Engineer Design

Gautham Varma Raja

Kochanattu

Dedicated and driven engineer who enjoys the challenge, seek-

ing a position as a design engineer specialized in fluid dynamics and heat and mass transfer. Experience

08/03/2017 -

07/09/2017

Research Assistant, University Of Stuttgart, Stuttgart, Germany. Worked as a research assistant in the department of Institut für Thermodynamik der Luft- und Raumfahrt (ITLR) integrating with the DROPIT project. During the course of the research, I was acquainted with the in-house code for Droplet dynamics calculations for oscillations and evaporation called Free Surface 3D (FS3D) and was able to get acquainted with High performance computing (HPC). The internship helped me in preparing for my current PhD position.

14/02/2016-

29/02/2016

Engineer Consultant, HPE-8, Gdnask, Poland.

Worked as a fluid analysis consultant in the design team who was designing an overflow tank from a turbine outlet. I was working with OpenFOAM software and analyzed the flow of excess hydrogen and oil in the overflow tank. This project helped me understand the team environment and was also helpful in understanding better the OpenFOAM software as well as physics behind the fluid diffusion. 01/11/2012 -

01/06/2014

Academic Tutor, United States of America.

Assisted undergraduate students in the understanding of abstract concepts in Physics and Mathematics. Catered to each individual separately and guided them towards the appropriate problem-solving skills. Organized student study groups when necessary to improve their knowledge of the subjects through various group activities. 07/06/2010 -

28/06/2010

In- Plant Trainee, Bharat Petroleum corporation Limited. Worked as a part of an Expert team at Bharat Petroleum Corporation limited who was trying to implement Reliability Centered Maintenance for a Critical unit of Fluidized Catalytic Converter Unit at the plant. We analyzed the history of the critical pump failures and used Meridian Software to computerize the maintenance strategy of the pump which will help in increasing the life expectancy of the pump. This helped in decreasing the cost of maintenance of the pump and the plant in the long run.

Education

01/10/2017-

Present

Doctor of Philosophy, University of Bergamo, Bergamo, Italy. Currently pursuing my Ph.D. in Engineering and Applied Sciences Department of the University of Bergamo. The work is concentrated on understanding the effect of evaporation on oscillating amplitude and frequency of the droplet. The work is part of the inter-university project called the DROPIT with the University of Stuttgart. The main objective of the researc was to obtain a mathematical model which would help us understand the effect of evaporation on oscillating frequency and amplitude. The research is helpful in further understand the droplet dynamics in Spary technology, IC engines, Jet engines etc. The work was successful and was able to obtain results which was published during the course of the doctoral studies. The completed thesis will be submitted by end of September 2020. 01/09/2014-

30/09/2016

Master Of Science in Applied Mathematics, Mathmods Erasmus Mundus Program, L’Aquila- Hamburg- Gdansk, European Union.

Master Thesis - Direct Numerical simulation of fluid structure interactions on thin structures The research thesis was conducted in Politecnico Di Milano where I implement a partitioned approach of an Immersed boundary method on an existing direction splitting fluid dynamics Navier-Stokes Equation. In order to implement the code, I used a technique called the Moving-Least Squared(MLS) technique which utilizes the equillibrium in momentum to produce a boundary condition near the surface boundary. Skills Acquired

+ Courses - Finite Element Analysis - Galerkin Methods, Numerical Approximation for Finite Difference and Finite Volume, Dynamical Systems, Partial Differential Equations, Continuum Mechanics

+ Programs and Languages - OpenFOAM, MATLAB, Fortran, C++ Æ +393********* • Q *******.*******************@*****.**

https://www.linkedin.com/in/gauthamvarmarajak 1/2 01/09/2012-

31/05/2014

Master of Science In Engineering, Purdue University, Lafayette, United States of America. Skills Acquired

+ Courses - Compressible Flow, Hypersonic and Aerothermodynamics, Thermodynamics, Fluid Flows, Computational Fluid Dynamics, Turbulence,Combustion, Turbulent Combustion Modeling, Boundary Value Problems, Turbulent Combustion Modeling

+ Programs and Languages - MATLAB, Fortran (Basics), Python(Basics),Unix interface, High speed computing 01/09/2008-

01/06/2012

Bachelor Of Technology, Mar Athanasius college of Engineering, Mahatma Gandhi University, Kothaman- galam, India.

