IITK Logo Aeroscience Computations & Analysis Lab
JOURNALS

  1. Aggarwal, A., & Rajesh Ranjan. Role of curvature in controlling SWBLI behavior in a hypersonic double ramp flow. Frontiers in Mechanical Engineering, 11 (2025)

  2. Pasupuleti, P. K., Srichaitanya, K., & Rajesh Ranjan. Comparative evaluation of propeller modeling approaches for efficient simulations of wing–propeller interaction. Journal of Aerospace Sciences and Technologies (To Appear, 2025)

  3. Pasupuleti, P. K., Srichaitanya, K., & Rajesh Ranjan. Influence of blade, hub, and nacelle modeling on propeller–wing interactions in turboprop simulations. European Physical Journal - Special Topics (2025)

  4. Rajesh Ranjan, Venkatesh, T. N., & Mathew, J. Editorial: Special issue on “new directions in computational fluid dynamics”. Computers & Fluids, 106701 (2025)

  5. Rajesh Ranjan, Robinet, J., & Gaitonde, D. Characterization and low-order representation of the vortex meandering motion in upswept afterbody wakes. European Journal of Mechanics-B/Fluids, 106 (2024)

  6. Sharma, K., & Rajesh Ranjan. Numerical prediction of largely separated flows in low-pressure turbine blades with high loading. Sadhana, 49, 61 (2024)

  7. Prabtani, K. M., & Rajesh Ranjan. Turbulence modeling for SWTBLI with expansion wave interference inside scramjet inlets. International Journal of Computational Fluid Dynamics, 37(3), 201–217 (2023)

  8. Doshi, P. S., Rajesh Ranjan, & Gaitonde, D. V. Global and local modal characteristics of supersonic open cavity flows. Physics of Fluids, 34(3), 034104 (2022). Editor’s Pick

  9. Liu, Q., Gaitonde, D. V., & Rajesh Ranjan. Global stability analysis of flow behind an upswept aftbody. AIAA Journal, 60(2), 1257–1261 (2022)

  10. Rajesh Ranjan, Robinet, J.-C., & Gaitonde, D. Instability mechanisms in meandering streamwise vortex pairs of upswept afterbody wakes. European Journal of Mechanics-B/Fluids, 96, 90–104 (2022)

  11. Joshi, R., Shriwastav, A., Manek, V., Tiwari, P., Dixit, A., Kumar Mishra, S., … Rajesh Ranjan. Advancement of research on yagya-national symposium consensus. Interdisciplinary Journal of Yagya Research, 4(2), 28–39 (2021)

  12. Rajesh Ranjan, Sharma, A., & Verma, M. K. Characterization of the second wave of COVID-19 in India. Current Science, 121(1), 85–93 (2021)

  13. Rajesh Ranjan, Unnikrishnan, S., Robinet, J.-C., & Gaitonde, D. Global transition dynamics of flow in a lid-driven cubical cavity. Theoretical and Computational Fluid Dynamics, 35(3), 397–418 (2021)

  14. Rajesh Ranjan. COVID-19 spread in India: Dynamics, modeling, and future projections. Journal of Indian Statistical Association, 58(2), 47–65 (2020)

  15. Rajesh Ranjan. Temporal dynamics of COVID-19 outbreak and future projections: A data-driven approach. Transactions of the Indian National Academy of Engineering, 5(2), 109–115 (2020)

  16. Rajesh Ranjan, Aultman, M., & Gaitonde, D. Mean flowfield evolution with upsweep angle in a simulated cargo fuselage aftbody. Journal of Aircraft, 57(6), 1156–1169 (2020)

  17. Rajesh Ranjan, & Gaitonde, D. Hysteresis in slanted-base-cylinder afterbody flows. Aerospace Science and Technology, 106, 106138 (2020)

  18. Rajesh Ranjan, Unnikrishnan, S., & Gaitonde, D. A robust approach for stability analysis of complex flows using high-order Navier-Stokes solvers. Journal of Computational Physics, 403, 109076 (2020)

  19. Riley, L. P., Rajesh Ranjan, & Gaitonde, D. V. Spectral content in a supersonic backward-facing step flow. Journal of Spacecraft and Rockets, 58(1), 210–221 (2020)

  20. Patel, K. S., Maruthi, N., Rajesh Ranjan, Deshpande, S., & Narasimha, R. A critical comparison of DNS versus model results on an HPT blade for a small engine. Journal of Aerospace Sciences and Technologies, 71, 219–224 (2019)

