Assistant Professor
Ramkarn Patne
A-507
···
PhD: Ph.D, IIT Kanpur
Research Interests: Hydrodynamic stability, Biofluid mechanics, Complex flows
“The growth of the perturbations in space and time leads to hydrodynamic instabilities which could lead to the ubiquitous turbulent flow. Thus, control of instabilities is essential in controlling turbulence.”
Research Overview
Understanding the dynamics of fluid flows is essential in myriad natural and industrial settings ranging from biofluid mechanics to additive manufacturing. The overarching theme of my research group is to analyse the dynamics of flows and apply it to manipulate the hydrodynamic instabilities to achieve the industrial application goal or understand the natural phenomena.
Research Highlights
Pulmonary fluid dynamics
We analyse the instabilities involved in the mucus flow vital in leading to the airway closure scenarios. The strategies to mitigate these instabilities is also being explored.
Buoyancy instabilities
A liquid layer heated from below is known to become unstable as heating temperature is increased beyond a certain value due to buoyancy instability. We analyse the modification of this instability by subjecting the liquid layer to an oblique temperature gradient.
Flow past deformable surfaces
These flows are encountered in biological and microfluidic settings. We analyse the impact of the deformable surface on flow dynamics and use it to manipulate the mixing.
Complex flows
Biological and industrial fluids often have a complex relationships between the applied stress and resulting velocity field gradient defined by a constitutive relation. We analyse the impact of non-Newtonian character on hydrodynamic instabilities.
Associated Projects
Ongoing
Role of instabilities in the formation of fluid particles
Start Year: 2023
Sponsor: SERB DST
Ongoing
Dynamics of complex flows subjected to a temperature gradient
Start Year: 2022
Sponsor: IITH
Selected Publications
Elastohydrodynamic instabilities in pressure-driven flow through a poroelastic channel
Ramkarn Patne
Shear-thickening elastic instability in inertialess pipe flow of White–Metzner fluid
Ramkarn Patne
Solute dispersion in Phan-Thien–Tanner fluid flows
Kartick Mahata; Jyotirmoy Rana; Ramkarn Patne
Absolute instability in the higher-generation airways: a pathway for airway closure
Ramkarn Patne
Yield stress destabilizes viscoelastic fluid flow
Ramkarn Patne
Shear-enhanced dispersion in Kolmogorov flow
Kartick Mahata; Dipika Robi Das; Ramkarn Patne; Jyotirmoy Rana
Effect of inhaled air temperature on mucus dynamics in the proximal airways
Ramkarn Patne
Unsteady solute dispersion in large arteries under periodic body acceleration
Santanu Das; Kartick Mahata; Ramkarn Patne; Sanjeev Kumar; Jyotirmoy Rana
Linear dynamics of a thick liquid layer subjected to an oblique temperature gradient
Ganesh Dixit; Syed Furqan Bukhari; Ramkarn Patne
A novel instability in an elastoviscoplastic fluid flow
Ramkarn Patne