World's Best Scientists 2026 revealed!

D-Index & Metrics

Engineering and Technology

D-Index
50
Citations
8878
World Ranking
4107
National Ranking
1184

Nigel N. Clark 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 Nigel N. Clark 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: 348 publications — 83rd percentile

83% of scientists in this discipline score the same or lower.

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

Nigel N. Clark 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 Nigel N. Clark 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: 50 D-Index — 59th percentile

59% of scientists in this discipline score the same or lower.

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

Overview

Nigel N. Clark is affiliated with West Virginia University in the United States. Their research is primarily situated within the field of Engineering, with a focus on several subfields including Mechanical Engineering, Fluid Flow and Transfer Processes, Automotive Engineering, Renewable Energy, Sustainability and the Environment, as well as Global and Planetary Change.

The scientist's work concentrates on topics such as Advanced Combustion Engine Technologies, Vehicle Emissions and Performance, Energy, Environment, and Transportation Policies, Atmospheric and Environmental Gas Dynamics, Advanced Thermodynamic Systems and Engines, Virtual Reality Applications and Impacts, and Atmospheric Chemistry and Aerosols.

Clark has contributed to multiple peer-reviewed journals and publication venues with frequent appearances in Atmospheric Environment X, Journal of the Air & Waste Management Association, The Science of The Total Environment, SSRN Electronic Journal, and International Journal of Ambient Energy.

Selected recent papers authored or co-authored by Nigel N. Clark include:

  • Methane emissions from oil and gas production sites and their storage tanks in West Virginia (2022), Atmospheric Environment X
  • Numerical investigation of combustion characteristics of a single-cylinder linear engine fueled by natural gas under the influence of exhaust gas recirculation (2022), International Journal of Ambient Energy
  • Evaluation of emissions benefits of OBD-based repairs for potential application in a heavy-duty vehicle Inspection and Maintenance program (2021), Atmospheric Environment
  • Quantification of gasoline-ethanol blend emissions effects (2020), Journal of the Air & Waste Management Association
  • Comprehensive US database and model for ethanol blend effects on regulated tailpipe emissions (2021), The Science of The Total Environment

Frequent collaborators in their research include Derek Johnson, Tracey L. Footer, Scott C. Herndon, Eben D. Thoma, and David L. McKain.

The scientist's publication record reflects a significant engagement with environmental and engineering challenges related to combustion engines, emissions, and sustainable energy systems. Their work integrates experimental and numerical investigations, often examining the environmental impact of fuel blends and emission control technologies.

Best Publications

  • Emissions from nine heavy trucks fueled by diesel and biodiesel blend without engine modification

    W G Wang;D W Lyons;N N Clark;M Gautam

  • Development of molecular marker source profiles for emissions from on-road gasoline and diesel vehicle fleets.

    Glynis C. Lough;Charles G. Christensen;James J. Schauer;James Tortorelli

  • Numerical Simulation of a Two-Stroke Linear Engine-Alternator Combination

    Christopher M. Atkinson;Sorin Petreanu;Nigel N. Clark;Richard J. Atkinson

  • Chord length distributions related to bubble size distributions in multiphase flows

    N.N. Clark;R. Turton

  • An experimental investigation of the combustion process of a heavy-duty diesel engine enriched with H2

    C. Liew;H. Li;John P. Nuszkowski;S. Liu

  • Factors Affecting Heavy-Duty Diesel Vehicle Emissions

    Nigel N Clark;Justin M Kern;Christopher M Atkinson;Ralph D Nine

  • Variations in Speciated Emissions from Spark-Ignition and Compression-Ignition Motor Vehicles in California’s South Coast Air Basin

    Eric M. Fujita;Barbara Zielinska;David E. Campbell;W. Patrick Arnott

  • An explicit relationship to predict spherical particle terminal velocity

    R. Turton;N.N. Clark

  • Predicting the holdup in two‐phase bubble upflow and downflow using the Zuber and Findlay drift‐flux model

    N. N. Clark;R. L. Flemmer

  • Emissions comparisons from alternative fuel buses and diesel buses with a chassis dynamometer testing facility

    Wen G. Wang;N. N. Clark;D. W. Lyons;R. M. Yang

  • Development of a linear alternator-engine for hybrid electric vehicle applications

    W.R. Cawthorne;P. Famouri;Jingdong Chen;N.N. Clark

  • Near-Field Characterization of Methane Emission Variability from a Compressor Station Using a Model Aircraft

    Brian J. Nathan;Levi M. Golston;Anthony S. O'Brien;Kevin Ross

  • Relationships between distributions of chord lengths and distributions of bubble sizes including their statistical parameters

    W. Liu;N.N. Clark

  • NEURAL NETWORK MODELLING OF THE EMISSIONS AND PERFORMANCE OF A HEAVY-DUTY DIESEL ENGINE

    G J Thompson;C M Atkinson;N N Clark;T W Long

  • Three techniques for implementing digital fractal analysis of particle shape

    N.N. Clark

  • Relationship between bubble size distributions and chord-length distribution in heterogeneously bubbling systems

    Weidong Liu;Nigel N. Clark;Ali Ihsan Karamavruç

  • Design and testing of a novel linear alternator and engine system for remote electrical power generation

    P. Famouri;W.R. Cawthorne;N. Clark;S. Nandkumar

  • Emissions from Trucks using Fischer-Tropsch Diesel Fuel

    Paul Norton;Keith Vertin;Brent Bailey;Nigel N. Clark

  • An experimental investigation of H2 emissions of a 2004 heavy-duty diesel engine supplemented with H2

    T. Gatts;H. Li;C. Liew;S. Liu

  • A holistic approach to particle drag prediction

    Teresa L. Thompson;N.N. Clark

  • A Comparison of Emissions and Fuel Economy from Hybrid-Electric and Conventional-Drive Transit Buses

    W. Scott Wayne;Nigel N. Clark;Ralph D. Nine;Dennis Elefante

  • Numerical simulation of a two-stroke liner engine-alternator combination

    Christopher M. Atkinson;Sorin Petreanu;Nigel N. Clark;Richard J. Atkinson

Frequent Co-Authors

Barbara Zielinska
Barbara Zielinska Desert Research Institute
Stephen Matthews
Stephen Matthews Imperial College London
Peter H. McMurry
Peter H. McMurry University of Minnesota
James J. Schauer
James J. Schauer University of Wisconsin–Madison
Susan M. Kingsman
Susan M. Kingsman Oxford BioMedica (United Kingdom)
Judith C. Chow
Judith C. Chow Desert Research Institute
Aki Virkkula
Aki Virkkula Finnish Meteorological Institute
Risto Hillamo
Risto Hillamo Finnish Meteorological Institute
Robert B. Russell
Robert B. Russell Heidelberg University
Cheryl L. Waldner
Cheryl L. Waldner University of Saskatchewan

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