All Stories

  1. Analyzing the influence of bump‐shaped roughness elements on the thermal performance and hydraulic characteristics of equilateral triangular solar air heaters

    Article • Environmental Progress & Sustainable Energy, December 2025, Wiley

    Rajneesh Kumar

  2. Impact of various cross-sectional flow passages on the performance of a solar-based thermal energy conversion system

    Article • Renewable Energy, August 2024, Elsevier

    Rajneesh Kumar

  3. Effect of jet-impingement and surface roughness on performance of solar air heater: Experimental study and its optimization

    Article • Expert Systems with Applications, March 2024, Elsevier

    Rajneesh Kumar, Dr. Sushant Thakur

  4. Improved solar-thermal heat exchanger for space heating with surface roughness: A numerical parametric investigation and its optimization

    Article • Renewable Energy, March 2024, Elsevier

    Rajneesh Kumar

  5. Application of triangular duct in solar-assisted air-heating system with surface roughness: a numerical investigation

    Article • Environmental Science and Pollution Research, July 2023, Springer Science + Business Media

    Rajneesh Kumar

  6. An experimental investigation of new roughness patterns (dimples with alternative protrusions) for the performance enhancement of solar air heater

    Article • Renewable Energy, July 2023, Elsevier

    Rajneesh Kumar

  7. Application of triangular duct in solar assisted air-heating system with surface roughness: A numerical investigation

    Article • January 2023, Research Square

    Rajneesh Kumar

  8. A novel hybrid approach to improve the performance of the solar collector: combined effect of roughness and duct modification

    Article • Energy Sources Part A Recovery Utilization and Environmental Effects, November 2022, Taylor & Francis

    Rajneesh Kumar

  9. Identification of barriers and drivers to implementation of solar drying technologies

    Article • Journal of Thermal Analysis and Calorimetry, October 2022, Springer Science + Business Media

    Rajneesh Kumar

  10. A novel design for solar collector used for water heating application having nanofluid as working medium: CFD modeling and simulation

    Article • Environmental Science and Pollution Research, August 2022, Springer Science + Business Media

    Rajneesh Kumar

  11. Theoretical spectroscopic signature of synephrine using DFT and the effect of hydrogen removal

    Article • Phase Transitions, June 2022, Taylor & Francis

    Rajneesh Kumar

  12. A Novel Design for solar collector used for water heating application having nanofluid as working medium: CFD modeling and simulation

    Article • March 2022, Research Square

    Rajneesh Kumar

  13. Performance analysis of nanofluid based direct absorption solar collector of different configurations: A two-phase CFD modeling

    Article • Energy Sources Part A Recovery Utilization and Environmental Effects, January 2022, Taylor & Francis

    Rajneesh Kumar

  14. First and second order analysis of functionally graded composite material

    Article • Materials Today Proceedings, January 2022, Elsevier

    Rajneesh Kumar

  15. Jet-impinged based solar air heating system: An overview of flow dynamics and heat transfer phenomena

    Article • Materials Today Proceedings, January 2022, Elsevier

    Rajneesh Kumar

  16. Solar air heater having multiple V-ribs with Multiple-Symmetric gaps as roughness elements on Absorber-Plate: A parametric study

    Article • Sustainable Energy Technologies and Assessments, December 2021, Elsevier

    Rajneesh Kumar

  17. Spectroscopic Investigation of Electron-Releasing Functional Groups Substituted N-Iso-Butyl, S-2-Nitro-1-Phenylethyl Dithiocarbamate – A DFT Approach

    Article • Polycyclic Aromatic Compounds, October 2021, Taylor & Francis

    Rajneesh Kumar, Professor Goutam Brahmachari

  18. IoT based solar powered smart irrigation system

    Article • Journal of Physics Conference Series, October 2021, Institute of Physics Publishing

    Rajneesh Kumar

  19. Role of Artificial Roughness in the Performance Improvement of Solar Air Heaters

    Article • August 2021, Springer Science + Business Media

    Rajneesh Kumar

  20. A comprehensive parametric investigation of hemispherical cavities on thermal performance and flow-dynamics in the triangular-duct solar-assisted air-heater

    Article • Renewable Energy, August 2021, Elsevier

    Rajneesh Kumar

  21. Conformational and vibrational spectroscopic investigation of N-n‑butyl, S-2-nitro-1-(p-tolyl)ethyl dithiocarbamate – a bio-relevant sulfur molecule

    Article • Journal of Molecular Structure, August 2021, Elsevier

    Rajneesh Kumar, Professor Goutam Brahmachari

  22. A comprehensive study on the progressive development and applications of solar air heaters

    Article • Solar Energy, July 2021, Elsevier

    Rajneesh Kumar

  23. Unconventional solar air heater with triangular flow-passage: A CFD based comparative performance assessment of different cross-sectional rib-roughnesses

    Article • Renewable Energy, July 2021, Elsevier

    Rajneesh Kumar

  24. Exergetic performance estimation for roughened triangular duct used in solar air heaters

    Article • Journal of Thermal Analysis and Calorimetry, May 2021, Springer Science + Business Media

    Rajneesh Kumar

  25. Experimental investigation for heat and flow characteristics of solar air heater having symmetrical gaps in multiple-arc rib pattern as roughness elements

    Article • Experimental Heat Transfer, April 2021, Taylor & Francis

    Rajneesh Kumar

  26. Heat augmented due to array of protrusions on absorber plate in solar heat exchanger

    Article • Materials Today Proceedings, January 2021, Elsevier

    Rajneesh Kumar

  27. Effect of providing gap in multiple-arc rib-roughened solar air heater - Part 1

    Article • Journal of Mechanical Science and Technology, May 2020, Springer Science + Business Media

