Publications
Journal Papers (published/accepted)
S. De, Aditya Anand, and Sourabh S. Diwan, 2023, “A wavelet-based detector function for characterizing intermittent velocity signals”, Exp Fluids 64, 180
Rohit Singhal, S. Ravichandran, Sourabh S. Diwan, 2023, “Turbulent diffusion of scalar and heat in an off-source heated steady round jet”, International Journal of Heat and Fluid Flow, Volume 103, 109190
G. S. Bhat and Sourabh S. Diwan, 2023 “Laboratory experiments and numerical simulations mimicking convective cloud-like flows” Sadhana, Accepted for publication. (Invited article for the special issue to honour Prof Narasimha’s contributions to Fluid Dynamics)
Rohit Singhal, S. Ravichandran, Rama Govindarajan and Sourabh S. Diwan, 2022 “Virus transmission by aerosol transport during short conversations”, FLOW, 2, E13 (Altmetric Attention Score: 180 – top 5%, Covered by 21 news outlets)
Rohit Singhal, S. Ravichandran, and Sourabh S. Diwan, 2022 “Direct Numerical Simulation of a Moist Cough Flow using Eulerian Approximation for Liquid Droplets”, Int. J. Comput. Fluid Dyn., 35(9), 778-797 (Invited article for a special issue on “CFD and COVID 19”)
A.B. Aadhishwaran and Sourabh S. Diwan, 2021 “Predominance of pressure transport in spatial energy budget for a mixing layer approaching absolute instability”, Phys. Rev. Fluids, 6, L091901
A. Samson, Karthik Naicker and Sourabh S. Diwan, 2021 “Instability mechanisms and intermittency distribution in adverse pressure gradient attached and separated boundary layers”, Phys. Fluids, 33, 094106 (Invited article: Special Topic on Tribute to Frank M. White on his 88th anniversary)
Srinivas Kirthy K. and Sourabh S. Diwan, 2021 “Energy budget analysis and neutral curve characteristics for the linear instability of Couette–Poiseuille flow”, Phys. Fluids, 33, 034102.
Sourabh S. Diwan and Jonathan F. Morrison, 2021 “Intermediate Scaling and Logarithmic Invariance in Turbulent Pipe Flow”, J. Fluid Mech., 913, R1.
Sourabh S. Diwan, S. Ravichandran, Rama Govindarajan, Roddam Narasimha, 2020 “Understanding Transmission Dynamics of COVID‑19‑Type Infections by Direct Numerical Simulations of Cough/Sneeze Flows”, Trans. Indian Natl. Acad. Eng., June-3, 1-7.
Aditya Anand and Sourabh S. Diwan, 2020 “Time‑frequency analysis for two cases of boundary‑layer transition induced by random distributed roughness”, Exp. Fluids, 61:60.
Sourabh S. Diwan and Jonathan F. Morrison, 2017 “Spectral structure and linear mechanisms in a rapidly-distorted boundary layer”, Int. J. Heat Fluid Flow, 67, 63-73. (Invited article for the special issue: Symposium on Experiments and Simulations in Fluid Dynamics Research)
Sourabh S. Diwan, 2015 “Necessary conditions for spatial inviscid instability”, Proc. Roy. Soc. A, 471, 20140607.
Sourabh S. Diwan, P. Prasanth, K. R. Sreenivas, S. M. Deshpande and Roddam Narasimha, 2014 “Cumulus-type flows in the laboratory and on the computer: simulating cloud form, evolution and large-scale structure”, Bull. Amer. Meteor. Soc., 95(10), 1541-1548. (Selected under ‘In Box’ section meant for articles with ‘Insights and Innovations’).
Sourabh S. Diwan and O. N. Ramesh, 2012 “Relevance of local parallel theory to the linear stability of laminar separation bubbles” J. Fluid Mech., 698, 468-478.
