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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Mechanical and Aerospace Engineering 39 2202 2049 56 55 173 4059

Ranjan Das publications per year

The chart shows the history of publications by Ranjan Das between 1980 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Ranjan Das published across 46 years, from 1980 to 2025, averaging 5.5 papers a year. Output peaked at 24 publications in 2021. 38 of the 252 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1980 to 2025. Vertical axis: number of publications, 0 to 24. Peak 24 publications in 2021. 1980: 1 publication 1981: 0 publications 1982: 0 publications 1983: 0 publications 1984: 0 publications 1985: 0 publications 1986: 0 publications 1987: 0 publications 1988: 0 publications 1989: 0 publications 1990: 0 publications 1991: 0 publications 1992: 0 publications 1993: 0 publications 1994: 1 publication 1995: 0 publications 1996: 0 publications 1997: 0 publications 1998: 0 publications 1999: 0 publications 2000: 0 publications 2001: 0 publications 2002: 0 publications 2003: 0 publications 2004: 0 publications 2005: 0 publications 2006: 0 publications 2007: 1 publication 2008: 3 publications 2009: 3 publications 2010: 5 publications 2011: 5 publications 2012: 6 publications 2013: 9 publications 2014: 15 publications 2015: 11 publications 2016: 21 publications 2017: 16 publications 2018: 14 publications 2019: 19 publications 2020: 14 publications 2021: 24 publications 2022: 22 publications 2023: 24 publications 2024: 23 publications 2025: 15 publications
1980 2025

252 publications in total across all disciplines

View publications per year as a table
Ranjan Das: publications per year, 1980 to 2025
Year Publications
1980 1
1981 0
1982 0
1983 0
1984 0
1985 0
1986 0
1987 0
1988 0
1989 0
1990 0
1991 0
1992 0
1993 0
1994 1
1995 0
1996 0
1997 0
1998 0
1999 0
2000 0
2001 0
2002 0
2003 0
2004 0
2005 0
2006 0
2007 1
2008 3
2009 3
2010 5
2011 5
2012 6
2013 9
2014 15
2015 11
2016 21
2017 16
2018 14
2019 19
2020 14
2021 24
2022 22
2023 24
2024 23
2025 15
Total 252
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Ranjan Das publications per year - data summary

  • Ranjan Das, a Mechanical and Aerospace Engineering scholar from Indian Institute of Technology Ropar, has 252 publications recorded across 46 years, from 1980 to 2025.
  • The oldest publication on record dates to 1980 and the most recent to 2025.
  • The most productive years are 2021 and 2023, with 24 publications each.
  • The least productive years with any output are 1980, 1994 and 2007, with 1 publication each.
  • 25 of the 46 years in the span carry no publications at all (1981, 1982, 1983, 1984 and others).
  • The rate of publication averages 5.5 papers per year over the whole span, or 12.0 per year counting only the 21 years with at least one publication.
  • The last 5 years on the chart (2021-2025) hold 108 publications, 43% of the career total.
  • Split into equal eras - 1980-1995: 2 publications (0.1 per year); 1996-2011: 17 publications (1.1 per year); 2012-2025: 233 publications (16.6 per year).
  • Comparing the opening and closing eras, the overall trend of publication is rising.

Ranjan Das publication distribution in Mechanical and Aerospace Engineering in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Mechanical and Aerospace Engineering in 2026. The highlighted bar marks where Ranjan Das sits on this spectrum.