  21. Rajesh Ranjan, Deshpande, S., & Narasimha, R. New insights from high-resolution compressible DNS studies on an LPT blade boundary layer. Computers & Fluids, 153, 49–60 (2017)

  22. Rajesh Ranjan, & Narasimha, R. An assessment of the two-layer quasi-laminar theory of relaminarization through recent high-Re accelerated turbulent boundary layer experiments. Journal of Fluids Engineering, 139(11) (2017)

  23. Khare, A., Baig, R., Rajesh Ranjan, Shah, S., Pavithran, S., Nikam, K., & Moitra, A. Computational simulation of flow over a high lift trapezoidal wing. International Journal of Aerospace Innovations, 1(4) (2009)

CONFERENCE PROCEEDINGS (SCOPUS-indexed)

  1. Kumar, P., & Rajesh Ranjan. Evaluation of physics-informed machine learning approach for computation of fluid flows. Lecture Notes in Mechanical Engineering: Proceedings of the 10th International and 50th National Conference on Fluid Mechanics and Fluid Power (FMFP), pp. 429–440 (2025)

  2. Prabtani, K., & Rajesh Ranjan. Relaminarization effects on SWTBLI due to upstream expansion. Proceedings of the 15th International Symposium on Experimental and Computational Aerothermodynamics of Internal Flows, pp. 1–13 (2025)

  3. Patel, B., & Rajesh Ranjan. Flow features of propeller wakes impinging on a circular disk through unsteady simulations. Fluid Mechanics and Fluid Power (Vol. 1), FMFP 2024. Lecture Notes in Mechanical Engineering, pp. 769–781 (2024)

  4. Phirke, Y., & Rajesh Ranjan. Strategies for efficient GPU acceleration of a high-order 3D LES solver using OpenACC. 2024 IEEE 31st International Conference on High Performance Computing, Data and Analytics Workshop (HiPCW), pp. 169–170 (2024)

  5. Nitya, M., & Rajesh Ranjan. Numerical investigation of transitional flows over NACA 0012. Fluid Mechanics and Fluid Power (Vol. 3), FMFP 2021. Lecture Notes in Mechanical Engineering, pp. 381–385 (2023)

  6. Saha, G., & Rajesh Ranjan. Transition modelling for flow separation in low-pressure turbine cascades. Fluid Mechanics and Fluid Power (Vol. 1), FMFP 2021. Lecture Notes in Mechanical Engineering, p. 319. Best Paper in the Session Award (2023)

  7. Anand, P., & Rajesh Ranjan. Aerothermal predictions of high-pressure turbine flows using RANS methods. Aerospace and Associated Technology (Proceedings of ICTACEM 2021), Chap. 92, pp. 1–6. Best Paper Award (2022)

  8. Rajparaand, S., & Rajesh Ranjan. RANS modelling for short and long separation bubbles in flow past low-pressure turbine cascades. Aerospace and Associated Technology (Proceedings of ICTACEM 2021), Chap. 98, pp. 1–6 (2022)

  9. Doshi, P. S., Rajesh Ranjan, Liu, Q., Gist, E. D., Gaitonde, D. V., & Glauser, M. N. Toward a passive control strategy for a supersonic multi-stream flow using resolvent analysis. AIAA Scitech 2021 Forum, p. 1557 (2021)

  10. Rajesh Ranjan, Garmann, D. J., & Gaitonde, D. V. Compressibility effects on flow behind a simulated transport aircraft fuselage. AIAA Aviation 2021 Forum, p. 2560 (2021)

  11. Aultman, M., Rajesh Ranjan, & Gaitonde, D. V. Effect of upsweep angle on the mean flow of a simulated cargo fuselage. AIAA Scitech 2020 Forum (2020)

  12. Rajesh Ranjan, Robinet, J.-C., & Gaitonde, D. V. Meandering of longitudinal wake vortices in slanted base afterbody flows. AIAA Scitech 2020 Forum (2020)

  13. Doshi, P., Rajesh Ranjan, & Gaitonde, D. V. 2D and 3D stability of cavity flows in high Mach number regimes. ASME-IMECE 2019 (2019)

  14. Riley, L. P., Rajesh Ranjan, & Gaitonde, D. V. Unsteadiness in a supersonic backward-facing step flow. AIAA Aviation 2019 Forum, p. 3343 (2019)

  15. Riley, L. P., Rajesh Ranjan, & Gaitonde, D. V. Unsteady scales of a supersonic backward-facing step flow via perturbation analysis. AIAA Scitech 2019 Forum, p. 1910 (2019)

