Dr. Venkatramani Jagadish | Department of Mechanical Engineering

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Dr. Venkatramani
Jagadish
Assistant Professor
Department of Mechanical Engineering
School of Engineering (SE)
j.venkatramani@snu.edu.in
C121B, Shiv Nadar University
India
Profile Summary 

Hello! Welcome to my department webpage. I'm Dr. Venkatramani and I work in the broad areas of fluid-structure interactions, nonlinear dynamics, and vibration-based energy harvesting. I obtained my undergraduate degree in Mechanical Engineering from SRM University, Chennai. Subsequently, I joined "The Uncertainty lab" in the Department of Applied Mechanics, IIT-Madras as a project associate. I worked there on a sponsored project with Prof. Sayan Gupta (https://home.iitm.ac.in/sayan/). Later, in 2012, I joined the same lab for a direct Ph.D. with Prof. Sayan as an advisor and Prof Sunetra Sarkar (https://home.iitm.ac.in/sunetra/) from the Department of Aerospace Engineering as a co-advisor. I worked on broad aspects of aeroelasticity involving wind tunnel experiments, numerical simulations, use of nonlinear dynamics paradigms, and developed practicable outcomes using time series analysis.

I submitted my Ph.D. thesis (for the award of MS and Ph.D. - under the IIT-M direct Ph.D. scheme) in July 2017 and immediately joined SNU as an assistant professor - which I am till date. As an outcome of my publications and citations in this field, I serve as a reviewer for highly reputed journals, such as Journal of Fluids and Structures (JFS), Journal of Sound and Vibration (JSV), Communications in Nonlinear Science and Numerical Simulations, Smart Materials and Structures, Nonlinear Dynamics etc (select journals only mentioned here).

Educational Qualifications 
2018
(Direct) Ph.D. in Applied Mechanics
Indian Institute of Technology Madras
2018
MS in Applied Mechanics (as a part of my Direct Ph.D.)
Indian Institute of Technology Madras
2011
B Tech in Mechanical Engineering
SRM University
Work Experience 
07/11
11/11
Project Associate,
Indian Institute of Technology Madras
07/17 – Present
Assistant Professor,
Department of Mechanical Engineering, School of Engineering, Shiv Nadar University, Delhi-NCR
I currently work here
Teaching & Research Interests: 

My research interests are in the following broad areas. Vibrations and Nonlinear Dynamics, Aeroelasticity, and Energy Harvesting from Vibrating Structures. Recently, I have started working on human voice production from the purview of non-smooth nonlinear dynamical systems. More details pertaining to my work can be found in my Google Scholar page https://scholar.google.com/citations?user=s8reLtcAAAAJ&hl=en

Presently, I collaborate with:

1) Dr. P.V. Malaji for energy harvesting problems

2) Dr. Sirshendu Mondal for synchronization problems

3) Dr. Chandan Bose for dynamic stall and allied FSI problems

4) Prof. Jaromir Horacek for problems pertaining to vocal fold dynamics

At present, there is one Ph.D. student (Dheeraj Tripathi), two master's students (Ashwad Raaj and Arvind Raj), and a Junior Research Fellow (Sai Vishal Reddy) in my group.

Those interested in the above areas are encouraged to contact me or my students for further details.

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I so far have taught both conventional and unconventional genres of courses. I, year after year, handle "mechanics of solids" in the monsoon semester for undergraduate students and is one of my highest rated courses. I offer "mechanical vibrations" as an undergraduate elective in spring semesters and is an equally well-rated course. I occasionally teach undergraduate core courses like Engineering Mechanics and Kinematics of Machinery as well.

For the graduate students, I have so far taught "research methodology", "Dynamics and Vibrations", "Advanced Machine Design: Theory of Elasticity", and "Fluid-Structure Interactions". I'll be offering "advanced mechanics of solids" (also called theory of elasticity) for graduate students from Monsoon semester, 2020 onwards.

 

Research Areas 
Thermo-fluids and energy systems
Computational Methods
Courses Taught(Selected) 
Dynamics and Vibration (MED523)
Statics and Dynamics (MED110)
Mechanics of Solids (MED203)
Kinematics & Dynamics of M/cs (MED204)
Mechanical Vibrations (MED320)
Awards(Selected): 
2016

Received Best paper award for presenting a paper on model free prediction of flutter instability in Structural Engineering Convention (SEC 2016) held in CSIR-SERC, Chennai.

