Qualification: 
Ph.D, M.Tech, B-Tech
jeetusbabu@am.amrita.edu

Dr. Jeetu S. Babu currently serves as Assistant Professor (Sl. Gr.) at the Department of Mechanical Engineering, School of Engineering, Amrita Vishwa Vidyapeetham, Amritapuri. He received his Ph. D. in Computational Nanotechnology from NIT Calicut. Later, he worked as a Post Doctoral Fellow at TIFR Centre for Interdisciplinary Sciences, Hyderabad and IIT Kharagpur.

Currently, Dr. Jeetu's major research focus is on

  • Computational investigations on slip in nanoscale channels (Funded by DST, Government of India under the Early Career Research Award scheme.)
  • Developing deep learning strategies for investigating the physical behaviour of nanoscale systems.
  • Nanotechnology enhanced water filtration using coastal sand (Experimental work)

Publications

Publication Type: Conference Proceedings

Year of Publication Title

2019

J. V. M. S. M Pani, P. Vipin, K. R. R. Praveen, A. Saritha, Geena Prasad, and Jeetu S. Babu, “The effect of nano composite on phosphate adsorption in rich black soil”, IOP Conference Series: Materials Science and Engineering, 3 rd International Conference on Advances in Materials and Manufacturing Applications (IConAMMA 2018), Amrita School of Engineering, Bangalore, India, vol. 577. IOP Publishing, p. 012060, 2019.[Abstract]


Industrial waste disposal is one of the major causes for the contamination of water bodies and soil. This leads to increase in the amount of elements like phosphorous in the water bodies. As a possible solution to this problem, we investigate the effect of introducing a nano sized coating of graphene on coastal sand in the adsorption of phosphate. In the present study we employ batch adsorption techniques to perform Phosphate adsorption (p-Adsorption) on rich black coastal sand and nano composite. This will help us in understanding the physical properties of clay soils, the effect of nanoscale coating on the adsorption of phosphate in soil and its dependence on contact time, concentration and ph values.

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2019

Aswin Subash and Jeetu S. Babu, “A computational investigation of the fluid-solid interfacial phenomenon at nanoscale”, International Conference on Applied Mechanics and Optimisation, AIP Conference Proceedings, vol. 2134. Mar Baselious College of Engineering and Technology, Kerala, India, p. 040002, 2019.[Abstract]


Interfacial interaction between fluid and solid is one of the major factors that affects the fluid transport through a given channel. Hydrodynamic slip length is one of the important parameter to quantify the interfacial interaction. Using molecular dynamic simulation of Poiseuille type flow of Argon fluid through Platinum channel, we have demonstrated a particle method to tune hydrodynamic slip length of nano channels. The effect of varying the interaction potential parameter and roughness ratio on the slip length is reported.

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2018

Manu Nair and Jeetu S. Babu, “Methods to improve electro kinetic energy conversion efficiency in nanoscale channel”, 6th International Conference on Contemporary engineering and technology,Chennai, India. 2018.[Abstract]


With the help of MD simulation in a Lennard jones system, Argon fluid flowing through a Platinum channel, we have demonstrated a practical approach to tune slip length in nanoscale flows. It was found that the presence of solid obstacles in the channel can manipulate the slip length similar to the variation of slip length with respect to fluid solid interaction potential. These results can act as a guidance to improve the electro kinetic energy conversion efficiency in nanoscale flows which will have immense application in the development of nanofluidic battery.

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2018

M. Daniel and Jeetu S. Babu, “Equilibrium Molecular Dynamics Investigation of Fluid Slip in Nanoscale Channels”, 6th International Conference on Contemporary engineering and technology, Chennai, India. 2018.[Abstract]


Interfacial hydrodynamic slip is an importantfactor while considering fluid flow through nanochannels. Various studies have been done both in NEMD and EMD to study the fluid slippage over solid surface. Molecular Dynamics Study of Fluid Solid Interfacial Slip and its Effect on Aerodynamic Drag[1] is one such example where dependence of slip and the drag properties are studied. In this paper we try to examine different types of surface roughness affects the fluid slip with MD simulation of poiseuille flow.

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2018

Asef Mohammed and Jeetu S. Babu, “Molecular Dynamics Study of Fluid Solid Interfacial Slip and its Effect on Heat Transfer”, 5th International Conference on Computational Methods for thermal problems (ThermaComp2018), Indian Institute of Science, Bangalore, India. 2018.

