Pattern-formation & Interfacial-Instabilities Lab
PI-Lab
PI-Dinesh Bhagavatula
Assistant Professor
Room Number: 121 (PI-Lab)
Department of Chemical Engineering and Technology, IIT BHU
Postdoctoral Researcher (University of Florida)
Ph.D. in Chemical Engineering IIT Madras
Contact: dinesh.che@iitbhu.ac.in
Research Interests:
Pattern formation in compliant materials
Resonance phenomena
Interfacial instabilities in multiphase flows in microfluidic channels
Multiphase flows in thin films
Few lectures were delivered as a part of GIAN course in the department of mathematics at IIT Ropar. The videos are available at the following link:
www.iitrpr.ac.in/FD/GIAN-2022/
List of publications
B. Dinesh, J. Livesay, I. B. Ignatius and R. Narayanan, Pattern formation in Faraday instability –experimental validation of theoretical models, The Royal Society, Philosophical Transactions A (Accepted for publication) (https://dx.doi.org/10.1098/rsta.2022.0081).
B. Dinesh, T. Corbin and R. Narayanan, Thin-film Rayleigh-Taylor instability in the presence of a deep periodic corrugated wall, Journal of Fluid Mechanics, Volume 931, Issue R5, 27 October 2021 (https://doi.org/10.1017/jfm.2021.960).
B. Dinesh and R. Narayanan, Nature of branching in electrohydrodynamic instability, accepted for a publication in Physical Review Fluids, Volume 6, Issue: 5, 10 May 2021 (doi.org/10.1103/PhysRevFluids.6.054001).
B. Dinesh and R. Narayanan, Branching behavior of the Rayleigh-Taylor instability in linear viscoelastic fluids, Journal of Fluid Mechanics, Volume 915, 17 March 2021 (doi.org/10.1017/jfm.2021.80).
B. Dinesh and S. Pushpavanam, Stability of stratified flows through neo-Hookean soft-gel-coated parallel walls, PHYSICS OF FLUIDS, Volume 30, ISSUE: 10, 11 October 2018 (doi.org/10.1063/1.5045658).
B. Dinesh and S. Pushpavanam, Effect of soluble surfactants on the stability of stratified flows through soft-gel-coated walls, PHYSICAL REVIEW E, Volume 98, Issue: 2, 13 August 2018 (doi.org/10.1103/PhysRevE.98.023106).
B. Dinesh and S. Pushpavanam, Linear stability of layered two-phase flows through parallel soft-gel-coated walls, PHYSICAL REVIEW E, Volume 56, Issue: 14, 31 July 2017, Pages 4145–4155, July 2017 (doi.org/10.1103/PhysRevE.96.013119).
D. S. Pillai, B. Dinesh, T. Sundararajan, S. Pushpavanam, A Viscous Potential Flow model for core-annular flow, APPLIED MATHEMATICAL MODELLING, Volume 40, Issue: 7-8, December 2015, (doi.org/10.1016/j.apm.2015.12.017).
Conferences
M. Varshney and B. Dinesh, The role of a soft-gel on the natural frequencies and in the evolution of Faraday waves at the free surface of a fluid layer. Accepted for an oral talk in APS DFD 22rd November, 2022.
B. Dinesh, Nevin Brosius, T. Corbin and R. Narayanan, The role of a deep wavy wall on the natural frequencies of a fluid interface: theory and experiments. An oral talk in APS DFD 23rd November, 2021.
Igin B Ignatius, B. Dinesh and R. Narayanan, Suppressing Marangoni instability using parametric forcing. An oral talk in APS DFD 22nd November, 2021.
B. Dinesh and R. Narayanan, Rayleigh-Taylor Waves in Viscoelastic Fluids- an Unintuitive Result. An oral talk in AIChE Annual meeting on 9th November, 2021.
B. Dinesh and R. Narayanan, Pattern formation through Rayleigh-Taylor instability in linear viscoelastic compliant media. Accepted for a talk in IMA10, Iași, Romania, 13-17 June 2021.
B. Dinesh, Nevin Brosius and R. Narayanan, Effect of wall corrugation on thin film resonance instability: Theory and Experiments. Accepted for a talk in IMA10, Iași, Romania, 13-17 June 2021.
B. Dinesh and R. Narayanan, Pattern formation through Rayleigh-Taylor instability in linear viscoelastic compliant media. Accepted for a short talk with a poster presentation in ICTAM2021, Milano, Italy, August 22-27, 2021.
