Raj Kumar

3.1k total citations · 1 hit paper
93 papers, 2.4k citations indexed

About

Raj Kumar is a scholar working on Mechanical Engineering, Renewable Energy, Sustainability and the Environment and Computational Mechanics. According to data from OpenAlex, Raj Kumar has authored 93 papers receiving a total of 2.4k indexed citations (citations by other indexed papers that have themselves been cited), including 51 papers in Mechanical Engineering, 36 papers in Renewable Energy, Sustainability and the Environment and 26 papers in Computational Mechanics. Recurrent topics in Raj Kumar's work include Heat Transfer Mechanisms (40 papers), Solar Thermal and Photovoltaic Systems (32 papers) and Fluid Dynamics and Turbulent Flows (24 papers). Raj Kumar is often cited by papers focused on Heat Transfer Mechanisms (40 papers), Solar Thermal and Photovoltaic Systems (32 papers) and Fluid Dynamics and Turbulent Flows (24 papers). Raj Kumar collaborates with scholars based in India, South Korea and Hungary. Raj Kumar's co-authors include Ranchan Chauhan, Sushil Kumar, Muneesh Sethi, Akshay Bhardwaj, Anil Kumar, Tej Singh, Rahul Nadda, Daeho Lee, Rajesh Maithani and Sushil Kumar and has published in prestigious journals such as Renewable and Sustainable Energy Reviews, The Science of The Total Environment and Scientific Reports.

In The Last Decade

Raj Kumar

91 papers receiving 2.3k citations

Hit Papers

Different energy storage techniques: recent advancements,... 2024 2026 2025 2024 25 50 75
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Different energy storage techniques: recent advancements, applications, limitations, and efficient utilization of sustainable energy
    2024 78 citations Raj Kumar, Daeho Lee et al. Journal of Thermal Analysis and Calorimetry profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Raj Kumar India 31 1.6k 884 637 454 234 93 2.4k
Ataollah Khanları Türkiye 33 2.0k 1.3× 1.2k 1.4× 352 0.6× 875 1.9× 311 1.3× 73 2.7k
Ranchan Chauhan India 33 1.9k 1.2× 743 0.8× 776 1.2× 431 0.9× 244 1.0× 65 2.8k
Ceylin Şirin Türkiye 22 1.2k 0.7× 1.0k 1.1× 206 0.3× 359 0.8× 282 1.2× 30 1.8k
Faraz Afsharı Türkiye 27 1.3k 0.8× 730 0.8× 185 0.3× 482 1.1× 166 0.7× 73 1.8k
M. Mohanraj India 36 2.7k 1.7× 1.8k 2.0× 274 0.4× 582 1.3× 266 1.1× 130 4.3k
T.V. Arjunan India 28 1.4k 0.9× 1.4k 1.6× 252 0.4× 349 0.8× 394 1.7× 74 2.6k
H.P. Garg India 33 1.4k 0.9× 2.2k 2.5× 300 0.5× 368 0.8× 140 0.6× 156 3.3k
Sumit Tiwari India 22 535 0.3× 859 1.0× 209 0.3× 131 0.3× 382 1.6× 73 1.7k
Harish Kumar Ghritlahre India 20 782 0.5× 499 0.6× 307 0.5× 160 0.4× 87 0.4× 48 1.4k
Sushil Kumar India 24 1.1k 0.7× 444 0.5× 214 0.3× 250 0.6× 60 0.3× 74 1.6k

Countries citing papers authored by Raj Kumar

Since Specialization
Citations

This map shows the geographic impact of Raj Kumar's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Raj Kumar with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Raj Kumar more than expected).

Fields of papers citing papers by Raj Kumar

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Raj Kumar. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Raj Kumar. The network helps show where Raj Kumar may publish in the future.