No. of scientists
50 100 150
Bar chart with 63 bars. Horizontal axis: publications, 47–56 to 659+. Vertical axis: number of scientists, 0 to 155. Most scientists, 155, have 147–156 publications. The last bar groups every scientist with 659 publications or more. The highlighted bar, 167–176 publications, is where this scientist sits. 47–56 publications: 10 scientists 57–66 publications: 23 scientists 67–76 publications: 32 scientists 77–86 publications: 62 scientists 87–96 publications: 67 scientists 97–106 publications: 91 scientists 107–116 publications: 113 scientists 117–126 publications: 115 scientists 127–136 publications: 130 scientists 137–146 publications: 140 scientists 147–156 publications: 155 scientists 157–166 publications: 132 scientists 167–176 publications: 133 scientists 177–186 publications: 130 scientists 187–196 publications: 140 scientists 197–206 publications: 115 scientists 207–216 publications: 125 scientists 217–226 publications: 117 scientists 227–236 publications: 99 scientists 237–246 publications: 92 scientists 247–256 publications: 100 scientists 257–266 publications: 95 scientists 267–276 publications: 88 scientists 277–286 publications: 77 scientists 287–296 publications: 74 scientists 297–306 publications: 74 scientists 307–316 publications: 62 scientists 317–326 publications: 70 scientists 327–336 publications: 59 scientists 337–346 publications: 58 scientists 347–356 publications: 45 scientists 357–366 publications: 44 scientists 367–376 publications: 36 scientists 377–386 publications: 41 scientists 387–396 publications: 32 scientists 397–406 publications: 23 scientists 407–416 publications: 28 scientists 417–426 publications: 27 scientists 427–436 publications: 25 scientists 437–446 publications: 23 scientists 447–456 publications: 23 scientists 457–466 publications: 20 scientists 467–476 publications: 12 scientists 477–486 publications: 24 scientists 487–496 publications: 18 scientists 497–506 publications: 12 scientists 507–516 publications: 13 scientists 517–526 publications: 21 scientists 527–536 publications: 12 scientists 537–546 publications: 8 scientists 547–556 publications: 16 scientists 557–566 publications: 3 scientists 567–576 publications: 11 scientists 577–586 publications: 6 scientists 587–596 publications: 5 scientists 597–606 publications: 6 scientists 607–616 publications: 7 scientists 617–626 publications: 7 scientists 627–636 publications: 10 scientists 637–646 publications: 4 scientists 647–656 publications: 3 scientists 657–658 publications: 2 scientists 659+ publications: 100 scientists
47–56 publications 659+

This scientist: 173 publications — 34th percentile

34% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 659 publications or more.

View publications distribution as a table
Number of Mechanical and Aerospace Engineering scientists by publication count, Research.com 2026 ranking edition. Based on 3,445 ranked scientists.
Publications Scientists This scientist
47–56 10
57–66 23
67–76 32
77–86 62
87–96 67
97–106 91
107–116 113
117–126 115
127–136 130
137–146 140
147–156 155
157–166 132
167–176 133 173
177–186 130
187–196 140
197–206 115
207–216 125
217–226 117
227–236 99
237–246 92
247–256 100
257–266 95
267–276 88
277–286 77
287–296 74
297–306 74
307–316 62
317–326 70
327–336 59
337–346 58
347–356 45
357–366 44
367–376 36
377–386 41
387–396 32
397–406 23
407–416 28
417–426 27
427–436 25
437–446 23
447–456 23
457–466 20
467–476 12
477–486 24
487–496 18
497–506 12
507–516 13
517–526 21
527–536 12
537–546 8
547–556 16
557–566 3
567–576 11
577–586 6
587–596 5
597–606 6
607–616 7
617–626 7
627–636 10
637–646 4
647–656 3
657–658 2
659+ 100
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Ranjan Das publication distribution in Mechanical and Aerospace Engineering in 2026 - data summary

  • The chart plots the publication count of all 3,445 Mechanical and Aerospace Engineering scientists ranked by Research.com in 2026, grouped into 63 ranges running from 47–56 to 659+ publications.
  • Ranjan Das, a Mechanical and Aerospace Engineering scholar from Indian Institute of Technology Ropar, records 173 publications - the 34th percentile of the discipline.
  • 34% of ranked Mechanical and Aerospace Engineering scientists score the same or lower than Ranjan Das, and about 66% score higher.
  • The median of the discipline falls in the 217–226 publications range, and Ranjan Das ranks below the median.
  • The most crowded range is 147–156 publications, holding 155 scientists (4% of the field).
  • 46% of the field sits in the lowest quarter of the value range (up to 197–206 publications), so the distribution leans towards the lower end of the scale.
  • The final bar has no upper bound: it groups every scientist with 659 publications or more, 100 scientists in all (3% of the field).