B. Dinesh, Nevin Brosius and R. Narayanan, Effect of wall corrugation on thin film resonance instability: Theory and Experiments. Accepted for a short talk with a poster presentation in ICTAM2021, Milano, Italy, August 22-27, 2021.
B. Dinesh and R. Narayanan, Weak nonlinear analysis of Rayleigh-Taylor instability in linear viscoelastic fluids. A poster in Early Career Session in COMPFLU on 10th December 2020.
B. Dinesh, Nevin Brosius and R. Narayanan, Nonlinear Instability of Resonance in Thin Films with Patterned Walls: Theory and Experiments. An oral talk in AIChE Annual meeting on 16th November 2020.
B. Dinesh and R. Narayanan, Pattern Formation in Electrostatic Instability: Weakly Nonlinear Analysis. An oral talk in AIChE Annual meeting on 20th November 2020.
B. Dinesh and R. Narayanan, Electrostatic Interfacial Instability: Weakly Nonlinear Analysis. A talk in APS DFD on 22nd November 2020.
B. Dinesh and R. Narayanan, Weak nonlinear analysis of Rayleigh-Taylor instability in linear viscoelastic fluids. A talk in APS DFD on 24th November 2020.
B. Dinesh, Nevin Brosius, Farzam Zoueshtiagh and R. Narayanan, Two-phase Faraday resonance with patterned substrates- Theory and Experiments. AIChE Annual Meeting, Orlando, Nov 10-15, 2019.
B. Dinesh and R. Narayanan, Can we use reduced order models? The Burgers program 2019 summer research school on fluid dynamics, University of Maryland, college park, 3-7th June 2019.
B. Dinesh and S. Pushpavanam, Effect of soluble surfactant on the linear stability of layered two-phase flows through soft-gel-coated parallel walls. CompFlu, IC&SR, IIT, Madras. 18-20th December 2017.
B. Dinesh and S. Pushpavanam, Effect of soluble surfactant on the linear stability of layered two-phase flows through soft-gel-coated parallel walls. Journal of Fluid Mechanics Symposium, IC&SR, IIT, Madras. 14-15th December 2017.
B. Dinesh and S. Pushpavanam, Linear stability of layered two-phase flows through soft-gel-coated parallel walls. AIChE Annual Meeting, Minneapolis. Oct 29-Nov 3, 2017.
B. Dinesh and S. Pushpavanam, Biofluid dynamics of two-phase stratified flow through flexible membranes. American Physical Society 69th Annual DFD Meeting (APS Physics), Portland, Oregon. Nov 20-22, 2016.
B. Dinesh and S. Pushpavanam, Stability analysis of two-phase stratified flows in a confined channel. American Physical Society 68th Annual DFD Meeting (APS Physics), Boston, Massachusetts. Nov 22-24, 2015.
Teaching Experience
Currently teaching Mass Transfer Operations-II for B. Tech students at IIT BHU from December 2022-May 2023.
M. Tech Laboratory-II December 2022-May 2023.
Taught the course Chemical Technology for B. Tech students at IIT BHU from July-November 2022
M. Tech Laboratory-I July-November 2022
Delivered lectures in a Gian course on "Interfacial Instabilities" conducted by Department of Mathematics at IIT Ropar.
Chemical Engineering Practices at IIT BHU 2022.
Teaching assistant for Mathematical methods in chemical engineering at IIT Madras, 2017, 2018. The course introduced analytical methods of solving linear algebraic, ordinary differential and partial differential equations. I have delivered a few lectures in the course. The faculty-in-charge was Prof. S. Pushpavanam.
Teaching assistant for Multiphase flows at IIT Madras, 2015, 2016. The course focused on hydrodynamic instabilities. I have delivered a few lectures in the course. The faculty-in-charge was Prof. S. Pushpavanam.
Awards
Ramanujan Fellowship awarded in the year 2022 by Science and Engineering Research Board, Department of Science and Technology Government of India.
Institute Research Award for the best Ph.D. research scholar in the epartment of Chemical Engineering at Indian Institute of Technology Madras (IITM) for the year 2019.
Services
Chaired a session on "Surface Tension Effects Interfacial Phenomena-II" at APS DFD held at Phoenix, Arizona on 21-23 of November 2021.
Reviewer for Physical Review Fluids (PRF), Journal of Heat Transfer (JHT), Physics of Fluids (POF) and Physical Review E (PRE).