Co-authorship network of co-authors of Raj Kumar

This figure shows the co-authorship network connecting the top 25 collaborators of Raj Kumar. A scholar is included among the top collaborators of Raj Kumar based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Raj Kumar. Raj Kumar is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Kumar, Khushmeet, et al.. (2025). Solar Thermal Collector Roughened with S-Shaped Ribs: Parametric Optimization Using AHP-MABAC Technique. Fluids. 10(3). 67–67. 4 indexed citations
2.
Kumar, Raj, P.E. Lokhande, Vishal Kadam, et al.. (2025). Emergence of perovskites oxides as advanced Photocatalysts for energy and environmental remediation applications. Coordination Chemistry Reviews. 534. 216556–216556. 7 indexed citations
3.
Kumar, Raj, et al.. (2024). Improved performance evaluation of a dual passage solar thermal collector using staggered turbulators. Thermal Science and Engineering Progress. 53. 102668–102668. 9 indexed citations
4.
Kumar, M. Vinod, Ashwin Raut, Ahmad Alyaseen, et al.. (2024). Polypropylene waste plastic fiber morphology as an influencing factor on the performance and durability of concrete: Experimental investigation, soft-computing modeling, and economic analysis. Construction and Building Materials. 438. 137244–137244. 20 indexed citations
5.
Kumar, Raj, Daeho Lee, Ümit Ağbulut, et al.. (2024). Different energy storage techniques: recent advancements, applications, limitations, and efficient utilization of sustainable energy. Journal of Thermal Analysis and Calorimetry. 149(5). 1895–1933. 78 indexed citations breakdown →
6.
Thapa, Sashank, Raj Kumar, & Daeho Lee. (2024). Energetic and exergetic analysis of jet impingement solar thermal collector featuring discrete multi-arc shaped ribs absorber surface. Energy. 306. 132392–132392. 9 indexed citations
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Nadda, Rahul, Chandrakant K. Nirala, Prashant Kumar Singh, et al.. (2024). An overview of techniques for monitoring and compensating tool wear in micro-electrical discharge machining. Heliyon. 10(6). e26784–e26784. 7 indexed citations
9.
Kumar, Raj, et al.. (2024). Performance analysis and modelling of circular jets aeration in an open channel using soft computing techniques. Scientific Reports. 14(1). 3140–3140. 8 indexed citations
10.
Khargotra, Rohit, Raj Kumar, Ashutosh Sharma, & Tej Singh. (2023). Design and performance optimization of solar water heating system with perforated obstacle using hybrid multi-criteria decision-making approach. Journal of Energy Storage. 63. 107099–107099. 26 indexed citations
11.
Khargotra, Rohit, et al.. (2023). Techno-economic analysis of solar thermal collector for sustainable built environment. Journal of Thermal Analysis and Calorimetry. 149(3). 1175–1184. 11 indexed citations
12.
Kumar, Raj, Sushil Kumar, Ümit Ağbulut, et al.. (2023). Parametric optimization of an impingement jet solar air heater for active green heating in buildings using hybrid CRITIC-COPRAS approach. International Journal of Thermal Sciences. 197. 108760–108760. 23 indexed citations
13.
Kumar, Raj, Rahul Nadda, Sushil Kumar, et al.. (2023). Convective heat transfer enhancement using impingement jets in channels and tubes: A comprehensive review. Alexandria Engineering Journal. 70. 349–376. 27 indexed citations
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Kumar, Raj, et al.. (2021). Influence of active water stream, irradiance, ambient temperature and wind speed on the efficiency of Fresnel lens based two stage PVT system. Thermal Science. 26(2 Part A). 1139–1150. 17 indexed citations
18.
Khargotra, Rohit, Raj Kumar, & Sushil Kumar. (2021). Impact of perforated shapes in delta type hindrance promoter on thermo-hydraulic performance of solar water heating system (An experimental study). Case Studies in Thermal Engineering. 24. 100831–100831. 25 indexed citations
19.
Bhardwaj, Akshay, et al.. (2017). Experimental investigation of an indirect solar dryer integrated with phase change material for drying valeriana jatamansi (medicinal herb). Case Studies in Thermal Engineering. 10. 302–314. 101 indexed citations
20.
Kumar, Raj, Anil Kumar, Ranchan Chauhan, & Rajesh Maithani. (2017). Comparative study of effect of various blockage arrangements on thermal hydraulic performance in a roughened air passage. Renewable and Sustainable Energy Reviews. 81. 447–463. 31 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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