[1] Shukla, A., Upadhyay, A., Thakur, A. D., & Raj, R., “Method for Developing Tunable Wettability Surfaces”. Application Number: 202531005502, Date: 23/01/2025. (Filed)
[2] Alam, M. Q., Upadhyay, A., Assam, A., & Raj, R., “Submerged Nozzle and Silencer Therefor”. Application Number: 202531106299, Date: 03/11/2025. (Filed)
[1] Upadhyay, A., Hazra, S. K., Alam, M. Q., & Raj, R., “Damped Harmonic Oscillator Framework for Boiling Acoustics: Insights from Single Vapor Bubble Experiments”. (Under review)
[2] Shukla, A., Upadhyay, A., Thakur, A. D., & Raj, R., “Eco-friendly Dip-Coating Strategy for Scalable and Durable Superhydrophobic Aluminum Surfaces”. (Under review)
[3] Suriyaprasaad, B., Upadhyay, A., Thakur, A., & Raj, R., “A Roadmap for Decoding the Sound of Boiling”. (First revision submitted on 20/10/2025)
[4] Maurya, A. K., Alam, M. Q., Upadhyay, A., Hazra, S. K., Raj, R., & Jha, R., “Decoding Bubble Acoustic Emissions in Multiphase Flows Using Reconfigurable Optical Hydrophone”. (Accepted in “APL Engineering Physics” on 21/10/2025)
[5] Suriyaprasaad, B., Upadhyay, A., Thakur, A., & Raj, R. (2025). “Explainable Boiling Acoustics Analysis using Grad-CAM and YAMNet for Robust Pool Boiling Regime Classification”, Applied Thermal Engineering, 127220. Link
[6] Alam, M. Q., Upadhyay, A., Assam, A., & Raj, R. (2025). “On the Origin and Nature of Acoustic Emissions from Bubbles Departing an Underwater Nozzle”, Physics of Fluids, 37(4). Link
[7] Upadhyay, A., Kumar, B., & Raj, R. (2024). “Ionic Liquid as a Cosurfactant for Critical Heat Flux Enhancement during Boiling with Aqueous Surfactant Solutions”, Applied Thermal Engineering, 122962. Link
[8] Upadhyay, A., Hazra, S. K., Assam, A., & Raj, R. (2023). “Review of the Current Status and the Potential of Machine Learning Tools in Boiling Heat Transfer”, Numerical Heat Transfer, Part B: Fundamentals, 1-44. Link
[9] Upadhyay, A., Kumar, B., Kumar, N., & Raj, R. (2023). “Simultaneous Enhancement of Critical Heat Flux and Heat Transfer Coefficient via In-Situ Deposition of Ionic Liquids during Pool Boiling”, International Journal of Heat and Mass Transfer, 208, 124066. Link
[1] Suriyaprasaad, B.*, Upadhyay, A., Thakur, A., & Raj, R., “Interpretable and Robust Acoustic-Based Classification of Boiling Regime via Transfer Learning,” Proceedings of the 1st International Conference on Thermofluids Engineering, IIT (ISM) Dhanbad, Dhanbad, India, October 10-11, 2025. *Presenter (Oral)
[2] Suriyaprasaad, B., Upadhyay, A.*, & Raj, R., “Boiling Regime Classification via Principal Component Analysis on Bubble Images and Acoustics,” Proceedings of the 27th National and 5th International ISHMT-ASTFE Heat and Mass Transfer Conference, IIT Patna, Patna-801103, India, December 14-17, 2023. *Presenter (Poster)
[3] Alam, M. Q.*, Upadhyay, A., Assam, A., & Raj, R., “Improving Acoustic Emission Modeling of Underwater Bubble Detachment by Accounting for Compressibility Effects,” Proceedings of the 27th National and 5th International ISHMT-ASTFE Heat and Mass Transfer Conference, IIT Patna, Patna-801103, India, December 14-17, 2023. *Presenter (Oral)
[4] Upadhyay, A.*, Kumar, N., Pathak, M., & Raj, R., “Numerical Simulation of Bubble Behavior during Pool Boiling with Foaming Solutions,” Proceedings of the 26th National and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference, IIT Madras, Chennai, India, December 17-20, 2021. *Presenter (Oral)
[1] Upadhyay, A.*, Hazra, S. K., Quamar, M. Q., & Raj, R., “Acoustic Signature of Isolated Vapor Bubble Nucleating from a Single Cavity,” 2nd International Conference on Micro Nano Fluidics – From Soft Matter to Bioengineering 2025, IIT Guwahati, Guwahati, India, October 31 – November 02, 2025. *Springer Best Presentation Award (Oral)
[2] Shukla, A.*, Upadhyay, A., Qadeer, M., Thakur, A. D., and Raj, R., “Scalable Immersion-Based Method for Developing Robust Superhydrophobic Aluminium Surfaces,” 2nd International Conference on Micro Nano Fluidics – From Soft Matter to Bioengineering 2025, IIT Guwahati, Guwahati, India, October 31 – November 02, 2025. *Presenter (Poster)