2019 – 2021

Received start-up-research grant (SRG) from Govt. of India SERB scheme. The grant funds the experimental and theoretical aspects of my on-going research on aeroelasticity and nonlinear dynamics. Grant amount ~ Rs 19 Lacs

Scholarly Activity

Conference Publications

2021

Dheeraj Tripathi, Chandan Bose, and Venkatramani, J. Effect of system parameters on the bifurcation behavior of aeroelastic systems under coupled non-smooth nonlinearities. Online Symposium on Aeroelasticity, Fluid-Structure Interaction, and Vibrations (14-15 October 2021).
2021

Arvind Raj, Sirshendu Mondal, and Venkatramani Jagadish. Identifying route to flutter in a stochastic nonlinear aeroelastic system using recurrence networks. 2nd International Nonlinear Dynamics Conference (Nodycon 2021). To be held virtually.
2021

Sai Vishal, Ashwad Raaj, Chandan Bose, and J Venkatramani. Parametric investigation into an aeroelastic system with coupled non-smooth nonlinearities using the framework of synchronization. 2nd International Nonlinear Dynamics Conference (Nodycon 2021). To be held virtually.
2021

James Emilian, Veda Samhitha Kanduri, Chandan Bose, Jaromir Horacek, J. Venkatramani. Bifurcation behavior in vocal folds and its impact on physiological conditions. 2nd International Nonlinear Dynamics Conference (Nodycon 2021). To be held virtually.
2021

Dheeraj Tripathi, Sai Vishal, Chandan Bose, and J Venkatramani. Bifurcation analysis of coupled non-smooth nonlinear aeroelastic system subjected to stochastic input fluctuations. 2nd International Nonlinear Dynamics Conference (Nodycon 2021). To be held virtually.
2020

Ashwad Raaj Paramasivam, Anindya Roy, and Venkatramani J. Energy harvesting from a pitch-plunge aeroelastic system undergoing noise-induced intermittent oscillations. Second International Symposium on Flutter and its Application (ISFA 2020), Paris, France. Conference cancelled to Covid-19 pandemic.
2018

Dharanee Dharan Mani, Ramesh Gupta Burela and Venkatramani, J., Acoustic energy harvesting using piezoelectric device from random ambient noise. 14th International Conference on Vibration Engineering and Technology of Machinery (VETOMAC XIV), Lisbon, Portugal, September 10-13, 2018.
2018

Magu Raam Prasaad R and Venkatramani, J., Investigating the route to flutter in a pitch-plunge airfoil with freeplay nonlinearity subjected to input flow fluctuations. 14th International Conference on Vibration Engineering and Technology of Machinery (VETOMAC XIV), Lisbon, Portugal, September 10-13, 2018.
2018

Ashwad Raaj Paramasivam, Pradeep Malaji and Venkatramani, J., Investigating the energy harvesting potential of a nonlinear dynamical oscillator subjected to random excitations. 14th International Conference on Vibration Engineering and Technology of Machinery (VETOMAC XIV), Lisbon, Portugal, September 10-13, 2018.
2018

Rajagopal Vinod Bethi, Sai Vishal Reddy Galli and Venkatramani, J., Identifying route to stall flutter through stochastic bifurcation analysis. 14th International Conference on Vibration Engineering and Technology of Machinery (VETOMAC XIV), Lisbon, Portugal, September 10-13, 2018.
2016

Venkatramani, J., Gupta, S., Sarkar, S., A model free approach to forewarning flutter instability using entropy measures. Structural Engineering Convention (SEC), CSIR-SERC Chennai, December 13-15, 2016.
2016

Venkatramani, J., Krishna Kumar, S., Gupta, S., Sarkar, S. The physics of intermittency route to aeroelastic flutter. 11th Flow Induced Vibration Conference (FIV), The Hague-Netherlands, July 4-6, 2016.
2016

Venkatramani, J., Gupta, S., Sarkar, S. Numerical investigations on intermittency route to aeroelastic flutter. Procedia Engineering (2016), DOI 10.106/j.proeng.2016.05.125.
2014

Venkatramani, J., Patel, N.H., Gupta, S., Sarkar, S., Nonlinear dynamical analysis of an airfoil subjected to non-Gaussian wind. International Congress on Theoretical, Applied and Experimental Mechanics (ICTACEM), IIT-Kharagpur, December 29-31, 2014.
2013

Venkatramani, J., Chhajed, S., Gupta, S., Development of LMA models for gusty loads on airfoil and response analysis. 11th International Conference on Vibration Problems (ICOVP), Lisbon, September 9-13, 2013.

