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Engineering and Technology
India
2026

D-Index & Metrics

Engineering and Technology

D-Index
89
Citations
24415
World Ranking
304
National Ranking
5

G.N. Tiwari publication distribution in Engineering and Technology in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Engineering and Technology in 2026. The highlighted bar marks where G.N. Tiwari sits on this spectrum.

38–47 publications: 20 scientists 48–57 publications: 35 scientists 58–67 publications: 96 scientists 68–77 publications: 135 scientists 78–87 publications: 190 scientists 88–97 publications: 259 scientists 98–107 publications: 283 scientists 108–117 publications: 369 scientists 118–127 publications: 341 scientists 128–137 publications: 386 scientists 138–147 publications: 372 scientists 148–157 publications: 457 scientists 158–167 publications: 415 scientists 168–177 publications: 407 scientists 178–187 publications: 421 scientists 188–197 publications: 378 scientists 198–207 publications: 403 scientists 208–217 publications: 317 scientists 218–227 publications: 346 scientists 228–237 publications: 321 scientists 238–247 publications: 260 scientists 248–257 publications: 280 scientists 258–267 publications: 240 scientists 268–277 publications: 214 scientists 278–287 publications: 242 scientists 288–297 publications: 203 scientists 298–307 publications: 166 scientists 308–317 publications: 154 scientists 318–327 publications: 175 scientists 328–337 publications: 159 scientists 338–347 publications: 99 scientists 348–357 publications: 131 scientists 358–367 publications: 106 scientists 368–377 publications: 118 scientists 378–387 publications: 97 scientists 388–397 publications: 108 scientists 398–407 publications: 82 scientists 408–417 publications: 71 scientists 418–427 publications: 64 scientists 428–437 publications: 55 scientists 438–447 publications: 54 scientists 448–457 publications: 60 scientists 458–467 publications: 47 scientists 468–477 publications: 40 scientists 478–487 publications: 30 scientists 488–497 publications: 29 scientists 498–507 publications: 38 scientists 508–517 publications: 40 scientists 518–527 publications: 32 scientists 528–537 publications: 23 scientists 538–547 publications: 28 scientists 548–557 publications: 23 scientists 558–567 publications: 19 scientists 568–577 publications: 16 scientists 578–587 publications: 17 scientists 588–597 publications: 18 scientists 598–607 publications: 22 scientists 608–617 publications: 15 scientists 618–627 publications: 9 scientists 628–637 publications: 11 scientists 638–647 publications: 21 scientists 648–657 publications: 12 scientists 658–667 publications: 9 scientists 668–677 publications: 11 scientists 678–687 publications: 9 scientists 688–697 publications: 6 scientists 698–707 publications: 14 scientists 708–717 publications: 7 scientists 718–727 publications: 8 scientists 728–737 publications: 10 scientists 738–747 publications: 9 scientists 748–757 publications: 5 scientists 758–767 publications: 5 scientists 768–777 publications: 11 scientists 778–787 publications: 7 scientists 788–797 publications: 2 scientists 798–803 publications: 4 scientists 804+ publications: 100 scientists
38 publications 804+

This scientist: 520 publications — 95th percentile

95% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 804 publications or more.

G.N. Tiwari D-index placement in Engineering and Technology in 2026

The chart shows the D-index (discipline H-index) distribution of Engineering and Technology scientists ranked by Research.com in 2026. The highlighted bar marks where G.N. Tiwari sits on this spectrum.