[3] Azad, R.*, Sharma, T., Upadhyay, A., Daschakraborty, S., & Raj, R., “Surface Activity of Ethanol in Water: A Combined Molecular and Experimental Study,” 2nd International Conference on Micro Nano Fluidics – From Soft Matter to Bioengineering 2025, IIT Guwahati, Guwahati, India, October 31 – November 02, 2025. *Presenter (Oral)
[4] Upadhyay, A.*, Raza, M. Q., Kumar, N., & Raj, R., “Sound of Bubble Departure in Adverse Gravity Conditions,” 14th Asian Microgravity Symposium 2024, IIT Madras, Chennai, India, December 1 – 6, 2024. *Best Presentation Award (Visual Microgravity Contest)
[5] Upadhyay, A.*, Raza, M. Q., Kumar, N., & Raj, R., “Enhancing Boiling Performance in Adverse Gravity Conditions with Mixtures of Surfactants and Ionic Liquids,” 14th Asian Microgravity Symposium 2024, IIT Madras, Chennai, India, December 1 – 6, 2024. *Presenter (Oral)
[6] Alam, M. Q.*, Upadhyay, A., Assam, A., & Raj, R., “Investigation of Bubble Acoustics via Experimental, Analytical, and Computational Fluid Dynamics Approaches,” Proceedings of the Annual AeSI CFD Symposium 2024, Birla Institute of Technology Mesra, Ranchi, August 11 – 13, 2024. *Presenter (Oral)
[7] Shukla, A.*, Upadhyay, A., Qadeer, M., Thakur, A. D., & Raj, R., “Advancing Two-Phase Energy Systems with Ionic Liquid-Based Coating Technologies,” International Conference on Advancement in Thermal-Spray (ICOAT) 2024, Indian Institute of Technology Patna, July 18 – 21, 2024. *Presenter (Oral)
[8] Upadhyay, A.*, Kumar, B., & Raj, R., “Potential of Soluble Molecular Additives in Boiling-Based Thermal Management Systems,” 4th Conference on Micro Flow and Interfacial Phenomena (µFIP), The Hong Kong Polytechnic University, Hong Kong, June 20 – 24, 2024. *Presenter (Oral)
[9] Alam, M. Q.*, Upadhyay, A., Sinha, K. N. R., Kumar, V., Assam, A., Thakur, T., & Raj, R.*, “Acoustic Characterization of Bubbles for In-Situ Prediction and Control of Boiling Heat Transfer Regimes,” 11th International Conference on Boiling and Condensation Heat Transfer, ICBCHT-2023, University of Edinburgh, May 15-17, 2023. *Presenter (Oral)
[10] Upadhyay, A.*, Kumar, B., & Raj, R., “Simultaneous Enhancement in Pool Boiling CHF and HTC with the Aqueous Solutions of Mixture of SDS and [C2mim][Cl],” Indian Chemical Engineering Congress & 75th Annual Session of Indian Institute of Chemical Engineers, CHEMCON - 2022, Harcourt Butler Technical University Kanpur, December 27 – 30, 2022. *Presenter (Oral)
[11] Kumar, B.*, Upadhyay, A., & Raj, R., “Synergistic Effect of Ionic Liquid on the Foamability of Aqueous Surfactant Solutions,” Indian Chemical Engineering Congress & 75th Annual Session of Indian Institute of Chemical Engineers, CHEMCON - 2022, Harcourt Butler Technical University Kanpur, December 27 – 30, 2022. *Presenter (Oral)
[12] Alam, M. Q.*, Upadhyay, A., Assam, A., & Raj, R., “Numerical Investigation of Passive Acoustic Emissions during Bubble Departure from an Underwater Nozzle,” Indian Chemical Engineering Congress & 75th Annual Session of Indian Institute of Chemical Engineers, CHEMCON - 2022, Harcourt Butler Technical University Kanpur, December 27 – 30, 2022. *Presenter (Oral)
[13] Upadhyay, A.*, Kumar, B., & Raj, R., “Understanding the Role of Counterions of Imidazolium-based Ionic Liquids on Boiling Heat Transfer,” International Chemical Engineering Conference 2022, Indian Institute of Technology Patna, November 12 – 13, 2022. *Best Presentation Award (Oral)
[14] Upadhyay, A.*, Kumar, A., Siddiqui, T. U., Khan, M. M., & Gupta, Y., “Finite Element Analysis of Friction Parameters on Aluminium Alloys in Impression Die Cold Forging: A Review,” 3rd International Conference on Academic Research in Engineering, Management and Information Technology ICAREMIT-2018, Faculty of Engineering and Technology, M. J. P. Rohilkhand University, Bareilly, February 17 – 19, 2018. *Presenter (Oral)