Journal Publications (accepted or published)

2021

Sai Vishal, Ashwad Raaj, Chandan Bose and, Venkatramani J. Synchronization characteristics of a pitch-plunge airfoil with free-play nonlinearity under dynamic stall condition. International Journal of Non-Linear Mechanics.  https://doi.org/10.1016/j.ijnonlinmec.2021.103766
2021

Ashwad Raaj Paramasivam, Venkatramani Jagdish, and Sirshendu Mondal. Investigating amplitude death in a coupled nonlinear aeroelastic system. International Journal of Nonlinear-Mechanics, Volume 129, March 2021, 103659

https://doi.org/10.1016/j.ijnonlinmec.2020.103659
2020

Bethi, R.V., Gali, S.V., and Venkatramani, J., 2020. Response analysis of a pitch–plunge airfoil with structural and aerodynamic nonlinearities subjected to randomly fluctuating flows. Journal of Fluids and Structures, 92, p.102820.
https://doi.org/10.1016/j.jfluidstructs.2019.102820
2019

Raaj, A., Venkatramani, J., and Mondal, S., 2019. Synchronization of pitch and plunge motions during intermittency route to aeroelastic flutter. Chaos: An Interdisciplinary Journal of Nonlinear Science, 29(4), p.043129. Citations - 05. https://doi.org/10.1063/1.5084719
https://doi.org/10.1063/1.5084719
2018

Venkatramani, J., Sarkar, S., Gupta, S. Investigations on precursor measures for aeroelastic flutter. Journal of Sound and Vibration 419, 318-336. Citations - 14.

https://doi.org/10.1016/j.jsv.2018.01.009
2018

Venkatramani, J., Gupta, S., Sarkar, S. Intermittency in pitch-plunge aeroelastic systems explained through stochastic bifurcations. Nonlinear Dynamics (2018), https://doi.org/10.1007/s11071-018-4121-5. Citations - 12. https://doi.org/10.1007/s11071-018-4121-5
2017

Venkatramani, J., Krishna Kumar, S., Gupta, S., Sarkar, S. Physical mechanism of intermittency route to aeroelastic flutter. Journal of Fluids and Structures 75 (2017) 9-26. Citations - 15. https://doi.org/10.1016/j.jfluidstructs.2017.08.003
2017

Venkatramani, J., Nair, V., Sujith R.I., Gupta, S., Sarkar, S. Multifractality in aeroelastic response as a precursor to flutter. Journal of Sound and Vibration 386 (2017) 390-406. Citations - 23. https://doi.org/10.1016/j.jsv.2016.10.004
2016

Venkatramani, J., Nair, V., Sujith R.I., Gupta, S., Sarkar, S. Precursors to flutter instability by an intermittency route: A model-free approach. Journal of Fluids and Structures 61 (2016) 376–391. Citations - 32.https://doi.org/10.1016/j.jfluidstructs.2015.11.015

Books & Book Chapters

2020

Venkatramani, J., Sarkar, S., and Gupta, S., 2020. Intermittency in a Pitch-Plunge Aeroelastic System. In Dynamics and Control of Energy Systems (pp. 171-194). Springer, Singapore. Citations - 02. https://doi.org/10.1007/978-981-15-0536-2_8
Intermittency in a Pitch-Plunge Aeroelastic System

2020

Parvathaneni, A., Sharma, D., Vashishtha, D., Malaji, P.V. and Venkatramani, J., Investigations into Nonlinear Energy Sinks for a Stochastic Dynamical Oscillator. Trends in Manufacturing and Engineering Management, pp.963-976. (Springer).

2020

Santhakumar, N., Singh, D. and Jagadish, V., Investigating the Route to Flutter in a Pitch–Plunge Airfoil Subjected to Combined Flow Fluctuations. Trends in Mechanical and Biomedical Design, pp.369-378. (Springer).

2020

Kanduri, V.S., Emilian, J. and Jagadish, V., Fatigue Analysis of Vocal-Folds Using Discretized Aeroelastic Model. Trends in Mechanical and Biomedical Design, pp.179-187. (Springer)

Patent

2015

Venkatramani, J., Nair, V., Sujith R.I., Gupta, S., Sarkar, S. Setup and methodology for early detection of aeroelastic instabilities. Patent (4273/CHE/2014). Complete filing done on 25th August 2015, India.

Journal Publications (submitted)

2021

Sai Vishal, Ashwad Raaj, Chandan Bose, Venkatramani J, Grigorios Dimitriadis. Numerical investigations into discontinuity-induced bifurcations in an aeroelastic system with coupled non-smooth nonlinearities. Under Review in Nonlinear Dynamics. (June 2021).
2021

Dheeraj Tripathi; Sai Vishal; Chandan Bose; Venkatramani Jagadish. Stall-induced fatigue damage analysis of nonlinear aeroelastic systems subjected to randomly fluctuating inflow. Under review in Mechanical Systems and Signal Processing (Elsevier).
2021

Arvind Raj, Ashwad Raaj, J. Venkatramani, and Sirshendu Mondal. Effect of parameter mismatch and dissipative coupling on amplitude death regime in a coupled nonlinear aeroelastic system. Under Review in Chaos: An Interdisciplinary Journal of Nonlinear Science (AIP).