30 D-Index: 59 scientists 31 D-Index: 114 scientists 32 D-Index: 129 scientists 33 D-Index: 189 scientists 34 D-Index: 200 scientists 35 D-Index: 262 scientists 36 D-Index: 311 scientists 37 D-Index: 312 scientists 38 D-Index: 350 scientists 39 D-Index: 385 scientists 40 D-Index: 348 scientists 41 D-Index: 362 scientists 42 D-Index: 426 scientists 43 D-Index: 380 scientists 44 D-Index: 310 scientists 45 D-Index: 341 scientists 46 D-Index: 301 scientists 47 D-Index: 306 scientists 48 D-Index: 271 scientists 49 D-Index: 246 scientists 50 D-Index: 210 scientists 51 D-Index: 253 scientists 52 D-Index: 213 scientists 53 D-Index: 221 scientists 54 D-Index: 195 scientists 55 D-Index: 186 scientists 56 D-Index: 170 scientists 57 D-Index: 167 scientists 58 D-Index: 166 scientists 59 D-Index: 144 scientists 60 D-Index: 152 scientists 61 D-Index: 141 scientists 62 D-Index: 138 scientists 63 D-Index: 131 scientists 64 D-Index: 118 scientists 65 D-Index: 114 scientists 66 D-Index: 119 scientists 67 D-Index: 95 scientists 68 D-Index: 87 scientists 69 D-Index: 77 scientists 70 D-Index: 89 scientists 71 D-Index: 69 scientists 72 D-Index: 54 scientists 73 D-Index: 46 scientists 74 D-Index: 55 scientists 75 D-Index: 54 scientists 76 D-Index: 49 scientists 77 D-Index: 53 scientists 78 D-Index: 46 scientists 79 D-Index: 28 scientists 80 D-Index: 39 scientists 81 D-Index: 36 scientists 82 D-Index: 24 scientists 83 D-Index: 26 scientists 84 D-Index: 36 scientists 85 D-Index: 18 scientists 86 D-Index: 25 scientists 87 D-Index: 19 scientists 88 D-Index: 26 scientists 89 D-Index: 27 scientists 90 D-Index: 23 scientists 91 D-Index: 15 scientists 92 D-Index: 12 scientists 93 D-Index: 9 scientists 94 D-Index: 15 scientists 95 D-Index: 10 scientists 96 D-Index: 13 scientists 97 D-Index: 13 scientists 98 D-Index: 9 scientists 99 D-Index: 7 scientists 100 D-Index: 7 scientists 101 D-Index: 8 scientists 102 D-Index: 7 scientists 103 D-Index: 7 scientists 104 D-Index: 9 scientists 105 D-Index: 6 scientists 106 D-Index: 9 scientists 107+ D-Index: 99 scientists
30 D-Index 107+

This scientist: 89 D-Index — 97th percentile

97% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 107 D-Index or more.

Research.com Recognitions

  • 2026 - Research.com Engineering and Technology in India Leader Award
  • 2025 - Research.com Engineering and Technology in India Leader Award
  • 2023 - Research.com Engineering and Technology in India Leader Award
  • 2022 - Research.com Engineering and Technology in India Leader Award

Overview

G.N. Tiwari is affiliated with the Indian Institute of Technology Delhi in India, focusing extensively on research related to energy and engineering. Their work spans over the domains of renewable energy systems, particularly solar thermal and photovoltaic technologies.

The scientist's research chiefly covers topics such as:

  • Solar Thermal and Photovoltaic Systems
  • Photovoltaic System Optimization Techniques
  • Solar-Powered Water Purification Methods
  • Solar Radiation and Photovoltaics
  • Solar Cell Performance Optimization
  • Thermal Radiation and Cooling Technologies
  • Greenhouse Technology and Climate Control

Tiwari's contributions are positioned largely in the fields of Energy and Engineering, with a particular emphasis on subfields including:

  • Renewable Energy, Sustainability and the Environment
  • Artificial Intelligence
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Plant Science

Scientific articles authored or coauthored by Tiwari demonstrate engagement with several topics in solar energy and its applications, illustrated by a few recent publications:

  • Effect of shape of condensing cover on energy and exergy analysis of a PVT-CPC active solar distillation system, 2020, Solar Energy
  • Effect of top cover cooling on the performance of hemispherical solar still, 2020, Materials Today Proceedings
  • Environmental and economic sustainability of PVT drying system: A heat transfer approach, 2020, Environmental Progress & Sustainable Energy
  • Determination of optimum tilt and azimuth angle of BiSPVT system along with its performance due to shadow of adjacent buildings, 2021, Solar Energy
  • Experimental study of solar energy-based water purifier of single-slope type by incorporating a number of similar evacuated tubular collectors, 2021, Environmental Science and Pollution Research

Tiwari has frequently collaborated with other researchers including Rohit Tripathi, Akhoury Sudhir Kumar Sinha, Rohit Kumar Singh, Md. Meraj, and P. K. Srivastava.

