Dr. Virendra Kumar

Scopus Publications

Development of a comprehensive irreversible gas dynamic model for the design of the mixing section in supersonic ejectors
Devi Mutyala, P. M. V. Subbarao, Virendra Kumar
Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2026
Advancement in Composite Materials 12 for Sustainable Management of Solar PV Panel Waste
Praveen Kumar Rai, Virendra Kumar, Rajesh Kumar Verma
Hybrid Materials and Advanced Manufacturing Modern Techniques and Applications Volume II, 2026
Sustainable management of end-of-life (EoL) solar photovoltaic (PV) panels poses a major environmental and economic challenge due to their complex material makeup and rising waste volumes. Comparative studies have evaluated various recycling methods, with mechanical processes showing a slight advantage for being more eco-friendly. This research explores the transformative potential of composite materials in PV waste management, emphasizing recovery, repurposing, and integration into advanced applications. Using technologies like bio-based resins, hybrid fibers, and nano-engineered fillers, components such as glass fibers, silicon, and metals are converted into high-performance composites. Techniques like pyrolysis, solvolysis, and ultrasonic-assisted separation offer efficient, low impact recycling solutions. Case studies demonstrate the real-world utility of these composites, reinforcing their role in promoting a circular economy. Benefits include reduced emissions and conservation of key resources. Advancing innovation, sustainability, and supportive policy frameworks is essential to tackling this global issue.
Stepped single-slope solar still using MWCNT nanofluid and nano-enhanced PCM
V. Kumar, D. Singh, S. P. Singh, P. K. Mall, S. Kumar, K. Sadhana
Russian Physics Journal, 2026
On-Design and Off-Design Performance of Variable Area Ejectors: A Comparative Study of Constant Rate of Momentum Change and Constant Rate of Kinetic Energy Change Methods
Virendra Kumar, Paruchuri M. V. Subbarao
Heat Transfer, 2025
The design of the ejector is crucial, as the overall performance and efficiency of the system depend on its internal geometry, dimensions, and flow characteristics. The present experimental study compares the performance of variable area ejectors developed based on the “constant rate of momentum change (CRMC)” and “constant rate of kinetic energy change (CRKEC).” The pressure recovery ratio (PRR) and entrainment ratio (ω) at on‐design operating conditions were computed based on experimental results. The study also optimizes both the ejector's entrainment ratio at off‐design conditions and the impact of nozzle exit positions. CRMC ejectors provide higher entrainment ratios (0.512) and lower PRRs (0.178), while CRKEC ejectors provide slightly higher PRRs (0.18) and lower entrainment ratios (0.5) at on‐design conditions. The results indicate that both variable‐area ejectors based on CRMC and CRKEC have their own advantages and limitations regarding performance and suitability for specific applications.
Sustainable management of solar PV panel waste: A Circular approach to solar PV waste
Sustainable Management of Solar Pv Panel Waste A Circular Approach to Solar Pv Waste, 2025
Numerical Investigation of a Two-Stage Ejector Based on a Constant Rate of Momentum Change: Performance Analysis and Optimisation
Arvind Kumar, Surendra Kumar Yadav, Virendra Kumar
Archives of Thermodynamics, 2025
A two-stage ejector based on a constant rate of momentum change is a geometrical arrangement of a single-stage ejector to further improve its performance, utilising water vapour as a working fluid for both primary and secondary flows. Creating an additional secondary inlet in the single-stage ejector helps to further entrain the secondary mass flow, resulting in a better entrainment ratio. The present study utilises the constant rate of momentum change, and a 1D gas dynamic approach to compute the geometrical profile and flow parameters using MATLAB. The numerical software ANSYS Fluent 18.0 is utilised to analyse the two-stage ejector geometry. The global performance ejector entrainment was computed at on and off design conditions. The results show that the two-stage ejector entrainment ratio is significantly higher than that of the previously studied single-stage ejector. The entrainment ratio of the two-stage ejector increases to reach the on-design value of operating conditions, and then starts decreasing.
