Aasheesh Bajpai

Prime Minister Research Fellow

Department of Aerospace Engineering

Indian Institute of Technology Kanpur

Curriculum Vitae

Hello, welcome to my webpage. I am currently working as a prime minister research fellow at the Department of Aerospace Engineering at Indian Institute of Technology Kanpur, Kanpur (U.P.), India.

Before moving to Kanpur, I worked as a research assistant at IIT Kharagpur, West Bengal, India. My appointment as PMRF was possible through research opportunity I got during my time at the lab, I worked on enhancing exergetic efficiency of hydrogen liquefaction plant, because turboexpander is heart of any liquefaction plant we worked towards enhance the efficiency of turboexpanders and it enhanced the overall efficiency of process.

I am pursuing my doctoral studies under the guidance of Professor Rakesh Kumar Mathpal, in the non-equillibrium flow simulation laboratory(NFSL), IIT Kanpur. My research is on developing a coupled DSMC-DEM (Direct Simulation Monte Carlo -Discrete Element Method) framework for dusty gas flow simulation and analysing the basic physics understanding behind lunar landing. In any space exploration mission during planetary descent, when a lander approaches towards the surface of an extraterrestrial body, the expanded supersonic plume from the nozzle exhaust of positioning rockets impinges on the planetary body's soil or regolith, and interaction between plume and surface occurs. This high-speed and high-temperature plume produces a shock, fluidizes, and ejects granular particles from a surface. This creates one or more craters, and as a result, soil particles gain momentum. Consequently, this ejected matter would disperse dust and larger debris. The particles that are so dispersed have the potential to do severe damage. The present work aims to develop a high-fidelity simulation framework capable of modeling dusty gas flows encountered during plume surface interactions. The research work aims at performing dusty gas flow dynamics using a particle-based Lagrangian-Lagrangian computational framework. The solver that is developed for dusty gas flows is by coupling the in-house DSMC flow solver with the in-house DEM solver.

Previously, I was a Masters student in the Process Equipment & Design Laboratory (PED lab) at the Indian Institute of Technology Kharagpur. My research focus was on developing Reverse Brayton Cryocooler (RBC) for high temperature superconducting (HTS) cables. I worked under the guidance of Professor Parthasarathi Ghosh towards my thesis on "Development of test rig towards experimental investigation of Reverse Brayton Cryocooler used for cooling of High Temperature Superconductors". During this time I worked on converting an old decommisioned helium liquifier into a Reverse Brayton cryocooler. In this work we utilised heat exchangers and turboexpanders of helium liquifier to build a RBC for HTS cooling. In this work my contribution was to estimate the parameters of all heat exchangers and building a test rig for cryogenic turboexpander. Prior to joining post graduate studies I finished my bachelors studies in Mechanical Engineering from AKG Engineering College (AKTU, Lucknow), Ghaziabad, Uttar Pradesh .


Research Interests

  • Gas-Granular flows
  • Discrete Element Method
  • Direct Simulation Monte Carlo
  • Molecular Gas Dynamics
  • Granular flows
  • Computational Fluid Dynamics
  • Shock Waves
  • High-Speed Gas Dynamics

Education

Jan 2020 - Present Ph.D. in Aerospace Engineering (CPI:10/10).
Indian Institute of Technolgoy Kanpur, UP, India.
July 2017 - May 2019 M.Tech. in Cryogenic Engineering.
Indian Institute of Technolgoy Kharagpur, WB, India.
July 2012 - June 2016 B.Tech. in Mechanical Engineering.
A.K.G. Engineering College, Ghaziabad, UP, India.

Teaching Experience (as a student)

Fall 2018 Teaching Assistant CR61011: Compressors and Pumps
Spring 2019 Teaching Assistant CR61022: Cryogenic Expansion Devices (Turbomachinary)
Spring 2021 Teaching Assistant ESO201A: Thermodynamics
Fall 2021 Teaching Assistant AE451(A): Aerodynamics Experiments
Fall 2021 Teacher Introduction to Thermodynamics
Spring 2022 Live tutor NPTEL: Introduction to Programming in C
Prof Satyadev Nandakumar
Certification from NPTEL, IIT Kanpur
Fall 2022 Live tutor NPTEL: Computational Fluid Dynamics and Heat Transfer
Prof Gautam Biswas
Certification from NPTEL, IIT Madras

