Research Interests
CFD and FEM, Turbines and Rotating Machinery, Experimental Methods, Hydropower, Fluid-Structure Interaction, Multiphase Flows, Quantitative Analysis of Flow, Cavitation, Cavitation-Erosion, Cavitation-Silt Erosion, Erosion Resistive Coatings, Hydrodynamics Supercavitation, Offshore Wind Turbines (Floating anf Fixed), Acoustics, Cavitation Based Biomedical Technology, Hydrodynamics, Bubble Dynamics, Laser Induced Cavitation Bubbles, Cavitation Bubble Dynamics
BioSketch
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
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
Journal: Journal of Marine Science and Application
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
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
