Chair of Computational Science
Clausiusstrasse 33
ETH-Zentrum, CLT C 11
CH-8092 Zürich

Fabian Wermelinger


Fabian Wermelinger

PhD Student

Research and Interests

  • Compressible Single- and Multi-Phase Flows
  • Incompressible Flows
  • Data Compression
  • High Performance Computing
  • Software Development


  • MSc in Mechanical Engineering, D-MAVT, ETH Zürich, 2014


  • TA: High Performance Computing for Science and Engineering (HPCSE) I – Fall 2017
  • TA: Engineering Tool III: Object oriented programming with C++ – Spring 2016
  • TA: High Performance Computing for Science and Engineering (HPCSE) I – Fall 2015



  • F. Wermelinger, U. Rasthofer, P. E. Hadjidoukas, and P. Koumoutsakos, “Petascale simulations of compressible flows with interfaces,” Journal of computational science, vol. 26, p. 217–225, 2018.
    [BibTeX] [Abstract] [PDF] [DOI]

    We demonstrate a high throughput software for the efficient simulation of compressible multicomponent flow on high performance computing platforms. The discrete problem is represented on structured three-dimensional grids with non-uniform resolution. Discontinuous flow features are captured using a diffuse interface method. A distinguishing characteristic of the method is the proper treatment of the interface zone as a mixing region of liquid and gas. The governing equations are discretized by a Godunov-type finite volume method with explicit time stepping using a low-storage Runge-Kutta scheme. The presented flow solver Cubism-MPCF is based on our Cubism library which enables a highly optimized framework for the efficient treatment of stencil based problems on multicore architectures. The framework is general and not limited to applications in fluid dynamics. We validate our solver by classical benchmark examples. Furthermore, we examine a highly-resolved shock-induced bubble collapse and a cloud of O(10^3) collapsing bubbles, which demonstrate the high potential of the proposed framework and solver.

    author = {F. Wermelinger and U. Rasthofer and P.E. Hadjidoukas and P. Koumoutsakos},
    doi = {10.1016/j.jocs.2018.01.008},
    journal = {Journal of Computational Science},
    month = {may},
    pages = {217--225},
    publisher = {Elsevier {BV}},
    title = {Petascale simulations of compressible flows with interfaces},
    url = {},
    volume = {26},
    year = {2018}


  • U. Rasthofer, F. Wermelinger, P. Hadjidoukas, and P. Koumoutsakos, “Large scale simulation of cloud cavitation collapse,” Procedia computer science, vol. 108, p. 1763–1772, 2017.
    [BibTeX] [PDF] [DOI]
    author = {U. Rasthofer and F. Wermelinger and P. Hadjidoukas and P. Koumoutsakos},
    doi = {10.1016/j.procs.2017.05.158},
    journal = {Procedia Computer Science},
    pages = {1763--1772},
    publisher = {Elsevier {BV}},
    title = {Large Scale Simulation of Cloud Cavitation Collapse},
    url = {},
    volume = {108},
    year = {2017}


  • F. Wermelinger, B. Hejazialhosseini, P. Hadjidoukas, D. Rossinelli, and P. Koumoutsakos, “An efficient compressible multicomponent flow solver for heterogeneous CPU/GPU architectures,” in Proceedings of the platform for advanced scientific computing – PASC ’16, 2016.
    [BibTeX] [PDF] [DOI]
    author = {Fabian Wermelinger and Babak Hejazialhosseini and Panagiotis Hadjidoukas and Diego Rossinelli and Petros Koumoutsakos},
    booktitle = {Proceedings of the Platform for Advanced Scientific Computing - {PASC} {\textquotesingle}16},
    doi = {10.1145/2929908.2929914},
    publisher = {{ACM} Press},
    title = {An Efficient Compressible Multicomponent Flow Solver for Heterogeneous {CPU}/{GPU} Architectures},
    url = {},
    year = {2016}


  • P. E. Hadjidoukas, D. Rossinelli, F. Wermelinger, J. Sukys, U. Rasthofer, C. Conti, B. Hejazialhosseini, and P. Koumoutsakos, “High throughput simulations of two-phase flows on Blue Gene/Q,” in Parallel computing: on the road to exascale, proceedings of the international conference on parallel computing, parco 2015, 1-4 september 2015, edinburgh, scotland, UK, 2015, p. 767–776.
    [BibTeX] [PDF] [DOI]
    author = {Panagiotis E. Hadjidoukas and Diego Rossinelli and Fabian Wermelinger and Jonas Sukys and Ursula Rasthofer and Christian Conti and Babak Hejazialhosseini and Petros Koumoutsakos},
    booktitle = {Parallel Computing: On the Road to Exascale, Proceedings of the International Conference on Parallel Computing, ParCo 2015, 1-4 September 2015, Edinburgh, Scotland, {UK}},
    doi = {10.3233/978-1-61499-621-7-767},
    pages = {767--776},
    title = {High throughput simulations of two-phase flows on {Blue Gene/Q}},
    url = {},
    year = {2015}