Dr.-Ing. Harikrishnan Sreekumar

Computational Expert

Email: hk.sreekumar@icloud.com

Web: https://hksreekumar.github.io/profile/

About

Hi! I am Harikrishnan Sreekumar born on November 1993 in Kerala, India. Currently I work in Munich, Germany.

I am a computational expert specialized in the research of efficient numerical methods and solving strategies. Experienced with developing high performance numerical softwares in a sustainable manner, also designing from scratch, to handle solving algorithms for sophisticated problems by deploying high-end parallel programming methodologies and model order reduction techniques so as to reduce large-scale dimension of computational models. In addition, I am greatly fascinated by codes that are pushing the actual scientific limits.

My interests:
Numerical methods Algorithms C++ Data-driven methods Dimensionality reduction High performance computing
Computational code development Quantum computing Digital twins

Get in touch!

Experience

Dassault Systèmes | Munich, Germany

SIMULIA R&D Motion Software Engineering Manager

November 2024 - present

  • Research and development of motion simulation and multi-body dynamics

Technische Universität Braunschweig | Institute for Acoustics and Dynamics, Germany

Research associate

February 2019 - October 2024

  • Since August 2023 - Research coordinator for the InAD Research Field “Physics-based Modelling and Simulations”
  • Doctoral research on parametric surrogate modeling of high-dimensional vibroacoustic problems using projection-based model order reduction
  • Enabled efficient computation of expensive multi-physic aircraft simulations for various fuselage designs using faster (heavy) data management, optimized solvers and parametric reduced order models
  • Lead developer and contact person for the in-house high-performance computing C++ software project
  • Managed C++ and python software projects (with approx. 300000 lines of code and 8 active developers)
  • Raised the quality of the computational codes as a project member of SURESOFT: Sustainable Research Software Development and Deployment
  • Other key activities: advised 7 master thesis projects, assisted master courses, lectured 3 seminar talks, presented work in 7 international conferences, published 12 research papers, 2 software publications and conducted 4~dynamic workshops related to scientific software development (252 participants)

BMW Group, Munich | Research, New Technologies, Innovations

Master Thesis Intern

June 2018 - December 2018

  • Thesis work on Krylov subspace model order reduction in vibroacoustics

BMW Group, Munich | Research, New Technologies, Innovations

Research Intern

November 2017 - June 2018

  • Developed a C++ tool for model order reduction and application to automotive problems like the BMW i7 rear axle model for vibroacoustic analysis
  • Implemented advanced algorithms using math routines with Intel Math Kernel Library (MKL) and visualization of simulated data with Qt and Visualization Toolkit (VTK)
  • Built finite element routine for steady-state dynamic systems with fluid-structure interaction, various boundary conditions and distributed load coupling

Technische Universität Braunschweig | Institute for Engineering Design

Student research assistant

June 2016 - October 2017

  • Acoustic simulation of various geometries for static, frequency and time domain analysis
  • Maintained a high-performance computing C++ FEM code for better performance and maintenance of software dependencies (MPI, PETSc, SLEPc, ARPACK, HDF5)
  • Development of an uncertainty quantification module in python

Education

Doctor of Engineering (Dr.-Ing.) in Mechanical Engineering / Computational Sciences

Technische Universität Braunschweig

February 2019 - October 2024

  • Dissertation titled “Surrogate modeling of high-dimensional vibroacoustic problems using parametric model order reduction”
  • Dimensionality reduction techniques
  • Techniques for efficient solving of large-scale mechanical systems

Master of Science (M. Sc.) in Computational Sciences in Engineering

Technische Universität Braunschweig

October 2015 - December 2018

  • Master thesis: Krylov-based model order reduction in vibroacoustics
  • Student project: Transmission loss calculations of aircraft fuselage structures
  • Main subjects: Finite element method, Computational acoustics, Linear continuum mechanics, Contact mechanics, Advanced object oriented C++ techniques, Partial differential equations, Ordinary differential equations
  • Other subjects: Algorithms and programming, Isogeometric analysis, Computational aeroacoustics

Bachelor of Technology in Mechanical Engineering

University of Kerala, India

September 2011 - April 2015

  • Main subjects: Design of Machine Elements, Heat and Mass Transfer, Dynamics of Machinery, Theory of Machines, Refrigeration and Air Conditioning, Mechatronics, Gas Dynamics, Non Destructive Testing, Automobile Engineering, Thermal Engineering, Fluid Mechanics & Machines, Thermodynamics