Investigating the impact of heat treatment on mechanical behaviour of A36 low-carbon steel
Anant Prakash Agrawal, Shahazad Ali, Virendra Kumar, Pallav Gupta
Archives of Thermodynamics, 2025
Quenching and tempering processes are commonly employed to enhance the physical and mechanical properties of multiphase steels. This study investigated the effects of heat treatment on ASTM A36 low-carbon steel, a material well-suited for structural applications. The novelty of this study lies in the detailed investigation of the quenching and tempering processes applied to ASTM A36 low-carbon steel, focusing on specific tempering temperatures and varying soaking times. The specimens were heated to 900°C and soaked for 2 hours, followed by quenching in an oil bath. Subsequently, they were tempered at low (200°C), medium (300°C), and high (400°C) temperatures for 60, 90, and 120 minutes, respectively. The mechanical properties of the processed specimens, including hardness, tensile strength, and impact strength, were evaluated. The Rockwell hardness showed a significant improvement of 22.75% after treatment. Oil bath quenching followed by tempering increased the ultimate tensile strength by 31.51% and 29.36%, respectively, compared to steel without any heat treatment. However, elongation at break and impact strength decreased by 11.55% and 27.27%, respectively, during quenching. Low, medium, and high temperature tempering at various soak-ing times released the internal stresses, refined the grain structure and exhibited the effect on tensile strength, as well as improved the elongation at break and impact strength by 35.08% and 125%, respectively, compared to quenched steel.
The effect of openings in URM infills on the seismic resilience of a reinforced concrete building
Prasanth S, Goutam Ghosh, Praveen Kumar Gupta, Virendra Kumar, Prabhu Paramasivam
Journal of Asian Architecture and Building Engineering, 2025
In high seismicity regions, the use of unreinforced masonry (URM) infills in reinforced concrete buildings is massive. In most of them, the openings in URM infills due to architectural requirements cause a variation in lateral stiffness which, in turn, alters the dynamic characteristics of the building. Although much research was developed about the effects of openings on the building performance, studies on assessing functionality reduction and resilience of a building in post-disaster scenarios are very few. This paper gives a contribution to that issue by performing and interpreting a parametric analysis which considers five models of a low-rise R.C. building with different percentages of infills openings. The results are expressed as extreme damage probability percentage, damage loss ratio and loss of resilience. The results show that the case with percentage of opening in in the outer and inner infill walls respectively (referred to as IF20–15%) corresponds to a damage loss ratio and a loss of resilience less than the other cases by 3%. IF20–15% model has the extreme damage probability of 5–7% less when compared with other opening cases. Based on this result, for the considered building the optimum infill opening of IF20–15% can be recommended.
Seismic behaviour of the curved bridge with friction pendulum system
Praveen Kumar Gupta, Suyesha Agrawal, Goutam Ghosh, Prasanth S, Virendra Kumar, Prabhu Paramasivam
Journal of Asian Architecture and Building Engineering, 2025
The friction pendulum system (FPS) is a crucial tool for seismic protection. However, effectiveness in curved bridges, especially controlling torsional moments (TMs), has not been thoroughly assessed. This study evaluates how well a continuously curved bridge equipped with FPS performs under various earthquake loadings. The study assesses FPS efficiency, considering factors like multidirectional impacts, seismic motion strength, incidence angle variations, and ground motion characteristics. Finite element modeling of the bridge structure was conducted using SAP2000v20 Finite Element Analysis software. Three earthquake scenarios (near fault, far fault and forward directivity) were considered. The study also examines the bidirectional behavior’s impact on the bearing and pier interaction. A sensitivity analysis was performed for the bridge response concerning bearing design parameters for each earthquake scenario. The results show that FPS bearings significantly reduce the bridge’s seismic response. Bidirectional excitation was found to be critical for curved bridges, increasing displacement compared to unidirectional motion. Under unidirectional excitation, the isolated bridge with FPS reduces TMs by approximately 26–54%. In bidirectional excitation, FPS remains effective, reducing TMs by about 14–43%. This study underscores the importance of FPS in enhancing seismic resilience, particularly in controlling torsional responses in complex, curved bridges in varying seismic conditions.
