Kiran Sagar Kollepara
Postdoctorant,
UMR 6183 - Institut de recherche en génie civil et mécanique (GeM),
Ecole Centrale de Nantes, Nantes, France
50%
Libre accès
2
Documents
Affiliations actuelles
- 1088548
- 1086798
Identifiants chercheurs
- kiran-sagar-kollepara
- 0000-0002-8847-9006
- Google Scholar : https://scholar.google.fr/citations?user=QGyvs7YAAAAJ&hl=en
Présentation
Personal details:
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Mail: <sagar1990@gmail.com>, <kiran-sagar.kollepara@ec-nantes.fr>
Nationality: Indian
Education:
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Erasmus Master of Science in Computational Mechanics (2015-2017)
[UPC, Barcelona, Spain](http://www.upc.edu "Universitat Politècnica de Catalunya"),
[ECN, Nantes, France](http://www.ec-nantes.fr "Ecole Centrale de Nantes")
Bachelor of Technology in Aerospace Engineering (2008-2012)
[IIST, Thiruvananthapuram, India](http://www.iist.ac.in "Indian Institute of Space Science and Technology")
Research Experience:
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Postdoctoral Research : Non-intrusive reduced order modelling for non-cartesian parametric domains using sparse subspace learning approach, 2023-current
[Research Institute in Civil and Mechanical Engineering](https://gem.ec-nantes.fr "GeM"), [ECN, Nantes, France](http://www.ec-nantes.fr "Ecole Centrale de Nantes")
PhD thesis titled "Low-rank and sparse approximations for contact mechanics" , defended on 5th July 2022
[Research Institute in Civil and Mechanical Engineering](https://gem.ec-nantes.fr "GeM"), [ECN, Nantes, France](http://www.ec-nantes.fr "Ecole Centrale de Nantes")
> Limitations of low-rank models to solve contact mechanics problems with regards to the local nature of contact position is investigated. To mitigate the errors due to these local effects, overcomplete dictionary-based models explored. Two different strategies are proposed to resolve the dictionary-based approximation problem. Finally, DTW-based non-linear interpolations are utilized to reduce the offline cost of creating overcomplete dictionaries.
Master Thesis: Enforcing the tensor structure of non-separable and non-linear problems
[Institut de Calcul Intensif](https://ici.ec-nantes.fr/ "ICI"), [ECN, Nantes, France](http://www.ec-nantes.fr "Ecole Centrale de Nantes")
> Proper Generalized Decomposition (PGD) is a well known tensorization based technique to efficiently solve high-dimensional PDEs. Solving non-linear PDEs in the framework of PGD is non-trivial, as a tensorized form of the non-linear term is not readily available. To this end, interpolative techniques were explored to perform tensorization of the nonlinear term.
Numerical analysis of retrograde flow in the lamellipodium of cell
[Laboratori de Càlcul Numèric](https://www.lacan.upc.edu/ "LaCàN"), [UPC, Barcelona, Spain](http://www.upc.edu "Universitat Politècnica de Catalunya")
> Keratocytic cells use a polymerization-depolymerization cycle known as actin treadmilling as a mechanism of cell transport. A mathematical model of tread-milling process is solved numerically. A coupled system of transport equations that model the treadmiling process, are modeled using Finite Element method aided by SUPG stabilization.
Internship: Real-time computation of the Incident Wave fields on the boundary of a harbour
[Laboratori de Càlcul Numèric](https://www.lacan.upc.edu/ "LaCàN"), [UPC, Barcelona, Spain](http://www.upc.edu "Universitat Politècnica de Catalunya")
> Reduced models to compute incident wave fields were developed for prediction of wave behaviour at harbours
Teaching Experience
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Tutorials: Linear Algebra, Ordinary differential equations
Practicals: Programming (C++), Data structures (Python), Numerical methods and optimization (MATLAB)
Skills
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Language: French (intermediate), English (fluent)
Programming: Python, MATLAB (advanced) and C++ (intermediate), OpenMP (beginner)
Domaines de recherche
Modélisation et simulation
Mécanique des structures [physics.class-ph]
Génie mécanique [physics.class-ph]
Compétences
Python (advanced)
MATLAB (advanced)
C++ (intermediate)
OpenMP (beginner)
Publications
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Tensor representation of non-linear models using cross approximationsJournal of Scientific Computing, 2019, ⟨10.1007/s10915-019-00917-2⟩
Article dans une revue
hal-01996047v2
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Optimum Buoyant and Aerodynamic Lift for a Lifting-Body Hybrid AirshipJournal of Aircraft, 2014, 51 (5), pp.1345-1350. ⟨10.2514/1.c032038⟩
Article dans une revue
hal-03656106v1
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