Research Interests
Hydropower, CFD and FEM, Turbines and Rotating Machinery, Experimental Methods, Fluid-Structure Interaction, Multiphase Flows, Quantitative Analysis of Flow, Cavitation, Cavitation-Erosion, Cavitation-Silt Erosion, Erosion Resistive Coatings, Hydrodynamic Supercavitation, Offshore Wind Turbines (Floating and Fixed), Acoustics, Cavitation Based Biomedical Technology, Hydrodynamics, Bubble Dynamics, Laser Induced Cavitation Bubbles, Cavitation Bubble Dynamics
BioSketch
• Assistant Professor
18 Dec 2023 - Present
Dept. of Hydro and Renewable Energy (HRED), IIT Roorkee, Roorkee, Uttarakhand, India
• Joint Faculty
05 May 2025 - Present
Department of Water Resource Development and Management (WRDM), India
• Research Group Leader (Multiphase Flow)
01 Sep 2021 - 18 Dec 2023
Faculty of Mechanical and Process Engineering, University of Duisburg-Essen, Germany, Germany
• Postdoctoral Fellow / Foreign Expert
01 Jan 2019 - 31 Jul 2021
College of Ship Building, Harbin Engineering University, Harbin, Heilongjiang, China, China
• Graduate Research Assistant
15 Oct 2013 - 31 Mar 2017
University of Duisburg-Essen, Duisburg, North Rhein-Westphalia, Germany, Germany
• Executive Trainee Engineer
24 Jun 2011 - 29 Feb 2012
Greaves Cotton Limited, Pune, Maharashtra, India, India
Research
• Effects of phase transition and thermodynamics on the dynamics of cavitation bubbles collapsing near a solid boundary and the associated 3D flow
2026
Udo Lantermann a , Gohar Moloudi, Mazyar Dawoodian , Hemant J. Sagar, Ould el Moctar | Elsevier (DOI: 10.1016/j.ultsonch.2026.107894)
Journal: Ultrasonics Sonochemistry Pages: 107894 , Volumes: 130 ,
• A Comprehensive Review on Real-Time Performance Assessment & Operational Fault Monitoring in Hydromachinery
2026
Juhi Padma and Hemant J. Sagar | IOP Science (DOI 10.1088/1755-1315/1659/1/012006)
Journal: IOP Conference Series: Earth and Environmental Science Pages: 012006 , Volumes: 1659 ,
• Experimental and numerical analysis of swirling vortex flow and induced cavitation rope
2026
Chandan Kumar Kushwaha and Hemant J. Sagar | IOP Science (DOI: 10.1088/1755-1315/1659/1/012018)
Journal: IOP Conference Series: Earth and Environmental Science Pages: 012018 , Volumes: 1659 ,
• Computational Fluid Dynamics analysis and model testing for the assessment of sediment erosion on Dulhasti power station Francis turbine runner
2026
Junaid H. Masoodi, Mohammad Zehab Ud Din, I.A. Maekai, G.A. Harmain, Hemant J. Sagar, Mudasir Akbar Shah | Elsevier (DOI: 10.1016/j.flowmeasinst.2026.103284)
Journal: Flow Measurement and Instrumentation Pages: 103284 , Volumes: 110 ,
• A comprehensive review on condition monitoring systems for Francis turbine: Technologies, applications, and future trends
2026
Juhi Padma & Hemant J. Sagar | Elsevier (DOI: 10.1016/j.rser.2026.117468)
Journal: Renewable and Sustainable Energy Reviews Pages: 117468 , Volumes: 244 (Part A) ,
• Application of tomographic reconstruction techniques to quantify multiphase flows during sloshing model tests
2025
Simon Tödter, Hemant Sagar & et al., | Elsevier
Journal: Ocean Engineering Volumes: 317, 120034 ,
• Effects of Oscillating Curved Wall on Behavior of a Collapsing Cavitation Bubble
2024
Q.-T.- Nguyen, Hemant J. Sagar* & et al. | AIP Publishing
Journal: Physics of Fluids Volumes: 37, 013312 ,
• Bubble Theory and its Applications in Underwater Explosion, Marine Cavitation, and Seismic Exploration
2024
Runze Xu, Shiping Wang, Hemant J. Sagar & Haikun Wang | Springer (DOI: 10.1007/s11804-024-00478-3)
Journal: Journal of Marine Science and Application Pages: 255-284 , Volumes: 24 ,
• Computational Fluid Dynamics Modeling and Experiments of Two-Phase Flows
2024
Van-Tu Nguyen and Hemant J. Sagar | MDPI
Journal: Fluids Volumes: 9(9), 207 ,
• Dynamics of a cavitation bubble near an oscillating boundary
2024
Sagar H., Lin. Y. & el Moctar B. | Springer Nature
Journal: Nature Scientific Reports Volumes: 14, 22031 ,
• Dynamics of a single cavitation bubble near a cylindrical blind hole
2024
D.-W. Han, S.-H. Park, T.-N. Duy, V.-T. Nguyen, H. Sagar, O. el Moctar, T.-H. Phan, &W.-G. Park | Elsevier
Journal: Ocean Engineering Volumes: 311, 118890 ,
• Understanding cavitation bubble collapse and rebound near a solid wall
2024
V.-T. Nguyen, H. J. Sagar, O. el Moctar, and W.-G. Park | Elsevier
Journal: International Journal of Mechanical Sciences Volumes: 278, 109473, ,