  16. Rajesh Ranjan, Unnikrishnan, S., & Gaitonde, D. V. On the use of mean flow perturbation for global stability analysis. AIAA Aviation 2018 Forum (2018)

  17. Rajesh Ranjan, Deshpande, S., & Narasimha, R. A high-resolution compressible DNS study of flow past a low-pressure gas turbine blade. Advances in Computation, Modeling and Control of Transitional and Turbulent Flows, pp. 291–301 (2016)

  18. Rajesh Ranjan, Deshpande, S., & Narasimha, R. Direct numerical simulation of compressible flow past a low pressure turbine blade at high incidence. Proceedings of ASME 2014 4th Joint US-European FEDSM (2014)

  19. Moitra, A., Rajesh Ranjan, Khare, A., Shah, S., & Nikam, K. Viscous flow analysis of a twin-engine commercial transport aircraft in high lift landing configuration. 29th AIAA Applied Aerodynamics Conference, p. 3011 (2011)

CONFERENCE PROCEEDINGS

  1. Aggarwal, A., & Rajesh Ranjan. Shock–boundary layer interactions in double ramp flow in the presence of curvature. 35th International Symposium on Shock Waves (ISSW35), DST Travel Award (2025)

  2. Avdieiev, A., Jayakumar, R., Mouvanal, S., & Rajesh Ranjan. Effect of wall temperature on hypersonic double ramp flow dynamics. APS Division of Fluid Dynamics Meeting Abstracts (2025, Submitted)

  3. Chanda, S., Kumawat, S., Tiwari, A., Rajesh Ranjan, & Tripathi, A. Continuum simulation of granular flows in a rotating cylinder. Powders and Grains Conference (2025, Submitted)

  4. Kumar, P., Tongaria, M., & Rajesh Ranjan. Predicting turbomachinery flows with physics-informed neural networks and sparse data assimilation. 26th AeSI CFD Symposium (2025)

  5. Menon, T., & Rajesh Ranjan. Wake-blade interaction on a high-speed transonic LPT cascade. International Conference on Sustainable Aerospace Technologies and Innovations (ICSATI-2025, Proceedings in publication)

  6. Bajpai, Y., & Rajesh Ranjan. Large-eddy simulations and reduced-order modeling for NACA4412 flow near the stall angle. 12th International Conference on Computational Fluid Dynamics (ICCFD12, 2024)

  7. Chauhan, J., & Rajesh Ranjan. Passive flow control in realistic scramjets. 10th Symposium on Applied Aerodynamics and Design of Aerospace Vehicles (SAROD-2024)

  8. Gupta, R., Jain, A., & Rajesh Ranjan. Numerical prediction and separation control of flows in a low-pressure turbine cascade at transonic conditions. Asian Conference on Gas Turbines (ACGT-2024), IIT Kanpur

  9. Kumar, P., & Rajesh Ranjan. Flow predictions behind NACA 2412 aerofoil using physics-informed machine learning. 12th International Conference on Computational Fluid Dynamics (ICCFD12, 2024)

  10. Nidharia, M., Phirke, Y., & Rajesh Ranjan. A GPU-enabled curvilinear LES solver for high-speed flows. SAROD-2024

  11. Nidharia, M., & Rajesh Ranjan. Effect of Mach number on the stability of backward facing step flows. 8th National Symposium on Shock Waves (NSSW 2024), IIT Kanpur

  12. Patel, V., Jain, A., & Rajesh Ranjan. Accelerating supersonic flow simulations: CUDA optimization of the ‘PRAVAH’ LES solver. 8th National Symposium on Shock Waves (NSSW 2024), IIT Kanpur

  13. Raj, P., Sethi, V., & Rajesh Ranjan. Predictions of heat-transfer on high-pressure turbine blades at varying turbulent intensities. Asian Conference on Gas Turbines (ACGT-2024), IIT Kanpur

  14. Srichaitanya, K., Pasupuleti, P. K., & Rajesh Ranjan. Simulations of propeller-wing interactions in a typical turboprop aircraft using virtual blade modeling. Annual AeSI CFD Symposium (2024), BIT Mesra

  15. Aggarwal, A., & Rajesh Ranjan. Spatio-temporal evolution of SWBLI in hypersonic double ramp flow using high-order LES. 9th Symposium on Applied Aerodynamics and Design of Aerospace Vehicles (SAROD-2022)

  16. Chauhan, J., & Rajesh Ranjan. Computational study of supersonic flow past compression and expansion corners. 14th Asian Computational Fluid Dynamics Conference (ACFD-2023)