Model tests on ordinary and geosynthetic encased stone columns with recycled aggregates as filler material
Shivangi Saxena, Lal Bahadur Roy, Praveen Kumar Gupta, Virendra Kumar, Prabhu Paramasivam
International Journal of Geo Engineering, 2024
Purpose Sincethe availability of natural aggregates is very sparse, recycled industrial and construction waste provides a sustainable alternative to ground improvement using vibro replacement method. Utilizing recycled building waste caters the requirement for its disposal and offers an effective remedy for the scarcity of natural resources. The aim of this study was to give a sustainable alternative for the natural aggregates as the material for stone column. Materials and methods A good stone column material should be hard, dense, chemically inert and must comply with the size requirement. The utilization of construction debris and spent railway ballast as column material has been the subject of numerous researches. This work focuses on finding the suitability of railway ballast and concrete debris as alternatives for stone column material. A detailed laboratory testing of these materials has been carried to judge their strength requirements as the material for both Ordinary Stone Columns (OSCs) and Geosynthetic Encased Stone Columns (GESCs). The improvement in capacity of both OSCs and GESCs is evaluated by performing California Bearing Ratio (CBR) test in laboratory by creating unit cell stone column models of different recycled aggregates and comparing their load settlement behavior with natural aggregates. Results and discussion Railway ballast, natural aggregates, concrete debris and virgin soil were found to show decreasing order in CBR test results. Loading required for causing settlement in both OSCs and GESCsshowed remarkable increase as compared to that of virgin clay and the maximum load settlement improvement was observed for railway ballast in both the types of stone columns. The CBR values for GESC made from railway ballast, natural aggregates and concrete debris were 54, 49 and 38% respectively. On the other hand, CBR for OSC made from railway ballast, concrete debris and natural aggregates were found to be 25.5, 20.4 and 24% respectively and CBR of virgin clay was found to be just 11%. Conclusion The demonstrated application of sustainable sources in place of natural aggregates provides a crucial pathway for utilizing the recycled aggregates as stone column filler material. Up on encasing the OSC with geotextile the performance of stone columns has improved appreciably in terms of load capacity. Railway ballast and concrete debris can be adopted as an alternate for the natural stone column materials to improve the bearing capacity of site consisting mainly of soft clays.
Experimental study on the mechanical and hygroscopic properties of alkaline-treated Grewia optiva/basalt fiber-reinforced polymer composites
Pramod Prabhakar Bijlwan, Lalta Prasad, Anshul Sharma, Manoj Kumar Gupta, Virendra Kumar
Biomass Conversion and Biorefinery, 2024
Thermodynamic evaluation of water-cooled photovoltaic thermal system with PCM-based thermal energy storage
Amit Kumar, Lalta Prasad, Virendra Kumar
Sadhana Academy Proceedings in Engineering Sciences, 2024
Enhancing Thermal Performance of Protective Textiles through Smart and Sustainable Fabric with Internal Structure Adjustments: Recent Breakthroughs and Developments
Jnanaranjan Acharya, Virendra Kumar, Dipankar Bhanja, Rahul Dev Misra
