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Core Faculty

S. Ravichandran

Assistant Professor

We apply analytical and numerical techniques to study the fluid dynamics of climate processes, ranging from the microphysics of clouds and the convection-driven melting of sea ice to the flow in and around buildings in urban settings.

Research Interests

Fluid dynamicsThermodynamicsParticle-laden flowsHigh-performance computing

sravichandran@iitb.ac.in

910-222-576514

Transit Building 308

Education

Ph.D.

TIFR Hyderabad, awarded the Geeta Udgaonkar award (Honorable mention) for best PhD thesis in Physics.

B.Tech-M.Tech dual degree

IIT Madras Aerospace Engineering

Publications

Ravichandran, S., & Wettlaufer, J. S. (2024). Prograde and meandering wall modes in rotating Rayleigh–Bénard convection with conducting walls. Journal of Fluid Mechanics, 998, A47.
Kainz, J., Makwana, N. N., Kumar, B., Ravichandran, S., Fries, J., Sardina, G., et al. (2024). Benchmarking Turbulence Models to Represent Cloud-Edge Mixing. arXiv preprint arXiv:2410.03789.
Dasgupta, R., Kumar, A., Ravichandran, S., Roy, A., & Samanta, D. (2024). Spume droplet generation via the Miles instability at a sheared gas liquid interface. 2024 Ocean Sciences Meeting.
Nath, A. V. S., Roy, A., Ravichandran, S., & Govindarajan, R. (2024). Irregular dependence on Stokes number, and nonergodic transport, of heavy inertial particles in steady laminar flows. Physical Review Fluids, 9(1), 014302.
Ichihara, M., Mininni, P. D., Ravichandran, S., Cimarelli, C., & Vagasky, C. (2023). Multiphase turbulent flow explains lightning rings in volcanic plumes. Communications Earth & Environment, 4(1), 417.
Mininni, P. D., Ichihara, M., Ravichandran, S., Cimarelli, C., & Vagasky, C. (2023). Dataset for multiphase turbulent flow explains lightning rings in volcanic plumes.
Singhal, R., Ravichandran, S., & Diwan, S. S. (2023). Turbulent diffusion of scalar and heat in an off-source heated steady round jet. International Journal of Heat and Fluid Flow, 103, 109190.
Ravichandran, S., & Wettlaufer, J. S. (2023). Orientation dynamics of two-dimensional concavo-convex bodies. Physical Review Fluids, 8(6), L062301.
Diwan, S., Reddy, S., Singhal, R., & Ravichandran, S. (2022). Estimation of viral load and infection probability for a "mild" cough using direct numerical simulation. Bulletin of the American Physical Society, 67.
Ravichandran, S., & Govindarajan, R. (2022). Waltz of tiny droplets and the flow they live in. Physical Review Fluids, 7(11), 110512.
Ravichandran, S., Toppaladoddi, S., & Wettlaufer, J. S. (2022). The combined effects of buoyancy, rotation, and shear on phase boundary evolution. Journal of Fluid Mechanics, 941.
Vybhav, G. R., & Ravichandran, S. (2022). Entrainment in dry and moist thermals. Physical Review Fluids, 7(5), 050501.
Ravichandran, S., Picardo, J. R., Ray, S. S., & Govindarajan, R. (2022). Fluid dynamics in clouds: The sum of its parts. Statistical and Nonlinear Physics, 121–143.
Nath, A. V. S., Roy, A., Govindarajan, R., & Ravichandran, S. (2022). Transport of condensing droplets in Taylor-Green vortex flow in the presence of thermal noise. Physical Review E, 105(3), 035101.
Ravichandran, S., & Govindarajan, R. (2022). Instability driven by settling and evaporation in a shear flow: A model for asperitas clouds. Physical Review Fluids, 7(1), 010501.
Ravichandran, S., & Wettlaufer, J. (2022). Charge and mass transfer by inelastic collisions. APS March Meeting Abstracts, S12.005.
Singhal, R., Ravichandran, S., Govindarajan, R., & Diwan, S. S. (2022). Virus transmission by aerosol transport during short conversations. Flow, 2, E13.
Singhal, R., Ravichandran, S., & Diwan, S. S. (2021). Direct numerical simulation of a moist cough flow using Eulerian approximation for liquid droplets. International Journal of Computational Fluid Dynamics, 35(9), 778–797.
Ravichandran, S., & Wettlaufer, J. S. (2021). Melting driven by rotating Rayleigh–Bénard convection. Journal of Fluid Mechanics, 916.
Ravichandran, S., & Wettlaufer, J. (2021). Fluttering and Tumbling of Two-Dimensional Concave/Convex Bodies. APS Division of Fluid Dynamics Meeting Abstracts, M27.008.
Singhal, R., Ravichandran, S., Diwan, S. S., & Brown, G. L. (2021). Reynolds Stress Gradient and Vorticity Fluxes in Axisymmetric Turbulent Jet and Plume. Proceedings of 16th Asian Congress of Fluid Mechanics, 403–411.