  17. Patel, K. S., Maruthi, N. H., Rajesh Ranjan, Deshpande, S. M., & Narasimha, R. Direct numerical simulation of flow over a high-pressure turbine blade of a small experimental turbofan engine. 14th Asian CFD Conference (2023)

  18. Phirke, Y., Giri, H., Modani, M., & Rajesh Ranjan. Multi-GPU acceleration and optimization of a high-order curvilinear CFD code. 14th Asian CFD Conference (2023)

  19. Rajesh Ranjan. Necessity and Feasibility of DNS Studies for Complex Turbomachinery Flows. 13th Asian Computational Fluid Dynamics (ACFD) Conference, Jeju Korea (2022)

  20. Kavan Prabtani, Rajesh Ranjan. Numerical Investigation of Shock Wave-Boundary Layer Interactions inside Scramjet Inlet. 13th Asian Computational Fluid Dynamics (ACFD) Conference, Jeju Korea (2022)

  21. Kshitij Sharma, Rajesh Ranjan. Numerical Prediction of Largely Separated Flows in Low-pressure Turbine Blades with High Loading. 9th International & 49th National Conference on Fluid Mechanics and Fluid Power (FMFP 2022)

  22. Prabtani, K. M., & Rajesh Ranjan. Numerical investigation of shock wave-boundary layer interactions inside scramjet inlet. Korea Computational Fluid Engineering Society Conference Proceedings (ACFD-2022), pp. 189–190 (2023)

  23. Sharma, K., & Rajesh Ranjan. Numerical investigation of separation control in low-pressure turbines using dimpled surfaces. 14th Asian CFD Conference (2023)

  24. Doshi, P., Rajesh Ranjan, & Gaitonde, D. Stability characteristics of open cavities at high Mach numbers. APS Division of Fluid Dynamics Meeting Abstracts (2020)

  25. Rajesh Ranjan, & Gaitonde, D. Unsteady dynamics of upswept-base-cylinder afterbody flows. APS Division of Fluid Dynamics Meeting Abstracts (2020)

  26. Patel, K. S., Maruthi, N., Rajesh Ranjan, Deshpande, S., & Narasimha, R. A critical comparison of DNS versus model results on an HPT blade for a small engine. 20th AeSI CFD Symposium (2018)

  27. Patel, K. S., Rajesh Ranjan, Maruthi, N., Deshpande, S., & Narasimha, R. Predictions of aero-thermal loading on an HPT stator blade of a typical small turbofan engine. 19th AeSI CFD Symposium (2017)

  28. Rajesh Ranjan, Deshpande, S., & Narasimha, R. A critical comparison of RANS, LES, Hybrid LES/RANS and DNS studies of the flow past a low pressure turbine blade in a cascade. 18th AeSI CFD Symposium, CP7, 6 pages (2016)

  29. Rajesh Ranjan, Rakshith, B., Deshpande, S., & Narasimha, R. A RANS study of optimal low-drag wings for tractor propeller-driven aircraft. 7th Symposium on Applied Aerodynamics and Design of Aerospace Vehicles (SAROD-2015), CP180, 4 pages

  30. Rajesh Ranjan, Deshpande, S., & Narasimha, R. The effects of curvature on the turbulent boundary layer in flow past turbine blades. 16th AeSI CFD Symposium (2014), CP29, 5 pages

  31. Rajesh Ranjan, Deshpande, S., & Narasimha, R. Numerical methodology for simulating flows over turbine blades. 14th Asian Congress of Fluid Mechanics, Vol. 2, pp. 515–521 (2013)

  32. Rajesh Ranjan, Deshpande, S., & Narasimha, R. DNS of flow past LPT blades. 15th AeSI CFD Symposium (2013)

  33. Deshpande, S., Baig, R., Rajesh Ranjan, Nikam, K., & Lagu, R. CFD simulations of horizontal axis wind turbine (HAWT) blades for variation with wind speed. 2nd National Conference on CFD Applications in Power and Industry Sectors (2009)

  34. Khare, A., Baig, R., Rajesh Ranjan, Shah, S., Pavithran, S., Nikam, K., & Moitra, A. Computational simulation of flow over a high lift trapezoidal wing. IISc Centenary International Conference and Exhibition on Aerospace Engineering (ICEAE, 2009)

CONFERENCE PRESENTATIONS

  1. Chanda, S., Tiwari, A., Kumawat, S., Tripathi, A., & Rajesh Ranjan. Continuum simulation of granular flows in rotating cylinder and hopper flows. DAE-BRNS Symposium on Advances in Atomistic and Continuum Modeling (DAE-SAACM 2024), Mumbai