Digital Technology Enabled Circular Economy Models for Environmental and Resource Sustainability, 2024
Biodiesel as a potential replacement fuel for CI engine to meet the sustainability criteria: A review
Nishant Kumar Singh, Yashvir Singh, Virendra Kumar, Bhole Singh
Procedia Structural Integrity, 2024
A comprehensive exploration of ejector design, operational factors, performance metrics, and practical applications
Arvind Kumar, Surendra Kumar Yadav, Virendra Kumar, Abhishek Kulkarni
Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2024
Numerical study on effect of operating pressures on CRKEC-based two-stage ejector
Virendra Kumar, Surendra Kumar Yadav, Anil Kumar, Nishant Kumar Singh, Lalta Prasad
Archives of Thermodynamics, 2024
A Critical Review on Materials in Additive Manufacturing Technologies
Abhishek Kulkarni, Surendra Kumar Yadav, Virendra Kumar, Ashu Yadav, Shyam Sunder Sharma
Journal of the Institution of Engineers India Series D, 2024
Finite element analysis of femur bone fracture - modelling and analysis
Pranjal Sarmah, Ravi Kumar, Amrit Thakur, Mohit Sharma, Surendra Kumar Yadav, Virendra Kumar
Archives of Thermodynamics, 2024
A Review on Advancements in Polymer Composites for 3D Printing: Materials, Processes, and Applications
S. Ganesh Kumar, R. Mohamed Rizwan, V. Naveen Kumar, B. Revathi, S. M. Rahul, Indran Suyambulinagm, Felix Sahayaraj Arockiasamy
Springer Proceedings in Materials, 2024
A Review on Solid Oxide Fuel Cell Technology: An Efficient Energy Conversion System
Amit Talukdar, Amrit Chakrovorty, Pranjal Sarmah, Prabhu Paramasivam, Virendra Kumar, Surendra Kumar Yadav, Sathiyamoorthy Manickkam
International Journal of Energy Research, 2024
Influence of α -MnO2and Curing Temperature on Density and Microhardness of Epoxy Nanocomposites
Md Zakir Hussain, Pranjal Sarmah, Surendra Kumar Yadav, Virendra Kumar, Ashu Yadav, Ashish Goyal, Ankit D. Oza, Chander Prakash, Virat Khanna
Journal of Nanotechnology, 2024
Multifunctional advanced ceramics in aerospace and aeronautical engineering: Applications, challenges, and future directions
Advances in Materials Science Research, 2023
Comprehensive Analysis of Solar Panel Performance and Correlations with Meteorological Parameters
Pranjal Sarmah, Dipankar Das, Madhurjya Saikia, Virendra Kumar, Surendra Kumar Yadav, Prabhu Paramasivam, Seshathiri Dhanasekaran
ACS Omega, 2023
Experimental probe into an automative engine run on waste cooking oil biodiesel blend at varying engine speeds
Keshab Biswakarma, Pranjal Sarmah, Prabhu Paramasivam, Seshathiri Dhanasekaran, Surendra Kumar Yadav, Virendra Kumar
Fuel, 2023
Recovered Reverse-Osmosis Water and MgO Nanoparticles for Improved Performance of Solar PV/T Systems
Shweta Singh, Rakesh Kumar Singh, Anil Kumar, Virendra Kumar, Gopal Nath Tiwari
Water Switzerland, 2023
An investigation of combined effect of infill pattern, density, and layer thickness on mechanical properties of 3D printed ABS by fused filament fabrication
Anant Prakash Agrawal, Virendra Kumar, Jitendra Kumar, Prabhu Paramasivam, Seshathiri Dhanasekaran, Lalta Prasad
Heliyon, 2023
Selection of Response Reduction Factor Considering Resilience Aspect
S. Prasanth, Goutam Ghosh, Praveen Kumar Gupta, Virendra Kumar, Prabhu Paramasivam, Seshathiri Dhanasekaran
Buildings, 2023
Numerical assessment on constant rate of kinetic energy change (CKREC) based variable area supersonic nozzle
Virendra Kumar, Surendra Kumar Yadav, Nishant Kumar Singh, Anil Kumar
Materials Today Proceedings, 2023