Sourabh S. Diwan, Roddam Narasimha, G. S. Bhat and K. R. Sreenivas, 2011 “Laboratory studies of anomalous entrainment in cumulus cloud flows” J. Phys.: Conf. Series, 318, 072014.
Roddam Narasimha, Sourabh S. Diwan, Subrahamanyam Duvvuri, K. R. Sreenivas and G. S. Bhat, 2011 “Laboratory simulations show diabatic heating drives cumulus-cloud evolution and entrainment” Proc. Natl. Acad. Sci. USA, 108(39), 16164-16169. (Listed in “This Week in PNAS” with a media summary entitled ‘Laboratory cloud simulations reveal key role of internal heating’)
Sourabh S. Diwan and O. N. Ramesh, 2009 “On the origin of the inflectional instability of a laminar separation bubble”, J. Fluid Mech., 629, 263-298.
Sourabh S. Diwan and O. N. Ramesh, 2007 “Laminar separation bubbles: Dynamics and control”, Sadhana (Proceedings of Indian Academy of Sciences), 32, 103-109.
ArXiv Papers
Robin Joseph, P. Phani Kumar, Sourabh S. Diwan 2023 “Delaying transition induced by a strip of distributed roughness using additional fine grit roughness” arXiv:2302.09797
Kirthy K. Srinivas and Sourabh S. Diwan 2022 “Absolute and “upstream” convective instabilities in plane Couette-Poiseuille flow” arXiv:2202.08467
Patent (Filed)
Patent Title: Aerofoil bodies for delaying roughness-induced transition of laminar flow of fluids into turbulent flow
Inventors: Robin Joseph, P Phani Kumar, Sourabh S Diwan
Patent No.: Application No 202241046831 (Complete patent filed on 17/8/2022; published on 30/06/2023)
Country: India
Patent Title: Controlling Fluctuating Surface Effects of Turbulent Spots in a Transitional Boundary Layer
Inventors: Sumit Tambe, Satyajit De, Robin Joseph, Sourabh S Diwan
Patent No.: Application No 202441003392 (Complete patent filed on 17/01/2024; published on 09/02/2024)
Country: India
Referred Conference Papers/abstracts (published/accepted)
I. Sai Eswar and Sourabh S. Diwan 2023 “Measurement of turbulent pressure fluctuations in a boundary layer and in the wake of a delta wing” Symposium on Applied Aerodynamics and Design of Aerospace Vehicles (SAROD 2023), DRDL, Hyderabad, February 9-11, 2023.
Rohit Singhal, S. Ravichandran, and Sourabh S. Diwan 2022 “Turbulent Diffusion of Scalar and Heat in an Off-source Heated Steady Round Jet” Proceedings of the 12th International Symposium on Turbulence and Shear Flow Phenomena (TSFP12), Osaka, Japan, July 19–22, 2022.
http://www.tsfp-conference.org/proceedings/proceedings-of-tsfp-12-2022-osaka.html
Abhishek Tyagi, Chandan Kumar A. and Sourabh S. Diwan 2022 “On the Structure of a Turbulent Boundary Layer Perturbed by a Large-eddy Break-up Device” Proceedings of the 12th International Symposium on Turbulence and Shear Flow Phenomena (TSFP12), Osaka, Japan, July 19–22, 2022.
(Invited for contributing to the special issue of Int. J. Heat Fluid Flow – declined)
http://www.tsfp-conference.org/proceedings/proceedings-of-tsfp-12-2022-osaka.html
Sourabh S. Diwan and Jonathan F. Morrison, 2021 “Intermediate scaling for streamwise velocity in wall turbulence” 25th International Congress of Theoretical and Applied Mechanics 2020+ 1 to be held from 22-27 August 2021 (virtual).
Srinivas Kirthy K., Sourabh S. Diwan and O. N. Ramesh, 2021 “Wave Packet Dispersion in Inflectional and Non-inflectional Flows” Laminar-turbulent Transition In IUTAM Laminar-Turbulent Transition, IUTAM Book series 38, pp451-458, Springer Nature.