  2. Kumar, P., & Rajesh Ranjan. Prediction of shocks using a consistent PINN-based approach. Annual Meeting of EMS Activity Group on Scientific Machine Learning (2025)

  3. Kumar, P., Tongaria, M., & Rajesh Ranjan. Improving turbulent flow datasets using residual-based attention PINN (RBA-PINN). Mathematical and Scientific Machine Learning (MSML), 2025

  4. Rajesh Ranjan. HPC in the design of transport vehicles: Turboprops, bullet trains, and hyperloops. High-performance Computing Symposium, 2025 (Invited talk)

  5. Aggarwal, A., Kushari, A., & Rajesh Ranjan. Effect of curvature on thermal and pressure loads in hypersonic flow over double wedge. Conference Presentation, 2024

  6. Rajesh Ranjan. A GPU-enabled 3D LES solver for low subsonic to hypersonic flow computations. Computations of High-Speed, Turbulent, and Complex Flows (CHTC 2024), IIT Hyderabad (Invited paper)

  7. Rajesh Ranjan. Cloud computing for CFD simulations: Current status and challenges. Australia-India Workshop on Privacy-Enhancing Cryptographic Techniques for Cloud Computing (AICCTP 2024), IIT Kanpur (Invited talk)

  8. Rajesh Ranjan. Generalized physics-informed neural network approach for compressible flows with shocks. Indo-Japanese Collaborative Workshop on CFD-based AI and HPC (2024, Invited talk)

  9. Vanipenta, S., Chauhan, J., & Rajesh Ranjan. Cavity-based passive control approaches for SWBLI in scramjets. Conference Presentation, 2024

  10. Maruthi, N. H., Rajesh Ranjan, Deshpande, S. M., Narasimha, R., Naditale, S. R. T., & Sharma, B. Performance of a compressible DNS code on latest GPU architectures. NVIDIA GPU Technology Conference (GTC 2019), San Jose, USA

  11. Maruthi, N. H., Rajesh Ranjan, Deshpande, S. M., Narasimha, R., Sharma, B., & Naditale, S. R. T. GPU-acceleration of an unstructured compressible DNS code for realistic applications. NVIDIA GPU Technology Conference (GTC 2018), San Jose, USA

  12. Maruthi, N. H., Rajesh Ranjan, Deshpande, S. M., Narasimha, R., Sharma, B., & Naditale, S. R. T. GPU acceleration of a DNS code for gas turbine blade simulations. Computational Science Symposium, Bengaluru (2017). Best paper award

  13. Rajesh Ranjan, & Narasimha, R. Quasi-laminar theory for relaminarization in a high-Re highly accelerated turbulent flow. 8th European Postgraduate Fluid Dynamics Conference, Warsaw, Poland (2016)

  14. Rajesh Ranjan, Deshpande, S. M., & Narasimha, R. ANUROOP: a new computational tool for tackling the fluid-dynamical zoo that resides on a gas-turbine blade. JNCASR In-House Symposium, Poster Presentation (2014)

  15. Rajesh Ranjan, Deshpande, S. M., & Narasimha, R. Understanding flow past a low-pressure turbine blade. TWAS ROCASA Regional Conference of Young Scientists, Poster Presentation (2014)

  16. Rajesh Ranjan, Deshpande, S. M., & Narasimha, R. Flow past a gas turbine blade as seen by DNS. Fluids Days, IISc, Bengaluru (2013), Poster Presentation

  17. Rajesh Ranjan, Singh, A., Nikam, K., Goldberg, U., Peroomian, O., Gupta, V., & Chakravarthy, S. Numerical prediction capability of current-generation CFD technology/codes for high-lift configurations. 1st AIAA CFD High Lift Prediction Workshop (HiLIFTPW-1), Chicago, USA (2010)

  18. Shinde, G., Khare, A., Rajesh Ranjan, & Shah, S. NASA trapezoidal wing CFD simulations for lift and drag predictions and scalability benchmarks on Eka. Symposium on Promotion of Indigenous CFD in Engineering Sciences (SPICES-2009), Pune, India

  19. Rajesh Ranjan, Singh, A., Khare, A., Nikam, K., Goldberg, U., Peroomian, O., & Chakravarthy, S. Prediction of drag for wing-body-horizontal configurations representative of transonic transport. 4th AIAA CFD Drag Prediction Workshop, San Antonio, TX (2009)

COPYRIGHT & NOVEL APPROACH

content

COPYRIGHT of DNS CODE "ANUROOP"

content

Novel Approach for Stability Analysis