Dr. Pratyush Kumar is a SNSF Swiss Postdoctoral Fellow at the Seminar for Applied Mathematics, ETH Zürich. He completed his Ph.D. in Mechanical Engineering from IIT Bombay. His research bridges computational fluid dynamics (CFD), multiphase flows, and Artificial Intelligence, focusing on foundation models and physics-informed neural networks. He is also the founder of iteraSim, an AI-assisted RAG framework for CFD, and is an active digital educator reaching over 1,000 researchers globally.
Scaling Law Analysis for Transient Fluid Flow and Heat Transfer Characteristics of Packed Bed with Mono-Sized Pebbles AS Pratyush Kumar, Sandip K Saha Proceedings of Fluid Mechanics and Fluid Power (FMFP) 2023 (FMFP 2023) 6 … , 2026 2026.0
Numerical study of bouncing Leidenfrost viscoplastic drops P Kumar, S Sarkar, SK Saha Physics of Fluids 38 (3) , 2026 2026.0
Explaining Advaitavedānta through Computational Models of Non-Duality Pragya, DM Joshi, P Kumar International Journal of Recent Development in Engineering and Technology 14 … , 2025 2025.0
Pressure Drop and Interfacial Heat Transfer Coefficient Formulation for Packed Bed Systems with Cylindrical Capsules A Kumar, P Kumar, SK Saha Transport in Porous Media 152 (1), 3 , 2025 2025.0 Citations: 1
Development of Scaling Laws for Fluid Flow and Heat Transfer Analysis of Packed Beds Filled with Monosized Pebbles P Kumar, SK Saha, A Sharma Industrial & Engineering Chemistry Research 63 (31), 13864-13880 , 2024 2024.0 Citations: 2
Experimental and CFD-DEM study on local packing distribution and thermofluidic analysis of binary packed bed P Kumar, SK Saha, A Sharma Chemical Engineering Science 282, 119372 , 2023 2023.0 Citations: 18
Comparative study of surface roughness models in the hydro-thermal characterization of flow over rough walls SKS Sangram Kumar Samal (सामल), Pratyush Kumar (कुमार) Physics of Fluid 35 (095106) , 2023 2023.0 Citations: 6
Effect of size ratio on permeability and local packing fraction of the binary packed bed P Kumar, SK Saha, A Sharma Conference on Fluid Mechanics and Fluid Power, 539-551 , 2022 2022.0 Citations: 1
Entropy generation minimization-based heat transfer and mass transfer study of rectangular packed-bed filled with spherical particles P Kumar, SK Saha, A Sharma Fusion Engineering and Design 184, 113295 , 2022 2022.0 Citations: 13
CFD Investigation of helium gas flow in sphere packed (Pebble bed) in a rectangular canister using OpenFOAM P Kumar, SK Saha, A Sharma, D Sharma, P Chaudhuri Fusion Engineering and Design 172, 112858 , 2021 2021.0 Citations: 14
Computational Analysis of Coolant Flow in Packed Bed for VHTR Design: Investigation of Thermal-Hydraulic Characteristics using OpenFOAM AS Pratyush Kumar, Sandip Saha Proceedings of the 27th National and 5th International ISHMT-ASTFE Heat and … , 0
MOST CITED SCHOLAR PUBLICATIONS
Experimental and CFD-DEM study on local packing distribution and thermofluidic analysis of binary packed bed P Kumar, SK Saha, A Sharma Chemical Engineering Science 282, 119372 , 2023 2023.0 Citations: 18
CFD Investigation of helium gas flow in sphere packed (Pebble bed) in a rectangular canister using OpenFOAM P Kumar, SK Saha, A Sharma, D Sharma, P Chaudhuri Fusion Engineering and Design 172, 112858 , 2021 2021.0 Citations: 14
Entropy generation minimization-based heat transfer and mass transfer study of rectangular packed-bed filled with spherical particles P Kumar, SK Saha, A Sharma Fusion Engineering and Design 184, 113295 , 2022 2022.0 Citations: 13
Comparative study of surface roughness models in the hydro-thermal characterization of flow over rough walls SKS Sangram Kumar Samal (सामल), Pratyush Kumar (कुमार) Physics of Fluid 35 (095106) , 2023 2023.0 Citations: 6
Development of Scaling Laws for Fluid Flow and Heat Transfer Analysis of Packed Beds Filled with Monosized Pebbles P Kumar, SK Saha, A Sharma Industrial & Engineering Chemistry Research 63 (31), 13864-13880 , 2024 2024.0 Citations: 2
Pressure Drop and Interfacial Heat Transfer Coefficient Formulation for Packed Bed Systems with Cylindrical Capsules A Kumar, P Kumar, SK Saha Transport in Porous Media 152 (1), 3 , 2025 2025.0 Citations: 1
Effect of size ratio on permeability and local packing fraction of the binary packed bed P Kumar, SK Saha, A Sharma Conference on Fluid Mechanics and Fluid Power, 539-551 , 2022 2022.0 Citations: 1
Scaling Law Analysis for Transient Fluid Flow and Heat Transfer Characteristics of Packed Bed with Mono-Sized Pebbles AS Pratyush Kumar, Sandip K Saha Proceedings of Fluid Mechanics and Fluid Power (FMFP) 2023 (FMFP 2023) 6 … , 2026 2026.0
Numerical study of bouncing Leidenfrost viscoplastic drops P Kumar, S Sarkar, SK Saha Physics of Fluids 38 (3) , 2026 2026.0
Explaining Advaitavedānta through Computational Models of Non-Duality Pragya, DM Joshi, P Kumar International Journal of Recent Development in Engineering and Technology 14 … , 2025 2025.0
Computational Analysis of Coolant Flow in Packed Bed for VHTR Design: Investigation of Thermal-Hydraulic Characteristics using OpenFOAM AS Pratyush Kumar, Sandip Saha Proceedings of the 27th National and 5th International ISHMT-ASTFE Heat and … , 0
Publications
8 Peer-Reviewed Journal Publications (including Physics of Fluids, Chemical Engineering Science, and Industrial & Engineering Chemistry Research) and 5 International Conference Proceedings.
GRANT DETAILS
SNSF Swiss Postdoctoral Fellowship (Grant #234158) with CHF 170,000 / INR 1.65 Crores funding (2025–2027); Co-PI on IKS-IITB Project with INR 5 Lakhs funding (2021–2022).
RESEARCH OUTPUTS (PATENTS, SOFTWARE, PUBLICATIONS, PRODUCTS)
Developed iteraSim RAG (, an agentic Retrieval-Augmented Generation framework for OpenFOAM. Developed custom solvers for Leidenfrost droplet dynamics and LTNE porous media modeling.
Industry, Institute, or Organisation Collaboration
Ongoing research collaborations with ETH Zürich (Switzerland), IIT Bombay (India), and the IKS Division (Ministry of Education, India).
INDUSTRY EXPERIENCE
Founder of iteraSim (2023–Present), developing AI-assisted CFD solutions for simulation-driven engineering.
STARTUP
Founder of iteraSim (. The startup provides an intelligent centralized interface that simplifies OpenFOAM simulation workflows via specialized LLMs and vector databases.
SOCIAL, ECONOMIC, or ACADEMIC BENEFITS
Democratizing high-performance computing via the iteraSim platform. Actively serving the global research community through an educational YouTube channel with >50 instructional CFD/OpenFOAM videos.