Trainings

17 May-- 20 May 2022 HPC in CFD
High Performance Computing (HPC) for Computational Fluid Dynamics (CFD) Applications, organised by IIT Bombay and C-DAC under the aegis of National Supercomputing Mission (NSM)
Certificate
July 2015 -- August 2015 National Thermal Power Corporation, Dadri
Vocational Training for plant working understanding
Boiler maintenance and Ash handling department, learnt about power plant process, Rankine cycle and various equipment used etc. Also submitted a project report on working of cooling towers
Certificate
June 2014 -- July 2014 Indian Railways
In workshop training Indian Railways workshop, Izzatnagar, Bareilly
Braking system in locomotive (Air brakes, pneumatic brakes), working of engine of locomotive, carriage maintenance.
Certificate

Course Projects (as a student at IIT)

AE694 (Spring 2020) Acoustics in fluids
Natural frequencies and their mode shapes for different geometries
Report
AE602(A) (Spring 2020) Heat Transfer for Aerospace Application
A Study of Mixed Convection Heat Transfer in Different Structures
Term Paper

Refereed Journal Publications

[1] Aasheesh Bajpai, Ashish Bhateja and Rakesh Kumar "Plume Surface Interaction during Lunar Landing" 2022 (Manuscript under prepration) 
[2] Ahilan Appar, Aasheesh Bajpai, Uday Shivkumar, Rakesh Kumar and Srujan Naspoori. "Rarefied Gas Effects on Hypersonic Flow over a Transpiration-Cooled Flat Plate" Physics of fluids, 2022 (Submitted) 
[3] Aasheesh Bajpai, Rohan Dutta and Parthasarathi Ghosh. "Parameter Estimation of Equipment for Development of an Experimental Setup of a Reverse Brayton Cryocooler for Cooling High Temperature Superconducting Cables" Indian Journal of Cryogenics, 2019 

Refereed Conference Publications

[1] Aasheesh Bajpai, Aman Dhillon, Rohan Dutta and Parthasarathi Ghosh. "Root cause analysis of early performance deterioration of an existing helium liquefier using process simulation" 15th Cryogenics, IIR international conference proceedings, 2019,PAPER ID: 0047 DOI: 10.18462/iir.cryo.2019.0047  PDF
[2] Aman Dhillon, Aasheesh Bajpai and Parthasarathi Ghosh. "The effect of HTS heat rejection conditions on performance of reverse Brayton cryocooler" 15th Cryogenics, IIR international conference proceedings, 2019. PAPER ID: 0042 DOI: 10.18462/iir.cryo.2019.0042, 2019  PDF

Conference Presentations

[*] Aasheesh Bajpai, Ashish Bhateja and Rakesh Kumar. "Computational Modeling of Dusty Gas Flows in DSMC-DEM Framework" Bulletin of the American Physical Society  
[1] Aasheesh Bajpai, Mahima Bhavsar, Deepnil Dutta , Ashish Bhateja and Rakesh Kumar. "Lagrangian-Lagrangian Simulation of Dusty Gas Flow Past a Cylinder" Presented at Traffic & Granular Flow (TGF)- 2022 at IIT Delhi, Delhi, India on 15th to 17th October, 2022   Certificate
[2] Mahima Bhavsar, Aasheesh Bajpai, Aqib Khan and Rakesh Kumar. "Granular Flow Past an Elliptical Obstacle" Presented at Traffic & Granular Flow (TGF)- 2022 at IIT Delhi, Delhi, India on 15th to 17th October, 2022   Certificate
[3] Aasheesh Bajpai, Ahilan Appar, Srujan Naspoori and Rakesh Kumar. "Numerical Investigation of Pyrolysis Gas Interaction with Hypersonic Reentry Flow-field " Presented at 32nd International Symposium on Rarefied Gas Dynamics (RGD32) - 2022 at Seoul, South Korea on 4th to 8th July, 2022  
[4] Rakesh Kumar, Arun Chinappan, Aasheesh Bajpai, Mahima Bhavsar and Ashish Bhateja. "Modeling of Lunar Dust Dispersion Using Two-way Coupled Lagrangian-Lagrangian Framework" Presented at 32nd International Symposium on Rarefied Gas Dynamics (RGD32) - 2022 at Seoul, South Korea on 4th to 8th July, 2022  
[5] Ahilan Appar, Aasheesh Bajpai, Uday Shivkumar, Rakesh Kumar and Srujan Naspoori. "Validity of the Blowing Correction Correlation in Rarefied Flow Regimes" Presented at 32nd International Symposium on Rarefied Gas Dynamics (RGD32) - 2022 at Seoul, South Korea on 4th to 8th July, 2022  
[6] Aasheesh Bajpai, Rohan Dutta and Parthasarathi Ghosh. Parameter Estimation of Equipment for Development of an Experimental Setup of a Reverse Brayton Cryocooler for Cooling High Temperature Superconducting Cables Presented at National Symposium in Cryogenics and Superconductivity-27 at IIT Bombay, Mumbai, India on 16th to 18th January, 2019,,  
Certificate
[7] Aasheesh Bajpai, Aman Dhillon, Rohan Dutta and Parthasarathi Ghosh. Root cause analysis of early performance deterioration of an existing helium liquefier using process simulation Presented at IIR international conference, April 7-11, 2019, Prague, Czech Republic, Europe., 2019 
Certificate