Ranjan Das D-index placement in Mechanical and Aerospace Engineering in 2026

The chart shows the D-index (discipline H-index) distribution of Mechanical and Aerospace Engineering scientists ranked by Research.com in 2026. The highlighted bar marks where Ranjan Das sits on this spectrum.

No. of scientists
50 100 150
Bar chart with 64 bars. Horizontal axis: D-Index, 30 to 93+. Vertical axis: number of scientists, 0 to 189. Most scientists, 189, have 34 D-Index. The last bar groups every scientist with 93 D-Index or more. The highlighted bar, 39 D-Index, is where this scientist sits. 30 D-Index: 83 scientists 31 D-Index: 113 scientists 32 D-Index: 144 scientists 33 D-Index: 153 scientists 34 D-Index: 189 scientists 35 D-Index: 158 scientists 36 D-Index: 139 scientists 37 D-Index: 127 scientists 38 D-Index: 130 scientists 39 D-Index: 126 scientists 40 D-Index: 104 scientists 41 D-Index: 100 scientists 42 D-Index: 107 scientists 43 D-Index: 101 scientists 44 D-Index: 103 scientists 45 D-Index: 79 scientists 46 D-Index: 88 scientists 47 D-Index: 70 scientists 48 D-Index: 83 scientists 49 D-Index: 44 scientists 50 D-Index: 64 scientists 51 D-Index: 56 scientists 52 D-Index: 50 scientists 53 D-Index: 48 scientists 54 D-Index: 58 scientists 55 D-Index: 52 scientists 56 D-Index: 48 scientists 57 D-Index: 42 scientists 58 D-Index: 34 scientists 59 D-Index: 42 scientists 60 D-Index: 37 scientists 61 D-Index: 42 scientists 62 D-Index: 44 scientists 63 D-Index: 22 scientists 64 D-Index: 33 scientists 65 D-Index: 29 scientists 66 D-Index: 23 scientists 67 D-Index: 29 scientists 68 D-Index: 24 scientists 69 D-Index: 19 scientists 70 D-Index: 34 scientists 71 D-Index: 26 scientists 72 D-Index: 19 scientists 73 D-Index: 18 scientists 74 D-Index: 19 scientists 75 D-Index: 14 scientists 76 D-Index: 19 scientists 77 D-Index: 8 scientists 78 D-Index: 18 scientists 79 D-Index: 16 scientists 80 D-Index: 12 scientists 81 D-Index: 17 scientists 82 D-Index: 11 scientists 83 D-Index: 16 scientists 84 D-Index: 7 scientists 85 D-Index: 9 scientists 86 D-Index: 8 scientists 87 D-Index: 6 scientists 88 D-Index: 6 scientists 89 D-Index: 7 scientists 90 D-Index: 10 scientists 91 D-Index: 4 scientists 92 D-Index: 4 scientists 93+ D-Index: 100 scientists
30 D-Index 93+

This scientist: 39 D-Index — 40th percentile

40% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 93 D-Index or more.

View D-Index distribution as a table
Number of Mechanical and Aerospace Engineering scientists by D-index, Research.com 2026 ranking edition. Based on 3,445 ranked scientists.
D-Index Scientists This scientist
30 83
31 113
32 144
33 153
34 189
35 158
36 139
37 127
38 130
39 126 39
40 104
41 100
42 107
43 101
44 103
45 79
46 88
47 70
48 83
49 44
50 64
51 56
52 50
53 48
54 58
55 52
56 48
57 42
58 34
59 42
60 37
61 42
62 44
63 22
64 33
65 29
66 23
67 29
68 24
69 19
70 34
71 26
72 19
73 18
74 19
75 14
76 19
77 8
78 18
79 16
80 12
81 17
82 11
83 16
84 7
85 9
86 8
87 6
88 6
89 7
90 10
91 4
92 4
93+ 100
Download as CSV

