World

Top 100 Scientists

World Top 100 Scientists 2026

The Top 100 scientists are ranked based on total H-index scores at the global, regional, national, and institutional levels. Rankings cover 10 regions, 13 main fields, and 221 subfields. Subject field rankings (at world, region, country, and university levels) are currently in Beta version and updated in near real-time.
Note: Researchers classified as "others" (currently 1,122,060 profiles whose fields are undetermined or unedited) are excluded from subject and regional rankings. These rankings will dynamically evolve as the “others” profiles are reviewed and properly categorized.

Country

* Total H Index Rankings

Rankings

28,467

World Rank

210

Country Rank

University

Ranking Based On Selection:

Vimal Chandra Srivastava

Indian Institute of Technology IIT Roorkee Roorkee, India

Engineering & Technology / Chemical Engineering
Separation Processes & Catalysis | Pollution Abatement | Desulfurization | CO2 Utilization & Alternative Fuels | Nanomaterial

H-Index Metrics

H-Index

74
i10 Index

222
Citation Counts

22,488

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* Total H Index Rankings

Rankings

62,164

World Rank

731

Country Rank

University

Ranking Based On Selection:

Patit Paban Kundu

Indian Institute of Technology IIT Roorkee Roorkee, India

Engineering & Technology / Chemical Engineering
Membrane Sc & Technology | Microbial Fuel Cell | DMFC | URFC | drug deliver

H-Index Metrics

H-Index

57
i10 Index

210
Citation Counts

11,370

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* Total H Index Rankings

Rankings

72,595

World Rank

894

Country Rank

University

Ranking Based On Selection:

B Prasad

Indian Institute of Technology IIT Roorkee Roorkee, India

Engineering & Technology / Chemical Engineering
Biomass energy | air and water pollutio

H-Index Metrics

H-Index

54
i10 Index

236
Citation Counts

12,461

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* Total H Index Rankings

Rankings

169,688

World Rank

3,245

Country Rank

University

Ranking Based On Selection:

Surendra Pal Singh

Indian Institute of Technology IIT Roorkee Roorkee, India

Engineering & Technology / Chemical Engineering
Paper Technology | Chemical Engineerin

H-Index Metrics

H-Index

39
i10 Index

210
Citation Counts

8,408

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* Total H Index Rankings

Rankings

248,048

World Rank

5,721

Country Rank

University

Ranking Based On Selection:

Vimal Kumar

Indian Institute of Technology IIT Roorkee Roorkee, India

Engineering & Technology / Chemical Engineering
Computational Modelling of Multiphasic Systems | Rheology of Complex Fluids | Interfacial Phenomen

H-Index Metrics

H-Index

31
i10 Index

51
Citation Counts

3,599

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* Total H Index Rankings

Rankings

358,337

World Rank

9,743

Country Rank

131

University

Ranking Based On Selection:

Naveen Kumar Navani

Indian Institute of Technology IIT Roorkee Roorkee, India

Engineering & Technology / Chemical Engineering
biosensors | probiotics | nanobiotechnolog

H-Index Metrics

H-Index

25
i10 Index

36
Citation Counts

2,690

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* Total H Index Rankings

Rankings

360,231

World Rank

9,841

Country Rank

134

University

Ranking Based On Selection:

Ram Prakash Bharti|R.P. Bharti, Ram Prakash, Ram P. Bharti

Indian Institute of Technology IIT Roorkee Roorkee, India

Engineering & Technology / Chemical Engineering
Fluid Dynamics | Microfluidics | Rheology | Electrokinetic Flows | Heat Transfe

H-Index Metrics

H-Index

25
i10 Index

39
Citation Counts

2,464

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* Total H Index Rankings

Rankings

390,846

World Rank

11,050

Country Rank

146

University

Ranking Based On Selection:

Shashi Kumar

Indian Institute of Technology IIT Roorkee Roorkee, India

Engineering & Technology / Chemical Engineering
Modelling and Simulation of Chemical Processes | Transfer Processes | Computer Aided Process and Plant Design | Membrane Processe