. Behera, R.B. Kaligatla, T. Sahoo, Wave trapping by porous barrier in the presence of step type bottom, Wave Motion 57 (2015) 219-230.

[8] R.B. Kaligatla, S. Koley, T. Sahoo, Trapping of surface gravity waves by a verti cal flexible porous plate near a wall, Journal of Applied Mathematics and Physics (ZAMP) 66 (2015) 2677-2702.

[7] S. Koley, R.B. Kaligatla, T. Sahoo, Oblique wave scattering by a vertical flexible porous plate. Studies in Applied Mathematics 135 (2015) 1-34.

[6] N.S. Vikramaditya, R.B. Kaligatla, Acoustic field in ducts with sinusoidal area variation, Journal of Vibration and Acoustics 136 (2014) 014502(1-3).

[5] R B. Kaligatla, S. R. Manam, Flexural gravity wave scattering by a nearly vertical porous wall. Journal of Engineering Mathematics 88 (2014) 49-66.

[4] S.R. Manam, R.B. Kaligatla, Membrane-coupled gravity wave scattering by a vertical barrier with a gap. The ANZIAM Journal 55 (2014) 267-288.

[3] S.R. Manam, R.B. Kaligatla, Structure-coupled gravity waves past a verti cal porous barrier, Journal of Engineering for the Maritime Environment 227(3) (2013) 266-283.

[2] S.R. Manam, R B. Kaligatla, A mild-slope model for membrane-coupled gravity waves. Journal of Fluids and Structures 30 (2012) 173-187.

[1] S.R. Manam, R.B. Kaligatla, Effect of a submerged vertical barrier on flexural gravity waves, International Journal of Engineering Science 49 (2011) 755-767.

 

Papers in conference abstract volumes / presented

[5] R.B. Kaligatla, P. Panja, B.N. Mandal., Wave interaction with rectangular breakwater with two unequal legs in oblique sea, in XII International Scientific Conference on Modern Problems of Mathematics and Mechanics, 03-06 Sep 2025, conducted by Institute of Mathematics and Mechanics, Baku, Azerbaijan. (Presented by RB Kaligatla)

[4] R.B. Kaligatla, S. Singh, Wave scattering by a partial flexible-porous breakwa ter moored in water of varying depth. 67th congress of the Indian Society of Theo retical and Applied Mechanics (ISTAM), (An International Conference) Organised by Indian Institute of Technology Mandi, Mandi, Himachal Pradesh, India from 14-16 December 2022.

[3] Manisha, R.B. Kaligatla, Wave interaction with a tunnel in a sea with bottom undulation. International Conference on Differential Equations and control Problems: Modeling, Analysis and computations held in June 17-19, 2019 at IIT Mandi, India.

[2] S. Tabssum, R.B. Kaligatla, Wave trapping by a partial porous breakwater in water of varying depth. International Conference on Applications of Fluid Dy namics held in December 13-15, 2018 at VIT, Chennai, India.

[1] S.R. ManamandR.B.Kaligatla, Effectofsurfacepiercing barriers on membrane coupled gravity waves. Advances in PDE modeling and computation, Ane Books Pvt. Ltd. (2013), 281-298.

Projects & Activities

Sponsored Research Projects (External Funded)

  • A project proposal entitled “Water wave interaction with wave-absorbing breakwaters in the presence of uneven sea bottoms” was accepted by SERB, DST, Govt. of India with the support Rs. 16,79,480 under ECR scheme in April 2018. It was ended in October 2021.

  • A project proposal “Wave scattering by new-type floating barriers in deep water” was accepted by SERB, DST, Govt. of India in December 2022 with the funding Rs. 6,60,000 under MATRICS scheme for three years.  The project was carried out from  5th Jan 2023 to 4th Jan 2026.