• A Single Cavitation Bubble Collapse Induced Hydroelasticity Effects
2024
Sagar H. & el Moctar B. | https://doi.org/10.1016/j.jfluidstructs.2024.104131
Journal: Fluids and Structures Pages: 104313 , Volumes: 127, 104131 ,
• Dynamics of a cavitation bubble between oblique plates
2023
H. J. Sagar, B. el Moctar | https://doi.org/10.1063/5.0132098
Journal: Physics of Fluids Pages: 013324 , Volumes: 35(1) ,
• Experimental study of underwater explosions below a free surface: bubble dynamics and pressure wave emission
2023
M.-K. Li, S. Wang, and Shuai Zhang, H. J. Sagar | https://doi.org/10.1063/5.0155177
Journal: Physics of Fluids Pages: 083313 , Volumes: 35(1) ,
• Refined numerical investigation of a large equivalent shallow-depth underwater explosion
2023
He M., Zhang S., Wang S.-P., Sagar H. J. | https://doi.org/10.1063/5.0156558
Journal: AIP Advances Pages: 075016 , Volumes: 13 ,
• Experimental study of the influence of mesoscale surface structuring on single bubble dynamics
2022
Kadivar, E., el Moctar, O., Sagar, H. | https://doi.org/10.1016/j.oceaneng.2022.111892
Journal: Ocean Engineering Volumes: 260 ,
• Dynamics of a cavitation bubble near a solid surface and the induced damage
2020
H. Sagar, B. el Moctar | https://doi.org/10.1016/j.oceaneng.2022.111892
Journal: Journal of Fluids and Structures Pages: 102799 , Volumes: 92 ,
• Numerical and experimental investigation of laser-induced cavitation bubbles and induced damage
2018
Hemant J. Sagar | University of Duisburg-Essen (Germany)
Journal: PhD Dissertation (URN: urn:nbn:de:hbz:464-20181105-111935-5)
• Experimental and numerical investigation of damage on an aluminum surface by single-bubble cavitation
2018
H. J. Sagar & et. al | https://doi.org/10.1520/MPC20180038
Journal: ASTM- Materials Characterization and Performance (MPC) Pages: 985-1003 , Volumes: 7(5) ,
• 3-D numerical analysis of a laser-induced cavitation bubble near a solid boundary considering phase change
2018
Sagar H., El Moctar B. | https://doi.org/10.1080/09377255.2018.1473235
Journal: Ship Technology Research Pages: 1-17 , Volumes: 65(3) ,
• Numerical methods for prediction of cavitation-erosion
2015
Peters A., Sagar H., Lantermann U., El Moctar B. | https://doi.org/10.1016/j.wear.2015.06.009
Journal: WEAR Pages: 189-201 , Volumes: 338-339 ,
Honors And Awards
Teaching Engagements
Students
Real-Time Performance Tracking and Operational Integrity Monitoring of Hydromachinery, India
11 Jul 2024 - Present
Other Supervisors: , Scholar: Juhi
Design & Development of Low-Grade Heat Extraction System by Multi-Mode Heat Transfer, India
15 Jul 2025 - Present
Other Supervisors: , Scholar: Gaurav Kumar Chaudhary
Transient Behavior and Grid Interaction of Pumped Storage Projects, India
15 Jul 2025 - Present
Other Supervisors: , Scholar: Harshdeep Singh Rana
Removal of Microbiological Pathogens from Drinking Water, India
14 Jul 2026 - Present
Other Supervisors: , Scholar: Ruchi Gupta
Numerical modelling of cavitation, India
14 Jul 2026 - Present
Other Supervisors: , Scholar: Himanshu Narayan Choudhary
Development and Analysis of Silt-Erosion Resistant Materials and Coatings, India
14 Jul 2026 - Present
Other Supervisors: , Scholar: Amit Bhausaheb Pawar
Noise and Vibration issues in Large Hydropower Stations, India
03 Aug 2026 - Present
Other Supervisors: Prof. Thanga Raj Chelliah, Scholar: Mitesh Kumar
Flow characterization for injector-nozzle and deflector assembly, India
01 Jan 2024 - 25 May 2026
Other Supervisors: , Scholar: Ashish Rana (23568001)
Optimization of space heating system to enhance thermal comfort and energy efficiency, India
01 Jan 2024 - 25 May 2025
Other Supervisors: Prof. M.K. Singhal, Scholar: Gaurav Kumar Chaudhary (23568017)
Study of flow around Cylinder: Vortex Induced Vibration, India
01 Jan 2024 - 25 May 2025
Other Supervisors: Prof. Amit C Bhosale, Scholar: Yash Mothiya (23568014)
Environmental and Social impact assessment of small and micro hydropower plants: a comparative study of Japan and India, India
01 Jan 2024 - 25 May 2025
Other Supervisors: Prof. S.K. Prajapati, Scholar: Nikhil Chauhan (23513002)
Miscellaneous
(1) Electrosteel Award Cash Prize
Chandan Kumar Kushwaha (M.Tech. 2024-26)
for Best dissertation amongst the graduating students of M.Tech. Renewable Energy
(2) Dwarka Dass Balwant Kaur Thapar Cash Prize
Shaikh Mahammad Rafi (M.Tech. 2024-26)
for securing the second highest CGPA upto I-year.