Ravichandran, S., Meiburg, E., & Govindarajan, R. (2020). Mammatus cloud formation by settling and evaporation. Journal of Fluid Mechanics, 899, A27.
Diwan, S. S., Ravichandran, S., Govindarajan, R., & Narasimha, R. (2020). Understanding transmission dynamics of COVID-19-type infections by direct numerical simulations of cough/sneeze flows. Transactions of the Indian National Academy of Engineering, 5(2), 255–261.
Ravichandran, S., & Narasimha, R. (2020). Non-Precipitating Shallow Cumulus Clouds: Theory and Direct Numerical Simulation. arXiv preprint arXiv:2004.09631.
Nath, A. V. S., Govindarajan, R., Ravichandran, S., & Roy, A. (2020). Response of Evaporating Droplets to Vortices. APS Division of Fluid Dynamics Meeting Abstracts, P16.007.
Ravichandran, S. (2020). Numerical Simulations of Cumulus and Mammatus Clouds. APS Division of Fluid Dynamics Meeting Abstracts, L01.002.
Ravichandran, S., & Wettlaufer, J. S. (2020). Transient Convective Spin-up Dynamics. Journal of Fluid Mechanics, 897, A24.
Govindarajan, R., Ravichandran, S., Picardo, J. R., Agasthya, L., & Ray, S. S. (2019). Understanding droplet collisions through a model flow: Insights from a Burgers vortex. American Physical Society.
Agasthya, L., Picardo, J. R., Ravichandran, S., Govindarajan, R., & Ray, S. S. (2019). Understanding droplet collisions through a model flow: Insights from a Burgers vortex. Physical Review E, 99(6), 063107.
Ravichandran, S., & Govindarajan, R. (2017). Vortex-dipole collapse induced by droplet inertia and phase change. Journal of Fluid Mechanics, 832, 745–776.
Ravichandran, S., & Govindarajan, R. (2017). Particle-inertia and phase-change induced vortex-dipole collapse. Bulletin of the American Physical Society, 62.
Govindarajan, R., Ravichandran, S., & Meiburg, E. (2017). Settling-driven instabilities with phase-change in mammatus clouds. Bulletin of the American Physical Society, 62.
Ravichandran, S. (2017). The Interplay of Buoyancy Particle Inertia and Phase Change in Vortical Flows Implications for Cloud flows. TIFR Mumbai.
Ravichandran, S., Dixit, H. N., & Govindarajan, R. (2017). Lift-induced vortex dipole collapse. Physical Review Fluids, 2(3), 034702.
Ravichandran, S., Deepu, P., & Govindarajan, R. (2017). Clustering of heavy particles in vortical flows: a selective review. Sādhanā, 1–9.
Govindarajan, R., & Ravichandran, S. (2017). Cloud MicroAtlas. Resonance, 22(3), 269–277.
Deepu, P., Ravichandran, S., & Govindarajan, R. (2017). Caustics-induced coalescence of small droplets near a vortex. Physical Review Fluids, 2(2), 024305.
Swaminathan, R. V., Ravichandran, S., Perlekar, P., & Govindarajan, R. (2016). Dynamics of circular arrangements of vorticity in two dimensions. Physical Review E, 94(1), 013105.
Govindarajan, R., Ravichandran, S., Ray, S., & Deepu, P. (2016). Caustics and the growth of droplets. APS March Meeting Abstracts, K53.005.
Ravichandran, S. (2015). Inertial Particles and Vortices: Implications for Cloud Flows. Procedia IUTAM, 15, 236–241.
Ravichandran, S., Dixit, H., & Govindarajan, R. (2015). NonBoussinesq effects on vorticity and kinetic energy production. APS Division of Fluid Dynamics Meeting Abstracts, A18.005.
Govindarajan, R., Ravichandran, S., Ray, S., & Deepu, P. (2015). Caustics and collisions of inertial particles. APS Division of Fluid Dynamics Meeting Abstracts, M4.009.
Ravichandran, S., & Govindarajan, R. (2015). Caustics and clustering in the vicinity of a vortex. Physics of Fluids, 27(3), 033305.
Ravichandran, S., Perlekar, P., & Govindarajan, R. (2014). Attracting fixed points for heavy particles in the vicinity of a vortex pair. Physics of Fluids, 26(1), 013303.
Govindarajan, R., Bhowmik, M., Singh, M., Ravichandran, S., Picardo, J., et al. Droplet growth and collisions due to turbulence and gravity.
Govindarajan, R., Ravichandran, S., Picardo, J., Ray, S. S., & Ganga, S. Raindrops and Turbulence in a Cloud.

Current Students

Dhrubojyoti Roy

PhD

TBU

Jayanth Shenoy

PhD

TBU

Kaustuv Lahiri

PhD

I work on the microphysics of clouds and their implications on lightning. This involves studying the dynamics of lightning at both the small (O(1 cm – 1 m)) scales and the larger scales (O(10 km – 1000 km)). I approach the problems from the perspective of fluid dynamics and look at the interaction between multiple phases (vapor, liquid/solid) in turbulent ..

Md Atif Mustafa Khan

PhD

TBU