2017

A. Mohammed and Jeetu S. Babu, “Molecular Dynamics Study of Fluid Solid Interfacial Slip and Its Effect on Aerodynamic Drag”, MATEC Web of Conferences 2017 International Conference on Mechanical, Material and Aerospace Engineering, 2MAE 2017; Beijing; China, vol. 114. EDP Sciences, 2017.[Abstract]


Interfacial hydrodynamic slippage is controlled by two factors say physical structure and chemical composition. Various studies have been conducted experimentally which try to connect the physical structure of the surface and its chemical property on the interfacial wettability. One such example is the Tunable wettability in surface-modified ZnO-based hierarchical nanostructures [2]. In which vertically aligned Nanoneedles and Nanonails were employed as a platform to determine the effect of surface structure. According to which a variation in static contact angles were observed as the cap size the nanonails constantly increased. Starting with a contact angle of 104° the contact angle first increases and then decreases, which means that the slip length first increases and then decreases. The increase in slip length reduces the drag, which has immense application in the aerodynamic field. This paper investigates the relation between the chemical wettability and aerodynamic drag by performing MD simulations of couette flow with varying fluid-surface interaction. © The Authors, published by EDP Sciences, 2017.

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2016

Navneeth M., Akhil Mohan, Akshay Chandran, Akash P. Kumar, Geena Prasad, Saritha A., and Jeetu S. Babu, “Nanotechnology Enhanced Water Filtration Using Coastal Sand”, 44th National Conference on Fluid Mechanics and Fluid Power, Amrita Vishwa Vidyapeetham, Amritapuri Campus, Kollam, Kerala, India. 2016.

2013

Jeetu S. Babu and Sarith P. Sathian, “Calculation of slip length in nanofluidics using theory of reaction rates and modification to bi-viscosity model”, 25th International Conference on Statistical Physics of the International Union for Pure and Applied Physics, Seoul, Korea. 2013.

2013

S. Krishnan T. V., Jeetu S. Babu, and Sarith P. Sathian, “Effect of confined fluid interaction on the thermal transport in carbon nanotubes”, 22 nd National and 11 th International ISHMT-ASME Heat and Mass Transfer Conference, IIT Kharagpur, India. 2013.

2012

Jeetu S. Babu and Sarith P. Sathian, “Hydrodynamic analysis of ion movement over graphene using transition state theory”, International Conference on Nanoscience and Technology, Hyderabad, India. 2012.

2011

Jeetu S. Babu and Sarith P. Sathian, “Effect of chirality on the flow rate and viscosity of water confined in carbon nanotubes”, Third International Conference on Frontiers in Nanoscience and Technology (Cochin-Nano), Cochin, India. 2011.

Publication Type: Journal Article

Year of Publication Title

2016

Jeetu S. Babu, Chandana Mondal, Surajit Sengupta, and Smarajit Karmakar, “Excess vibrational density of states and the brittle to ductile transition in crystalline and amorphous solids”, Soft Matter, vol. 12, no. 4, pp. 1210 - 1218, 2016.[Abstract]


The conditions which determine whether a material behaves in a brittle or ductile fashion on mechanical loading are still elusive and comprise a topic of active research among materials physicists and engineers. In this study, we present the results of in silico mechanical deformation experiments from two very different model solids in two and three dimensions. The first consists of particles interacting with isotropic potentials and the other has strongly direction dependent interactions. We show that in both cases, the excess vibrational density of states is one of the fundamental quantities which characterizes the ductility of the material. Our results can be checked using careful experiments on colloidal solids.

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2015

Jeetu S. Babu, Swathi Uday, Suneeth Sekhar, and Sarith P. Sathian, “Physicochemical analysis of slip flow phenomena in liquids under nanoscale confinement”, The European Physical Journal E, vol. 38, no. 109 , pp. 1-8, 2015.[Abstract]


Eyring theory employs the statistical mechanical theory of absolute reaction rates to analyse the transport mechanisms in fluids. A physicochemical methodology combining molecular dynamics (MD) and Eyring theory of reaction rates is proposed for investigating the liquid slip on a solid wall in the nanoscale domain. The method involves the determination of activation energy required for the flow process directly from the MD trajectory information and then calculate the important transport properties of the confined fluid from the activation energy. In order to demonstrate the universal applicability of the proposed methodology in nanofluidics, the slip flow behavior of argon, water and ionic liquid confined in various nanostructures has been investigated. The slip length is found to be size dependent in all the cases. The novelty of this method is that the variations in slip length are explained on the basis of molecular interactions and the subsequent changes in the activation energy. More »»