Publications

For latest publications visit my profile on ResearchGate

Research papers

  • C. Blech, H. K. Sreekumar, Y. Hüpel, S. C. Langer: Efficient solution strategies for cabin noise assessment of a wave resolving aircraft fuselage model. ArXiV preprint. DOI: 10.48550/arXiv.2310.04734. 2023.
  • Y. Hüpel, C. Blech, H. K. Sreekumar, S. C. Langer: Efficient solutions of preconditioned large‐scale systems for simulative aircraft cabin noise assessment. In: Proceedings in Applied Mathematics and Mechanics. DOI: 10.1002/pamm.202300102. 2023.
  • H. K. Sreekumar, L. Outzen, U. Römer and S. C. Langer: Clustering-based parametric surrogate modeling of vibroacoustic problems assisted by neural networks and active subspace method, in: Adaptive modeling and simulation (ADMOS) 2023. DOI: 10.23967/admos.2023.009
  • H. K. Sreekumar, C. Blech, S. C. Langer: Sustainable development and deployment of an acoustic FEM research software. In: Proceedings of DAGA 2023, Hamburg, Germany. 2023.
  • H. K. Sreekumar, Y. Hüpel, and S. C. Langer: Active subspace realization for accelerated training of parametric reduced-order models in vibroacoustics. In Proceedings of the ICA 2022, Gyeongju, Korea, 2022.
  • C. Blech, N. Dreyer, B. Friebel, C. R. Jacob, M. Shamil Jassim, L. Jehl, R. Kapitza, M. Krafczyk, T. Kürner, S. C. Langer, J. Linxweiler, M.Mahhouk, S.Marcus, I.Messadi, S. Peters, J.-M. Pilawa, H. K. Sreekumar, R. Strötgen, K. Stump, A. Vogel, M. Wolter: SURESOFT: Towards Sustainable Research Software. In: campusSOURCE Award 2022. 2022. DOI: 10.24355/dbbs.084-202210121528-0
  • L. Hermann, H. K. Sreekumar, S. C. Langer, U. Römer: A statistical approach for the fusion of data and finite element analysis in vibroacoustics, In: Proceedings of DAGA 2022, Pages 895-898, Stuttgart. 2022.
  • U. Römer, M. Bollhöfer, H. K. Sreekumar, C. Blech, and S. C. Langer: An adaptive sparse grid rational arnoldi method for uncertainty quantification of dynamical systems in the frequency domain. International Journal for Numerical Methods in Engineering, DOI: 10.1002/nme.6761, 2021.
  • C. Blech, H. K. Sreekumar, U. Römer, M. Bollhöfer, S. C. Langer: Ein adaptives hybrides Verfahren zur Modellordnungsreduktion von dynamischen Systemen im Frequenzbereich. In: Proceedings of DAGA 2021, Vienna, Austria. 2021.
  • H. K. Sreekumar, R. Ullmann, S. Sicklinger, S. C. Langer: Efficient Krylov subspace techniques for model order reduction of automotive structures in vibroacoustic applications. In: Model Reduction of Complex Dynamical Systems. International Series of Numerical Mathematics, vol 171. Birkhäuser, Cham. DOI: 10.1007/978-3-030-72983-7_12. 2021.
  • H. K. Sreekumar, C. Blech, S. C. Langer: Large-scale vibroacoustic simulations using parallel direct solvers for high-performance clusters. In: Proceedings of DAGA 2021, Vienna, Austria. 2021.
  • Y. Hüpel, H. K. Sreekumar, S. C. Langer: Pole-Matching Technique for Parametric Model Order Reduction of Second Order Vibroacoustic Systems. In: Proceedings of DAGA 2021, Vienna, Austria. 2021.

Software publications

  • H. K. Sreekumar: elPaSo AcMoRe - Python module for faster training and evaluation of vibroacoustic systems with model order reduction. DOI: 10.24355/dbbs.084-202301301305-0. 2024.
  • H. K. Sreekumar, S. C. Langer: elPaSo Research - Elementary parallel solver research module for high performance vibroacoustic simulations. DOI: 10.24355/dbbs.084-202403151154-0. 2024.
  • H. K. Sreekumar, S. C. Langer: elPaSo Core - Elementary parallel solver core module for high performance vibroacoustic simulations. DOI: 10.24355/dbbs.084-202301301305-0. 2023.
  • H. K. Sreekumar, C. Blech, S. C. Langer: elPaSo AUTOMATE - Automated testing framework for validation and verification of a vibroacoustic simulation tool. DOI: 10.24355/dbbs.084-202301301258-0. 2023.