Design of CRMC non-adiabatic supersonic nozzle with frictional effect
Shambhu Pandit, Anant Prakash Agrawal, Parveen Pachauri, Virendra Kumar, Surendra Kumar Yadav
Materials Today Proceedings, 2023
Seismic hazard analysis of Silchar city located in North East India
Aman Kumar, Goutam Ghosh, Praveen Kumar Gupta, Virendra Kumar, Prabhu Paramasivam
Geomatics Natural Hazards and Risk, 2023
Performance Analysis on the Variable Area Single- and Two-Stage Ejector System at Different Operating Pressures Using Computational Techniques
Virendra Kumar, S. K. Yadav, Ashu Yadav, Anant Prakash Aggarwal, Anil Kumar
Lecture Notes in Mechanical Engineering, 2023
Adsorption of trivalent and pentavalent arsenic ions from the aqueous stream using natural Bombax ceiba fibers: Insights from density functional theory calculations
Shreyas S. Dindorkar, Virendra Kumar, Raj Vardhan Patel
Total Environment Research Themes, 2022
Effectiveness of LRB in Curved Bridge Isolation: A Numerical Study
Praveen Kumar Gupta, Goutam Ghosh, Virendra Kumar, Prabhu Paramasivam, Seshathiri Dhanasekaran
Applied Sciences Switzerland, 2022
Life cycle environmental sustainability and cumulative energy assessment of biomass pellets biofuel derived from agroforest residues
Ahmad Rashedi, Niamat Gul, Majid Hussain, Rana Hadi, Nasreen Khan, Sayyada Ghufrana Nadeem, Taslima Khanam, M. R. M. Asyraf, Virendra Kumar
Plos One, 2022
Mechanical properties of AA6061T6 and AA6351T6 plates joined by friction stir welding
L. Prasad, A. Kumar, R. Jaiswal, A. Kumar, V. Kumar, A. Yadav
Materialwissenschaft Und Werkstofftechnik, 2022
Numerical assessment on the performance of variable area single- and two-stage ejectors: A comparative study
Anil Kumar, Virendra Kumar, PMV Subbarao, Surendra K Yadav, Gaurav Singhal
Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering, 2022
Biodiesel as a potential replacement fuel for CI engine to meet the sustainability criteria: A review
Nishant Kumar Singh, Yashvir Singh, Virendra Kumar, Bhole Singh
Materials Today Proceedings, 2022
Evaluation of Physical, Mechanical, and Wear Properties of Jatropha Shell Powder Reinforced Epoxy Glass Fiber Composites
Lalta Prasad, Rahul Bairwan, Anshul Yadav, Anil Kumar, Virendra Kumar, Jerzy Winczek
Journal of Natural Fibers, 2022
Numerical Analysis on a Constant Rate of Kinetic Energy Change Based a Two-Stage Ejector-Diffuser System
Virendra Kumar, Anil Kumar, Surendra Kumar Yadav, Anshul Yadav, Lalta Prasad, Jerzy Adam Winczek
Strojniski Vestnik Journal of Mechanical Engineering, 2022
Physical and Mechanical Properties of Rambans (Agave) Fiber Reinforced with Polyester Composite Materials
Lalta Prasad, Vinod Singh, Raj Vardhan Patel, Anshul Yadav, Virendra Kumar, Jerzy Winczek
Journal of Natural Fibers, 2022
Physico-Mechanical Properties and Taguchi Optimized Abrasive Wear of Alkali Treated and Fly Ash Reinforced Himalayan Agave Fiber Polyester Composite
Sanjeev Kumar, Lalta Prasad, Vinay Kumar Patel, Virendra Kumar, Anil Kumar, Anshul Yadav
Journal of Natural Fibers, 2022
Numerical study for the influences of nozzle exit position, mixing, and diffuser section lengths on performance of CRMC ejector
S. K. Yadav, K. M. Pandey, R. Gupta, V. Kumar
Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2021
In situ formation of zrb2 and its influence on wear and mechanical properties of adc12 alloy mixed matrix composites
Lalta Prasad, Niteesh Kumar, Anshul Yadav, Anil Kumar, Virendra Kumar, Jerzy Winczek
Materials, 2021