The main concentration during the subject is Mechanical Engineering. Skills Acquired

+ COurses - Fluid Dynamics, Hydraulic Machines, Strength of Materials, Mechanics of Materials, Basics in Aerospace Engineering

+ Programs and Languages - C, C++

Some Relevant Projects

May 2015 Mathematical Modelling of Vitreoschisis.

Vitreoschisis is a disorder of the eye which is the consequence of an anomalous detachment of the vitreous from the retina in the posterior part of the eye leading to a collapsing of the vitreous. The point where the vitreous and the retina re-join into one layer is often the site of significant traction on the retina that might produce retinal tearing. A preliminary simplistic model was used to determine the conditions of maximum stress on the retina depending on the thickness of the layer between the retina and the detached vitreous. The results were used to build a second model which, despite still being simplistic, was sufficient to determine the motion of the vitreous and the traction forces applied to the retina under certain assumptions. Some possible further developments to improve the model were also implemented.

April 2013 Analyzed the Multi-phase Flow over a High-Speed Train. Analyzed the turbulent flow over a high-speed train during snowfall using different Turbulence models like K-w and K- epsilon method. The analysis was carried out in ANSYS Fluent commercial Software. The analysis provided the difference between the two models for the multi-phase flow analysis. It helped to understand how to read the various analysis produced from Fluent and what needs to be done to get better results. It was seen that the K epsilon derived better results and the movement of the snow particles was better captured in this method. April 2013 Generated code for the Fluent analysis of flow over a bump by the Finite Difference Method and Finite Volume Method using Flux Splitting.

Generated a grid in MATLAB using the Finite difference and Finite Volume method to analyze a flow over a half airfoil. The flow was given speed Mach 2 and the shock was captured. The streamlines were also plotted in this line using Tecplot 360. It was seen that the use of the Finite Volume method gave better results and the Shock was captured with higher precision. Here residuals graph was plotted, and it was seen that the residual values obtained were comparable to the one obtained by using Ansys Fluent. Latex was used in order to define the results. Publications

+ S. Tonini, G. Varma Raja Kochanattu, G.E. Cossali; The effect of evaporation on the oscillation frequency of an inviscid liquid drop, International Communications on Heat and Mass Transfer, August 2019. https://doi.org/10.1016/j.icheatmasstransfer.2020.104609

+ J. Reutzsch, G. Varma Raja Kochanattu, M. Ibach, C. Kieffer-Roth, S. Tonini, G. E. Cossali, B. Weigand; Direct Numerical Simulations of Oscillating Liquid Droplets: a Method to Extract Shape Characteristics, ILASS–Europe 2019, 29th Conference on Liquid Atomization and Spray Systems, 2-4 September 2019, Paris, France. https://ilass19.sciencesconf.org/244795/document

+ G. Varma Raja Kochanattu, G.E. Cossali, S. Tonini; Modelling of heat and mass transfer from spheroidal drops with general non-uniform Dirichlet boundary conditions, Proceedings of the DIPSI Workshop 2018. Droplet Impact Phenomena & Spray Investigations, 18th May 2018, Bergamo, Italy . https://aisberg.unibg.it/retrieve/handle/10446/128549/272067/DIPSI2018_pp56-59.pdf

+ G. Varma Raja Kochanattu, G. E. Cossali, and S. Tonini; An Analytical Approach to Model the Effect of Evaporation on Oscillation Amplitude of Liquid Drops in Gaseous Environment; Droplet Interactions and Spray Processes. Springer, Cham, 2020. 3-16. http://dx.doi.org/10.1007/978-3-030-33338-6_1 Scholarships Awarded

+ Scholarship for research activity to young graduates entitled "Numerical and analytical modeling of the effect of interface motion on the evaporation of a single-component liquid drop, as part of the" Droplet Interaction Technologies "(DROPIT) project in collaboration with the University of Stuttgart "(01/03/2018

- 30/06/2018)

+ 12-month early stage check for research activities (sc 09 / c2 - technical physics and nuclear engineering - ssd ing-ind / 10 - industrial technical physics) entitled - "Modeling the effect of evaporation on oscillations of a liquid drop "(07/01/2018 - 06/30/2019)

Æ +393********* • Q *******.*******************@*****.**

https://www.linkedin.com/in/gauthamvarmarajak 2/2

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