Robin Joseph and Sourabh S. Diwan, 2021 “Growth of Disturbances in a Pre-transitional Boundary Layer Downstream of Distributed Surface Roughness”, Proceedings of 16th Asian Congress of Fluid Mechanics (Ed. L. Venkatakrishnan et al.), Lecture Notes in Mechanical Engineering, Springer Nature, pp393-402.
Rohit Singhal, S. Ravichandran, Sourabh S. Diwan, and Garry L. Brown, 2021 “Reynolds Stress Gradient and Vorticity Fluxes in Axisymmetric Turbulent Jet and Plume”, Proceedings of 16th Asian Congress of Fluid Mechanics, (Ed. L. Venkatakrishnan et al.), Lecture Notes in Mechanical Engineering, Springer Nature, pp403-411.
Aditya Anand and Sourabh S. Diwan, 2019 “Two scenarios for bypass transition in a boundary layer subjected to a localized patch of distributed surface roughness”, Proceedings of the 11th International Symposium on Turbulence and Shear Flow Phenomena (TSFP11) Southampton, UK.
Sourabh S. Diwan and Jonathan F. Morrison, “Reynolds-number dependence of the Townsend- Perry ‘constant’ in wall turbulence”, Proceedings of the 11th International Symposium on Turbulence and Shear Flow Phenomena (TSFP11).
Jonathan F. Morrison and Sourabh S. Diwan, 2017 “Inner-outer interaction in a rapidly sheared boundary layer”. Proceedings of the 10th International Symposium on Turbulence and Shear Flow Phenomena (TSFP10) Chicago, USA.
Other Conference Publications (select list)
Sourabh S. Diwan, Rohit Singhal, S. Ravichandran, Rama Govindarajan and Roddam Narasimha 2020 “Direct numerical simulation of turbulent flows typical of human coughing and talking” Proceedings of IConACES2020, pp170 (Keynote Address).
Sourabh S. Diwan, Rohit Singhal, S. Ravichandran, Rama Govindarajan and Roddam Narasimha 2020 “DNS of mild cough to understand effect of liquid content on cough trajectory and evaporation” Complex Fluids 2020, IIT Bombay (Invited talk).
3. Aditya Anand and Sourabh S. Diwan, “Bypass transition in a boundary layer past a localized strip of distributed roughness” American Physical Society-Division of Fluid Dynamics 71st Annual Meeting, Atlanta, USA, 18-20 November 2018.
Referred Conference Papers
Sourabh S. Diwan and O. N. Ramesh, 2006 “On the Late Stages of Transition in Laminar Separation Bubbles”, Proceedings of the 11th Asian Congress of Fluid Mechanics, Kuala Lumpur, Malaysia, 22-25 May 2006.
Sourabh S. Diwan, S. J. Chetan and O. N. Ramesh, 2006 “On the bursting criterion for laminar separation bubbles” In Fluid Mechanics and Its Applications (Proceedings of IUTAM symposium 2004 Ed. Rama Govindarajan), Springer, pp401-407.
Popular science articles/news articles
Sourabh S. Diwan 2021 “Should you mask up at home?” Deccan Herald, (May 20, 2021).
Kumaraswamy, K. Sinha, J. Murallidharan, Sourabh S. Diwan and G. Menon 2021 “Ventilation and Transmission” Indian Express (July 1, 2021).
Sourabh S. Diwan and Aloke Kumar 2021 “Professor Roddam Narasimha (1933-2020): A World-Class Scientist With Deeply Indian Roots” Obituary written for Indic Today (https://www.indictoday.com/long-reads/professor-roddam-narasimha-world-class-scientist-deeply-indian-roots/)
Sourabh S Diwan 2021 “Roddam Narasimha (1933-2020): an engineering scientist par excellence” Obituary written for Vibhava (Mysore Science Foundation Magazine), 4(1), pp2-10.