Physical and mechanical properties of natural leaf fiber-reinforced epoxy polyester composites
Sanjeev Kumar, Lalta Prasad, Vinay Kumar Patel, Virendra Kumar, Anil Kumar, Anshul Yadav, Jerzy Winczek
Polymers, 2021
Effect of variation of sic reinforcement on wear behaviour of az91 alloy composites
Anil Kumar, Santosh Kumar, Nilay Krishna Mukhopadhyay, Anshul Yadav, Virendra Kumar, Jerzy Winczek
Materials, 2021
Mechanical Performance of Jute and Basalt Fiber Geo-grid-Reinforced Epoxy Hybrid Composite Material
Lalta Prasad, Aruna Saini, Virendra Kumar
Journal of Natural Fibers, 2021
Comparative study of the VINCI Robot's arm end effector matrix using Python and MATLAB
Tamanna, Moin Uddin, Virendra Kumar, Vinod Kumar Yadav
Materials Today Proceedings, 2021
Comparison of Static and Harmonic Response of Structural Steel and Aluminium Alloy Automotive Shock Absorbers
Abhishek Sharma, Surendra Kumar Yadav, Anshul Yadav, Virendra Kumar, Anil Kumar
Lecture Notes in Mechanical Engineering, 2021
Physical and mechanical behaviour of sugarcane bagasse fibre-reinforced epoxy bio-composites
Lalta Prasad, Shiv Kumar, Raj Vardhan Patel, Anshul Yadav, Virendra Kumar, Jerzy Winczek
Materials, 2020
Optimization of process parameters during WEDM of EN-42 spring steel
Lalta Prasad, Manish Upreti, Anshul Yadav, Raj Vardhan Patel, Virendra Kumar, Anil Kumar
SN Applied Sciences, 2020
Computational analysis of a supersonic two-stage ejector
S.K. Yadav, K.M. Pandey, V. Kumar, R. Gupta
Materials Today Proceedings, 2020
Development of the constant rate of momentum change (CRMC) variable area nozzle
S.K. Yadav, V. Kumar, K.M. Pandey, R. Gupta
Materials Today Proceedings, 2020
Investigation of mechanical and tribological performance of marble dust 7075 aluminium alloy composites
Ashiwani Kumar, Virendra Kumar, Anil Kumar, Binayaka Nahak, Rajesh Singh
Materials Today Proceedings, 2020
Fabrication and evaluation of physical and mechanical properties of jute and coconut coir reinforced polymer matrix composite
Chandra Prakash Singh, Raj Vardhan Patel, Mohd Faizul Hasan, Anshul Yadav, Virendra Kumar, Anil Kumar
Materials Today Proceedings, 2020
Effect of nozzle exit position (NXP) on variable area mixing ejector
V. Kumar, P. M. V. Subbarao, G. Singhal
SN Applied Sciences, 2019
Heat transfer augmentation in automobile radiator using Al2O3–water based nanofluid
Prabhat Chaurasia, Anil Kumar, Anshul Yadav, Praveen Kumar Rai, Virendra Kumar, Lalta Prasad
SN Applied Sciences, 2019
A comparative study on mechanical and dry sliding wear behaviour of Al 7075-T6 welded joints fabricated by FSW, TIG and MIG
Lalta Prasad, Lalit Mohan, Himanshu Prasad Raturi, Virendra Kumar
Lecture Notes in Mechanical Engineering, 2019
Properties of functionally gradient composites reinforced with waste natural fillers
Lalta Prasad, Gaurav Singh, Anshul Yadav, Virendra Kumar, Anil Kumar
Acta Periodica Technologica, 2019
Realization of novel constant rate of kinetic energy change (CRKEC) supersonic ejector
Virendra Kumar, Gaurav Singhal, P.M.V. Subbarao
Energy, 2018
Thermal degradation and gasification characteristics of Tung Shells as an open top downdraft wood gasifier feedstock
Lalta Prasad, B. L. Salvi, Virendra Kumar
Clean Technologies and Environmental Policy, 2015
Study of supersonic flow in a constant rate of momentum change (CRMC) ejector with frictional effects
Virendra Kumar, Gaurav Singhal, P.M.V. Subbarao
Applied Thermal Engineering, 2013

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