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Dr.-Ing. Mike Nicolai

Scientific Co-Worker
Rogowski Building, 2nd floor, room 224,
Schinkelstraße 2, 52062 Aachen
Tel : +49 241 80 99920
Fax : +49 241 80 22430
email: nicolai[at]

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Research Interests

Research Goal

The goal of my research is to build a computational framework for shape optimization for fluids involving 3D geometries on parallel machines. The work divides into three main topics. The first part concerns the overall software framework, which couples the flow solver with an optimization driver. This optimization driver can handle several different optimization libraries (e.g. DONLP2 or BOBYQA), without influencing the flow solver software dramatically. The second part deals with the shape parameterization and deformation of realistic engineering geometries for shape optimization without re-meshing, utilizing T-splines for representing geometries as one water-tight surface. The third part treats the analytic gradients needed for gradient-based optimization methods: here the discrete adjoint method will be used.

Publications and Talks

CMAME M. Nicolai, S. Elgeti and M. Behr, Shape Optimization for Fluids using T-Splines for Shape Representation at 81st Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM2010), Karlsruhe, 24. March 2010.
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CMAME M. Probst, M. Lülfesmann, M. Nicolai, M. Bücker, M. Behr and C.H. Bischof, Sensitivity of Optimal Shapes of Artificial Grafts with Respect to Flow Parameters, Computer Methods in Applied Mechanics and Engineering, 199 (2010) 997–1005.
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Kunststoffe W. Michaeli, M. Behr, S. Elgeti, M. Probst, M. Nicolai, B. Fink and C. Windeck, Die Design: Automatically Optimizing Profile Dies, Kunststoffe International, 7 (2009) 28–30.
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LNCS M. Nicolai, Towards Shape Optimization for Fluids Involving Complex Shape Parameterization, at SIAM Conference on Computational Science and Engineering (CSE09), Miami, 2. March 2009.
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LNCS M. Behbahani, M. Behr, M. Nicolai and M. Probst, Towards Shape Optimization for Ventricular Assist Devices Using Parallel Stabilized FEM, in Proceedings of the NIC Symposium 2008, p.325-331, NIC Series (2008).
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LNCS M. Behr, M. Nicolai and M. Probst, Efficient Parallel Simulations in Support of Medical Device Design, in Parallel Computing: Architectures, Algorithms and Applications, Proceedings of the International Conference ParCo 2007, NIC Series (2007) 19–28. [PDF (2,560K)]
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LNSC Brian J.N. Wylie, Markus Geimer, M. Nicolai and Markus Probst Performance analysis and tuning of the XNS CFD solver on BlueGene/L, In: Lecture Notes in Computer Science 4757, Proc. 14th EuroPVM/MPI Conf. (Paris, France), pp. 107-116, Springer-Verlag, Sep. 2007
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inSIDE M. Behbahani, M. Nicolai, M. Probst, M. Behr, Simulation of Blood Flow in a Ventricular Assist Device, In: inSiDE: Innovatives Supercomputing in Deutschland , Vol. 5 No. 1 , Spring 2007, article (pdf), (2007).
EUCCO07 M. Nicolai, M.Behr Portable optimization framework for serial and parallel machines., In: Second European Conference on Computational Optimization , Montpellier, 3. April 2007
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JNNFM M. Behbahani, M. Nicolai Interaktive Exploration von Blutströmungsprozessen in Herzpumpen, In: VRCA Jahresbericht 2005/2006 , Aachen, Oktober 2006, p.88-90
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JNNFM M. Nicolai, M. Behr and F. Abraham, SHAPE OPTIMIZATION IN BIOFLUID FLOW PROBLEMS,In: Workshop on Advances in Continuous Optimization, Reykjavik 1. July 2006
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