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Engineering Assistant

West Lafayette, IN
March 05, 2019

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Sri Harsha Challa 765-***-****


MASTER OF SCIENCE IN ENGINEERING, Purdue University, West Lafayette (Aug 2016 - Dec 2018)

Aeronautics and Astronautics Engineering, Major concentration: Computational Engineering GPA: 3.81

Coursework: Computational Aerodynamics, Fluid Mechanics, Numerical Analysis

BACHELOR OF TECHNOLOGY, Indian Institute of Technology Kharagpur, India (Jul 2012 - May 2016)

Aerospace Engineering GPA: 8.38

Coursework: High Speed Aerodynamics, Computational Fluid Dynamics, Finite Element Method


Programming: Python, C, C++, Fortran

Tools: MATLAB, Simulink, STAR-CCM+, ANSYS Workbench, Fluent, AutoCAD, SolidWorks, CATIA, PTC Creo


Graduate Research Assistant, Purdue University (Oct 2016 – Sep 2018)

“Modified Consistent Splitting Scheme for single-phase incompressible flows”

Developed a numerical scheme under guidance of Prof. Suchuan Dong for simulating single-phase outflows at high Reynolds numbers to enhance accuracy of results on severely-truncated domains

Validated algorithm by simulating flow around a circular cylinder for various Reynolds numbers and compared drag and lift coefficients to the experimental data

Investigated flow characteristics of double-shear outflow at high Reynolds numbers and generated flow visualization using the simulation data in Tecplot 360

“A Three-Dimensional Hybrid Spectral Method for two-phase flows”

Modified source code of two-phase incompressible flows to accurately capture the effects of static-contact angle and dramatically improved performance for three-dimensional simulations

Designed tests to validate the algorithm by comparing the simulation results of co-current two-phase flow in pipe with theoretically calculated values

Succeeded in capturing the equilibrium shape of water-drop for various contact angles with 99% accuracy

Explored the effect of static-contact angle on the motion of air-bubbles in a water container and successfully captured the dynamics of the flow in Tecplot 360

Undergraduate Researcher, Indian Institute of Technology Kharagpur (Jul 2015 - Apr 2016)

Performed simulations of 3-D subsonic and supersonic turbulent flows in a converging-diverging nozzle by means of Large Eddy Simulations using high-order compact schemes

Successfully captured the flow characteristics of turbulent flows accurately and investigated the effect of change in backpressure on the formation of normal shock wave in the C-D nozzle

Illustrated the variation of Favre averaged Reynolds stresses, mean density and velocity along the axial direction of the C-D nozzle and analyzed flow parameters near the shock wave

Engineering Intern, Airbus Engineering Center (May 2015 - Jul 2015)

Optimized NURBS curve parameters using Gauss-Newton method in Python and achieved global convergence using line search with regularization

Developed algorithm for reconstruction of NURBS curves and validated it by testing on NACA 0012 and NACA 4412 airfoils

Accelerated the design optimization process by developing an algorithm for CAD shape reconstruction from 3-D point cloud using K-means mesh segmentation and significantly reduced modeling time

Research Intern, Naval Science and Technological Laboratory (May 2014 - Jul 2014)

“CFD Analysis using STAR-CCM+”

Generated CAD model of a Cyclone separator and performed CFD analysis to measure flow characteristics

Analyzed velocity profiles of laminar and turbulent flows in an S-Bend pipe

Successfully captured the formation of shock wave for 2D transonic flow over RAE2822 airfoil and validated simulation results with experimental data


External Vehicle Aerodynamics (Nov 2018 - Dec 2018)

Constructed CAD model of Ahmed body and implemented mesh sizing techniques for grid generation

Investigated the effect of rear slant angle on the drag and lift coefficients of Ahmed body by performing CFD analysis using ANSYS Fluent and validated the results with experimental data

Design Optimization (Oct 2017 - Dec 2017)

Optimized speed reducer’s design cost function and compared the results and computational efficiency of using Sequential Quadratic Programming algorithm with that of using Genetic Algorithms

Implemented multi-objective design optimization using ε-constraint approach

Computational Aerodynamics (Feb 2017 - Apr 2017)

Generated boundary-fitted grid for converging-diverging (C-D) nozzle using two-boundary method

Developed algorithm to numerically simulate incompressible potential flow in C-D nozzle using MATLAB and validated the algorithm by comparing the results with theoretically calculated values

Boeing Student Project (Mar 2015 - Feb 2016)

Coordinated a team of 4 in designing, fabricating and testing a fixed-wing UAV with vertical takeoff and landing and cruise capability

Configured autopilot on APM 2.6 Flight controller to stabilize UAV during vertical takeoff and landing


Awarded Boeing Student Scholarship 2014 for best project proposal on designing VTOL UAV

Awarded Merit Scholarship throughout undergraduate studies for excellent academic performance

Awarded “Best Secretary” for outstanding leadership and management

Among top 1% of 500,000 applicants in IIT Joint Entrance Exam (IIT-JEE) 2012


Literary Secretary (Jul 2013 - May 2014)

Allocated resources and budget as undergraduate Literary Secretary, and motivated classmates to participate in literary events resulting in significant increase in participation and outreach

National Service Scheme (NSS) Team Leader (Jul 2013 - May 2014)

Supervised team of 20 NSS volunteers and delegated activities including educational and physical training, and organizing dramatics workshops for elementary school students


Challa, S.H., Dong, S., ”A Modified Consistent Splitting Scheme for Convective-Like Energy-Stable Open Boundary Conditions for Simulating Incompressible Outflows”. In 70th Annual Meeting of the APS Division of Fluid Dynamics at Denver, Colorado


Challa, S.H., Dong, S., Zhu, L.D. (Under Review), ”A Three-Dimensional Hybrid Spectral Element-Fourier Spectral Method for Wall-Bounded Two-Phase Flows”

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