Their work appears regularly in scholarly venues such as Materials Today Proceedings, Solar Energy, International Journal of Ambient Energy, Journal of Solar Energy Engineering, and Renewable Energy.

In addition to journal contributions, Tiwari has published a book titled Advance Solar Photovoltaic Thermal Energy Technologies released in 2023 by Springer Science+Business Media, adding to their academic output.

Best Publications

  • Present status of solar distillation

    G.N. Tiwari;H.N. Singh;Rajesh Tripathi

  • Thermal modeling of a combined system of photovoltaic thermal (PV/T) solar water heater

    Swapnil Dubey;G.N. Tiwari

  • Photovoltaic modules and their applications: A review on thermal modelling

    G.N. Tiwari;R.K. Mishra;S.C. Solanki

  • Life cycle cost analysis of single slope hybrid (PV/T) active solar still

    Shiv Kumar;G.N. Tiwari

  • Effect of water depths on heat and mass transfer in a passive solar still: in summer climatic condition

    Anil Kr. Tiwari;G.N. Tiwari

  • Estimation of convective mass transfer in solar distillation systems

    Sanjay Kumar;G.N. Tiwari

  • Monthly performance of passive and active solar stills for different Indian climatic conditions

    H.N. Singh;G.N. Tiwari

  • Effect of water depth on internal heat and mass transfer for active solar distillation

    Rajesh Tripathi;G.N. Tiwari

  • Analysis of PV/T flat plate water collectors connected in series

    Swapnil Dubey;G.N. Tiwari

  • Single basin solar still coupled with flat plate collector

    S.N. Rai;G.N. Tiwari

  • Embodied energy analysis of adobe house

    Ashish Shukla;G.N. Tiwari;M.S. Sodha

  • Solar Distillation Practice For Water Desalination Systems

    G. N. Tiwari

  • Parametric study of an active and passive solar distillation system: Energy and exergy analysis

    G.N. Tiwari;Vimal Dimri;Arvind Chel

  • Grape drying by using hybrid photovoltaic-thermal (PV/T) greenhouse dryer: An experimental study

    P. Barnwal;G.N. Tiwari

  • Performance of a solar still integrated with evacuated tube collector in natural mode

    Ragh Vendra Singh;Shiv Kumar;M.M. Hasan;M. Emran Khan

  • Simple multiple wick solar still: Analysis and performance

    M.S. Sodha;Ashvini Kumar;G.N. Tiwari;R.C. Tyagi

  • Energy and exergy analysis of photovoltaic/thermal integrated with a solar greenhouse

    Sujata Nayak;G.N. Tiwari

  • Solar radiation models—A review

    M. Jamil Ahmad;M. Jamil Ahmad;G. N. Tiwari

  • Thermal modeling based on solar fraction and experimental study of the annual and seasonal performance of a single slope passive solar still: The effect of water depths

    Anil Kr. Tiwari;G.N. Tiwari

  • Life cycle cost assessment of building integrated photovoltaic thermal (BIPVT) systems

    Basant Agrawal;G.N. Tiwari

  • Optimization of Tilt Angle for Solar Collector to Receive Maximum Radiation

    G. N. Tiwari;M. Jamil Ahmad

Frequent Co-Authors

M. S. Sodha
M. S. Sodha Indian Institute of Technology Delhi
Ashish Shukla
Ashish Shukla GLA University
Atul Kumar Srivastava
Atul Kumar Srivastava Indian Institute of Tropical Meteorology
S.C. Kaushik
S.C. Kaushik Indian Institute of Technology Delhi
Brian Norton
Brian Norton Tyndall National Institute
Ashok Kumar
Ashok Kumar Indian Institute of Technology Kanpur
Omid Mahian
Omid Mahian Ningbo University
Alibakhsh Kasaeian
Alibakhsh Kasaeian University of Tehran
Ibrahim Dincer
Ibrahim Dincer University of Ontario Institute of Technology

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