    Rajneesh Kumar

  28. A Note on the Comparative Analysis Between Rectangular and Modified Duct Heat Exchanger

    Article • Journal of Heat Transfer, February 2020, ASME International

    Rajneesh Kumar

  29. Innovatively Arranged Curved-Ribbed Solar-Assisted Air Heater: Performance and Correlation Development for Heat and Flow Characteristics

    Article • Journal of Solar Energy Engineering, January 2020, ASME International

    Rajneesh Kumar

  30. Performance evaluation and optimization of solar assisted air heater with discrete multiple arc shaped ribs

    Article • Journal of Energy Storage, December 2019, Elsevier

    Rajneesh Kumar

  31. Performance improvement and development of correlation for friction factor and heat transfer using computational fluid dynamics for ribbed triangular duct solar air heater

    Article • Renewable Energy, February 2019, Elsevier

    Rajneesh Kumar

  32. Effect of Dimple Intrusions and Curvature Radius of Rounded Corner Triangular Duct on Fluid Flow and Heat Transfer

    Article • Journal of Thermal Science and Engineering Applications, January 2019, ASME International

    Rajneesh Kumar

  33. Simulation of Flow and Heat Transfer in Triangular Cross-Sectional Solar-Assisted Air Heater

    Article • Journal of Solar Energy Engineering, September 2018, ASME International

    Rajneesh Kumar

  34. Effect of Rounded Corners on Heat Transfer and Fluid Flow Through Triangular Duct

    Article • Journal of Heat Transfer, August 2018, ASME International

    Rajneesh Kumar

  35. Study of array plasma antenna parameters

    Article • AIP Advances, April 2018, American Institute of Physics

    Rajneesh Kumar

  36. Investigation of heat transfer augmentation and friction factor in triangular duct solar air heater due to forward facing chamfered rectangular ribs: A CFD based analysis

    Article • Renewable Energy, January 2018, Elsevier

    Rajneesh Kumar

  37. Numerical investigation of heat transfer and friction factor in ribbed triangular duct solar air heater using Computational fluid dynamics (CFD)

    Article • Journal of Mechanical Science and Technology, January 2018, Springer Science + Business Media

    Rajneesh Kumar

  38. A parametric analysis of rectangular rib roughened triangular duct solar air heater using computational fluid dynamics

    Article • Solar Energy, November 2017, Elsevier

    Rajneesh Kumar

  39. Effect of apex angle variation on thermal and hydraulic performance of roughened triangular duct

    Article • International Communications in Heat and Mass Transfer, August 2017, Elsevier

    Rajneesh Kumar

  40. Experimental and Computational Fluid Dynamics Study on Fluid Flow and Heat Transfer in Triangular Passage Solar Air Heater of Different Configurations

    Article • Journal of Solar Energy Engineering, June 2017, ASME International

    Rajneesh Kumar

  41. Computational fluid dynamics based study for analyzing heat transfer and friction factor in semi-circular rib-roughened equilateral triangular duct

    Article • International Journal of Numerical Methods for Heat & Fluid Flow, April 2017, Emerald

    Rajneesh Kumar

  42. Heat transfer augmentation and flow characteristics in ribbed triangular duct solar air heater: An experimental analysis

    Article • International Journal of Green Energy, March 2017, Taylor & Francis

    Rajneesh Kumar

  43. Erratum to “A parametric study of the 2D model of solar air heater with elliptical rib roughness using CFD”

    Article • Journal of Mechanical Science and Technology, March 2017, Springer Science + Business Media

    Rajneesh Kumar

  44. A parametric study of the 2D model of solar air heater with elliptical rib roughness using CFD

    Article • Journal of Mechanical Science and Technology, February 2017, Springer Science + Business Media

    Rajneesh Kumar

  45. Thermal and fluid dynamic characteristics of flow through triangular cross-sectional duct: A review

    Article • Renewable and Sustainable Energy Reviews, August 2016, Elsevier

    Rajneesh Kumar

  46. Numerical Simulation of Flow Through Equilateral Triangular Duct Under Constant Wall Heat Flux Boundary Condition

    Article • Journal of The Institution of Engineers (India) Series C, June 2016, Springer Science + Business Media

    Rajneesh Kumar

  47. Experimental investigation of gas heating and dissociation in a microwave plasma torch at atmospheric pressure

    Article • Energy Conversion and Management, February 2014, Elsevier

    Rajneesh Kumar

  48. Experimental validation of local thermal equilibrium in a MW plasma torch for hydrogen production

    Article • International Journal of Hydrogen Energy, November 2013, Elsevier

    Rajneesh Kumar

  49. Device fabrication of insoluble donor–acceptor–donor structured molecule by pulsed laser deposition: a comparative study using different laser source

    Article • June 2013, SPIE

    Professor Praveen C Ramamurthy, Rajneesh Kumar

  50. Effects of magnetic field on oscillatory structures in laser-blow-off plasma

    Article • Physics Letters A, December 2012, Elsevier

    Rajneesh Kumar

  51. Experimental investigation of different structures of a radio frequency produced plasma column

    Article • Physics of Plasmas, April 2010, American Institute of Physics

    Rajneesh Kumar

  52. A reconfigurable plasma antenna

    Article • Journal of Applied Physics, March 2010, American Institute of Physics

    Rajneesh Kumar

  53. Cylindrical stationary striations in surface wave produced plasma columns of argon

    Article • Physics of Plasmas, December 2007, American Institute of Physics

    Rajneesh Kumar