Ranjan Das D-index placement in Mechanical and Aerospace Engineering in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 3,445 Mechanical and Aerospace Engineering scientists ranked by Research.com in 2026, grouped into 64 ranges running from 30 to 93+ D-Index.
  • Ranjan Das, a Mechanical and Aerospace Engineering scholar from Indian Institute of Technology Ropar, records 39 D-Index - the 40th percentile of the discipline.
  • 40% of ranked Mechanical and Aerospace Engineering scientists score the same or lower than Ranjan Das, and about 60% score higher.
  • The median of the discipline falls in the 43 D-Index range, and Ranjan Das ranks below the median.
  • The most crowded range is 34 D-Index, holding 189 scientists (5% of the field).
  • 57% of the field sits in the lowest quarter of the value range (up to 45 D-Index), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 93 D-Index or more, 100 scientists in all (3% of the field).

Overview

Ranjan Das is affiliated with the Indian Institute of Technology Ropar in India with a primary focus in Engineering, having produced 140 publications in this field. Their research encompasses various subfields, notably Mechanical Engineering, Renewable Energy, Sustainability and the Environment, Biomedical Engineering, Computational Mechanics, and Building and Construction.

The scientist's research covers multiple interrelated topics including Heat Transfer and Optimization, Solar Thermal and Photovoltaic Systems, Solar-Powered Water Purification Methods, Heat Transfer Mechanisms, Adsorption and Cooling Systems, Refrigeration and Air Conditioning Technologies, and Thermodynamic and Exergetic Analyses of Power and Cooling Systems.

Among recent publications, notable papers include:

  • Simultaneous estimation of heat generation and magnetic field in a radial porous fin from surface temperature information, 2021, International Communications in Heat and Mass Transfer
  • Thermodynamic activity of a ternary nanofluid flow passing through a permeable slipped surface with heat source and sink, 2022, Waves in Random and Complex Media
  • Experimental Analysis of a Novel Solar Pond Driven Thermoelectric Energy System, 2020, Journal of Energy Resources Technology
  • Comparative assessment of different air-conditioning systems for nearly/net zero-energy buildings, 2020, International Journal of Energy Research
  • Experimental study of a combined biomass and solar energy-based fully grid-independent air-conditioning system, 2021, Clean Technologies and Environmental Policy

Ranjan Das frequently collaborates with several researchers, including Sunirmit Verma, Gaurav Singh, Sagnik Pal, Adityabir Singh, and Rohtash Goswami, with coauthorships ranging from 6 to 16 joint publications each.

Their work has been published recurrently in several venues with multiple contributions, particularly in:

  • Solar Energy
  • Journal of Energy Resources Technology
  • Proceedings of the International Conference on Advances in Energy Research and Applications, ICAERA
  • International Journal of Energy Research
  • Journal of Energy Storage

Best Publications

  • An experimental and multi-objective optimization study of a forced draft cooling tower with different fills

    Kuljeet Singh;Ranjan Das

  • Predicting multiple combination of parameters for designing a porous fin subjected to a given temperature requirement

    Ranjan Das;K.T. Ooi

  • Forward and inverse solutions of a conductive, convective and radiative cylindrical porous fin

    Ranjan Das

  • A simplex search method for a conductive–convective fin with variable conductivity

    Ranjan Das

  • Tower characteristics correlation and parameter retrieval in wet-cooling tower with expanded wire mesh packing

    Rohit K. Singla;Kuljeet Singh;Ranjan Das

  • An Inverse Analysis for Parameter Estimation Applied to a Non-Fourier Conduction–Radiation Problem

    Ranjan Das;Subhash C. Mishra;T. B. Pavan Kumar;Ramgopal Uppaluri

  • Inverse prediction and optimization analysis of a solar pond powering a thermoelectric generator