Dataset publications

  • H. K. Sreekumar: Dataset for the study of frequency-domain model order reduction techniques in vibroacoustic applications. DOI: 10.24355/dbbs.084-202403151158-0. 2024.
  • H. K. Sreekumar: Dataset for the study of various error measures steering adaptive model order reduction algorithms in vibroacoustic applications. DOI: 10.24355/dbbs.084-202403151201-0. 2024.
  • H. K. Sreekumar: Dataset for the study of parametric-domain model order reduction techniques in vibroacoustic applications. DOI: 10.24355/dbbs.084-202403151200-0. 2024.
  • H. K. Sreekumar, S. C. Langer: Benchmark dataset for verification and validation of elPaSo Core module. DOI: 10.5281/zenodo.7612532. [Zenodo] 2023.

Misc activities

Certifications

  • Certified Junior Project Manager, IAPM International Association of Project Managers
  • German language certification, Deutsche Sprachprüfung für den Hochschulzugang (DSH); DSH-2 certified

Conducted workshops

  • [Online] Workshop for HeFDI (Hessian Research Data Infrastructures) Code School in November 2023 - Introduction to software testing - Unit testing, acceptance testing, code-quality checks and test automation. # participants: 94. DOI: 10.5281/zenodo.10185185
  • [Online] Workshop for HeFDI (Hessian Research Data Infrastructures) Code School in June 2023 - Introduction to software testing - Unit testing, acceptance testing, code-quality checks and test automation. # participants: 72. DOI: 10.5281/zenodo.8069918
  • [Online] Workshop for TU Braunschweig in August 2022: Suresoft workshop series - Introduction to software testing - Unit testing, acceptance testing, code-quality checks and test automation. # participants: 47. DOI: 10.24355/dbbs.084-202212141407-0
  • [Online] Workshop for TU Braunschweig in September 2022: Suresoft workshop series - Introduction to Continuous Integration (CI) with GitLab and Containerization with Docker. # participants: 39. DOI: 10.24355/dbbs.084-202212141353-0

Teaching activities

  • Lecture on “Modelling of complex systems / Modellierung komplexe Systeme” for bachelor course Digitalisation in Aerospace Engineering (Digitalisierung Luft und Raumfahrtechnik). April, 2024.
  • Lecture on “Data and Code Management” for bachelor course Digitalisation in Aerospace Engineering (Digitalisierung Luft und Raumfahrtechnik). April, 2024.
  • Teaching assistant for master course “Computational Acoustics”. 2024.
  • Teaching assistant for master course “Computational Acoustics”. 2023.
  • Teaching assistant for master course “Computational Acoustics”. 2022.
  • Teaching assistant for master course “Computational Acoustics”. 2021.
  • Teaching assistant for master course “Computational Acoustics”. 2020.
  • Teaching assistant for master course “Computational Acoustics”. 2019.

Other talks/invited lectures

  • Error-controlled local interpolation of moment matching reduced order models for vibroacoustics. Invited talk in minisymposium “Error-Controlled Adaptive Algorithms in Full-Order and Reduced-Order Model Simulations”. International Congress on Industrial and Applied Mathematics (ICIAM) 2023, Waseda University, Tokyo, Japan.
  • Machine-Learning and efficient computational models in acoustics. TU Braunschweig lecture series Fascination Acoustics in summer semester 2021.

Supervised theses

  • Sustainable software development through continuous integration considering high-performance computing aspects in vibroacoustics. Master Thesis. 2024.
  • Low-rank approximation based separate bases reduction approaches for coupled vibroacoustic models. Student Project. 2023.
  • A statistical approach for the fusion of data and finite element analysis in vibroacoustics. Master Thesis. 2021.
  • Pole-matching technique for parametric model order reduction of second-order vibroacoustic systems. Master Thesis. 2021.
  • Efficient parameterization of vibroacoustic models for model order reduction. Student Project. 2020.
  • Modal projection techniques for model order reduction of vibroacoustic systems. Student Project. 2020.
  • Finite element based approach on defining standards and benchmarks for an automated testing environment. Student Project. 2020.

Hobbies

Cycling 🚴, padel tennis 🎾, photography 📷, travelling ✈️

Follow my instagram handle for my favorite pictures ;)

Dr.-Ing. Harikrishnan Sreekumar - hk.sreekumar@icloud.com