2013

S. Krishnan T. V., Jeetu S. Babu, and Sarith Sathian, “Effect of Confined Fluid Interaction on the Thermal Transport in Carbon Nanotubes”, International Journal of Micro-Nano Scale Transport, vol. 4, pp. 77-84, 2013.[Abstract]


Carbon nanotubes (CNTs) are one of the most commonly used engineering materials. The axial thermal conductivity of CNTs were found to be exceptionally high, which makes them one of the favourable candidates for the next generation thermal management devices. Previous works have indicated that the presence of confined fluid molecules inside the CNT lead to a reduction in the thermal conductivity of the CNT. In the present study, we investigate the effect of confined liquid flow through CNTs on the thermal transport of CNTs. Spectral energy density method is used to predict the phonon properties and lifetimes of the CNT. The phonon mode lifetimes were found to be greater under flow compared to filled condition for smaller diameter CNTs. But the flow does not seem to modify signifcantly the phonon mode lifetimes of larger diameter CNTs. These variations in the thermal transport properties of CNT is explained using the changes occuring in the physical behavior of the confined fluid as the tube diameter changes.

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2013

T. V. Sachin Krishnan, Jeetu S. Babu, and Sarith P. Sathian, “A molecular dynamics study on the effect of thermostat selection on the physical behavior of water molecules inside single walled carbon nanotubes”, Journal of Molecular Liquids, vol. 188, pp. 42 - 48, 2013.[Abstract]


The study of molecular properties is essential to understand the origin of thermodynamic stability of the confined liquid. Molecular dynamics (MD) simulations are carried out to study the pressure driven water flow through carbon nanotubes. Present study shows how the selection of thermostat affects the physical behavior of confined fluid in nanoscale channels and its consequences. We have used three different thermostats — Nosé Hoover, Langevin, and Berendsen, to study the influence of thermostat selection on the reorientation and power spectra of confined fluids. The determination of these properties will help us to investigate the intramolecular dynamics and the motion of the confined molecules. The results indicate that care should be employed while performing MD computations of confined fluids in carbon nanotubes, thermostating the confined fluid can lead to significant unphysical behavior of the fluid, which may lead to wrong interpretations.

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2012

Jeetu S. Babu and Sarith P. Sathian, “Combining molecular dynamics simulation and transition state theory to evaluate solid-liquid interfacial friction in carbon nanotube membranes.”, Phys Rev E Stat Nonlin Soft Matter Phys, vol. 85, no. 5 Pt 1, p. 051205, 2012.[Abstract]


A molecular dynamics (MD) methodology based on Eyring theory of reaction rates is proposed for investigating solid-liquid interfacial properties crucial to the development of many nanotechnology applications. The method involves the calculation of activation energy required for the flow process directly from the MD trajectory information. We have applied this methodology to study the behavior of water in hydrophobic confinement in carbon nanotubes (CNTs) and also between graphene sheets. In the case of confined water molecules in CNTs and between graphene sheets the degree of confinement and curvature effects were found to have more influence on the solid-liquid interfacial friction, with almost negligible friction below a certain characteristic dimension in both the cases. This behavior of confined and unconfined water molecules is explained on the basis of molecular interactions and subsequent changes in the activation energy. Analysis based on this method also revealed that a finite amount of friction does exist at the channel entry and exit region. This could limit the flow of liquid molecules through the nanochannels and hence needs to be taken into account in the design of nanofluidic devices.

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2011

Jeetu S. Babu and Sarith P. Sathian, “The role of activation energy and reduced viscosity on the enhancement of water flow through carbon nanotubes”, Journal of Chemical Physics, vol. 134, p. 194509, 2011.[Abstract]


Molecular dynamics simulations are carried out to study the pressure driven fluid flow of water through single walled carbon nanotubes. A method for the calculation of viscosity of the confined fluid based on the Eyring theory of reaction rates is proposed. The method involves the calculation of the activation energy directly from the molecular dynamics trajectory information. Computations are performed using this method to study the effect of surface curvature on the confined fluid viscosity. The results indicate that the viscosity varies nonlinearly with the carbon nanotube diameter. It is concluded that the reason behind the observed enhancement in the rate of fluid flow through carbon nanotubes could be the nonlinear variation of viscosity.

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