    Abhishek Kumar;Kuljeet Singh;Sunirmit Verma;Ranjan Das

  • Multiparameter Estimation in a Transient Conduction-Radiation Problem Using the Lattice Boltzmann Method and the Finite-Volume Method Coupled with the Genetic Algorithms

    Ranjan Das;Subhash C. Mishra;R. Uppaluri

  • Waste heat recovery from a biomass heat engine for thermoelectric power generation using two-phase thermosyphons

    Rohtash Goswami;Ranjan Das

  • Prediction of porosity and thermal diffusivity in a porous fin using differential evolution algorithm

    Ranjan Das;Dilip K. Prasad

  • Thermodynamic activity of a ternary nanofluid flow passing through a permeable slipped surface with heat source and sink

    Unknown

  • Energy Saving Potential of a Combined Solar and Natural Gas-Assisted Vapor Absorption Building Cooling System

    Gaurav Singh;Ranjan Das

  • Retrieval of thermal properties in a transient conduction–radiation problem with variable thermal conductivity

    Ranjan Das;Subhash C. Mishra;R. Uppaluri

  • Inverse analysis applied to retrieval of parameters and reconstruction of temperature field in a transient conduction–radiation heat transfer problem involving mixed boundary conditions

    Ranjan Das;Subhash C. Mishra;R. Uppaluri

  • Simultaneous optimization of performance parameters and energy consumption in induced draft cooling towers

    Kuljeet Singh;Ranjan Das

  • Application of decomposition method and inverse prediction of parameters in a moving fin

    Rohit K. Singla;Ranjan Das

  • An inverse method for optimization of geometric parameters of a Savonius-style wind turbine

    Sukanta Roy;Ranjan Das;Ujjwal K. Saha

  • Heat transfer improvement of a wet fin under transient response with a unique design arrangement aspect

    Balaram Kundu;Ranjan Das;Pramod A. Wankhade;Kwan-Soo Lee

  • Exergy optimization of cooling tower for HGSHP and HVAC applications

    Kuljeet Singh;Ranjan Das

  • Application of genetic algorithm for unknown parameter estimations in cylindrical fin

    Ranjan Das

  • A feedback model to predict parameters for controlling the performance of a mechanical draft cooling tower

    Kuljeet Singh;Ranjan Das

  • Lattice Boltzmann Method Applied to the Analysis of Transient Conduction-Radiation Problems in a Cylindrical Medium

    Subhash C. Mishra;Man Young Kim;Ranjan Das;M. Ajith

  • Application of Adomian decomposition method and inverse solution for a fin with variable thermal conductivity and heat generation

    Rohit K. Singla;Ranjan Das

  • Approximate Analytical Method for Porous Stepped Fins with Temperature-Dependent Heat Transfer Parameters

    Kuljeet Singh;Ranjan Das;Balaram Kundu

  • Estimation of operating parameters of a SOFC integrated combined power cycle using differential evolution based inverse method

    P. Sarmah;T.K. Gogoi;R. Das

  • Predicting geometry of rectangular and hyperbolic fin profiles with temperature-dependent thermal properties using decomposition and evolutionary methods

    Arka Bhowmik;Rohit K. Singla;Pranab K. Roy;Dilip K. Prasad

  • Establishment of non-Fourier heat conduction model for an accurate transient thermal response in wet fins

    Pramod A. Wankhade;Balaram Kundu;Balaram Kundu;Ranjan Das

  • Application of artificial bee colony algorithm for maximizing heat transfer in a perforated fin

    Ranjan Das;Kuljeet Singh;Bahriye Akay;TK Gogoi

Frequent Co-Authors

Balaram Kundu
Balaram Kundu Jadavpur University
Subhash C. Mishra
Subhash C. Mishra Indian Institute of Technology Guwahati
Ujjwal K. Saha
Ujjwal K. Saha Indian Institute of Technology Guwahati
Kim Tiow Ooi
Kim Tiow Ooi Nanyang Technological University
Kwan-Soo Lee
Kwan-Soo Lee Hanyang University
Dhruba K. Bhattacharyya
Dhruba K. Bhattacharyya Tezpur University

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