Membership of Scientific Societies

  • Life member of “Society of Applied Mathematics”, IIT(ISM) Dhanbad

Other Academic and Administrative Activities

1. Research Collaborators

  • Prof. Birendra Nath Mandal (Retired)
    PhD, FNASc (India), FIMA (UK), CMath (UK), FWIGB (UK)
    NASI Senior Scientist Platinum Jubilee Fellow
    Physics and Applied Mathematics Unit
    Indian Statistical Institute
    203 BT Road, Kolkata 700108, INDIA
  • Prof. Trilochan Sahoo, Dept. of Ocean Engineering and Naval Architecture, IIT Kharagpur.
  • Prof. S. R. Manam, Dept. of Mathematics, IIT Madras (PhD Supervisor).
  • Dr. S. Tabssum, Assistant Professor, Dr. Rajendra Prasad Central Agricultural University, Pusa, Bihar, India.
  • Dr. NM Prasad, Assistant Professor, Govt. Eng. College, Aurangabad. 
  • Dr. Swati Singh, Assistant Professor, Siksha 'O' Anusandhan University, Bhubaneswar, Odisha. 
  • Dr. Harekrushna Behera, SRM University, Chennai. 
  • Dr. Santanu Koley, Bits Pilani, Hyderabad Campus. 
  • Dr. N. S. Vikramaditya, National Aerospace Laboratory, Bangalore.

2. Administrate Activities 

  • Worked as an examiner for IIT (ISM) JRF examination conducted at IIT Madras from 7-11 May, 2015.
  • Working as tabulator to check student’s marks of the various subjects of UG and PG and JRF levels of Department of Applied Mathematics and BTech common courses from 2nd Nov 2015 to 30th June 2019.
  • Worked for scrutinizing the documents of candidates in connection with the M.Sc. / M.Sc. Tech. EE-2016 admission that was held on 16th July, 2016.
  • Worked as a mentor for a first year BTech batch comprising 25 students for the academic year 2017-2018.
  • Worked as a mentor for a first year BTech batch comprising 26 students for the academic year 2018-2019.
  • In charge for updating quarterly/annual progress report of the Dept. of Applied Mathematics from Sep 2018 to August 2020.
  • Member of documentation cell, Dept. of Mathematics and Computing from 6th March 2019 to March 2021.
  • In-charge of seminar and conference rooms of Dept. of M&C from June 2020 to May 2022.
  • Worked as invigilator for several central and state government examinations including JEE (Advanced 2020).
  • Member of DPGC, Dept. of Mathematics and Computing from 15th October 2020.
  • Warden of Jasper Hostel from 1st July 2021 to June 30 2023.   
  • JRF-In charge, Dept. of Mathematics and Computing, from Dec 2021 to Nov 2024.
  • Member of IIT JAM scrutiny committee for the Dept. of M&C for the academic year 2024.
  • Member of DSC for several PhD students of IIT (ISM) Dhanbad. 
  • Member of IIT JAM scrutiny committee for the academic year 2024.   
  • Member of DFSC of Dept. of Mathematics & Computing from 19th Nov 2024.
  • Question paper setter of APPGECET-2025, Andhra University, Visakhapatnam, AP State.

 

Guidance

Sl. No.

UG/PG/PhD Level

No. of Thesis (Completed)

No. of Students

(ongoing)

1

MSc

9

2

2

Int. M.Tech.

7

2

3

Ph.D.

4

3

 1. Saista Tabssum (2015DR0108)

Thesis defence date: 07.07.2021

Thesis title: Mild-slope approximation and allied methods for surface gravity wave scattering by porous breakwaters in the presence of seabed undulations.

Present Position:  Assistant Professor, Dr. Rajendra Prasad Central Agricultural University, Pusa, Bihar, India.

2. Manisha (2015DR0113)

Thesis defence date: 12.11.2021

Thesis title: Mild-slope approximation and allied methods for wave interaction with floating and submerged structures in the presence of sea-bed undulations.

Present Position:  Assistant Professor, ABESIT, Ghaziabad, Uttar Pradesh, India

3. Nagmani Prasad (2016DR0060)

Thesis defence date: 16.08.2022

Thesis title: Wave interaction with permeable and impermeable structures in the presence of non-uniform seabed topography.

Present Position: Assistant Professor, Govt. Eng. College, Aurangabad, Bihar, India.

4. Swati Singh (2019DR0187)

Thesis defence date: 06.11.2024

Thesis title: A semi-analytical study on wave scattering by breakwaters

Present Position: Assistant Professor, Siksha 'O' Anusandhan University,  Odisha, India.

 

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