Poster Presentations

[1] Aasheesh Bajpai, Ahilan Appar, Srujan Naspoori and Rakesh Kumar. Numerical Investigation of Pyrolysis Gas Interaction with Hypersonic Reentry Flow-field Presented poster at 32nd International Symposium on Rarefied Gas Dynamics (RGD32) - 2022 at Seoul, South Korea on 4th to 8th July, 2022   Poster
[2] Aman Dhillon, Aasheesh Bajpai and Parthasarathi Ghosh. The effect of HTS heat rejection conditions on performance of reverse Brayton cryocooler Presented poster at IIR international conference, April 7-11, 2019, Prague, Czech Republic, Europe., 2019  Poster

Seminars and Invited Talks

  1. Introduction to Thermodynamics, lectured in the Department of Mechanical Engineering, HBTU, Knapur, India, July-Dec , 2021.


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Courses taught at HBTU Kanpur as PMRF

  1. ME6150, Laws of Thermodynamics: July - Dec 2021

National Programme on Technology Enhanced Learning (NPTEL) as a PMRF Tutor

  1. Introduction To Programming In C : February - April 2022
  2. Computational Fluid Dynamics and Heat Transfer : July - October 2022

Internship Students

  1. Kriti Mawani (Summer 2021)
  2. Kuhu Mishra (Winter 2019)
  3. Niga Das (Winter 2019)

According to Apollo Astronaut John Young: "Dust is the number one concern in returning to the moon"

Lunar landing diagram by Aasheesh Bajpai

Trulli
Physics of plume surface interaction(PSI): PSI involves high-speed chemically reacting plumes interacting with a planetary surface. Near plume region behaves as a continuum. Under rarefied conditions, the continuum assumption is not valid farther away from plume; therefore, kinetic-based equations of motion are more applicable. For this work we are using only particle based methods in the whole domain. We are using DSMC for the plume flow and DEM for the granular particle flows and particle-particle interactions.
Problems reported during Apollo landing: Obstruction to the pilot's vision, degradation of thermal control surfaces, dust penetration into the vehicle, damage to solar cells and pressurized vessels, damaged astronaut's suit, surveyor's optical mirror(183 meteres from Apollo) was damaged due to the dust particles cast out by Apollo during descent.
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Fig. - Martian landing
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Fig.2 - Direct Simulation Monte Carlo Flowchart
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Fig.3 - Discrete Element Method Flowchart
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Linux/Programming Documents

Computaional Fluid Dynamics

Introduction to programming with C

Engineering Talks

Links

TED Talks

Professors working on granular flows

Professors working on gas-granular flows or dusty gas flows

Professors working on CFD

Professors working on hypersonics

Contact: Aasheesh Bajpai
Room no. B-233, Hall-11,
Department of Aerospace Engineering
Indian Institute of Technology Kanpur
Kanpur, UP, India
208016
Phone: +91-8348323133
E-mail: aasheesh@iitk.ac.in
Profile: Google Homepage Profile
Linkedin profile: Linkedin Profile
Facebook profile: Facebook Profile
Instagram profile: Instagram Profile

Extracurricular activities