Derek Groen, CCS, Chemistry Department, University College London

Welcome to the webpage about me, Derek Groen. I am an interdisciplinary computational researcher working in the Centre for Computational Science at UCL. I currently work on the European CRESTA project ( and have worked on the MAPPER project in the recent past ( In the near future I will work on the CER2EBRAL project in collaboration with several institutes in Qatar. In addition, I am an Associate Fellow of 2020 Science ( and a Fellow of the Software Sustainability Institute

My main research interests include (in arbitrary order):

Contact information:

Centre for Computational Science
University College London
20 Gordon Street
WC1H 0AJ London
United Kingdom
Phone: +44 (0)20 7679 5300
Email: d.groen "at"

Recent appearances in the media

Interview by the Independent on cerebrovascular bloodflow with HemeLB: Computer simulation could become integral in the diagnosis, treatment, or preventation of disease by the end of the century.

Interview by International Science Grid This Week ( on just about anything I've been involved with recently: Blood flow in the brain, multi-scale modeling, and more. life as an early-career HPC researcher.

Article on MUSCLE in HPCWide: Adding MUSCLE to Multiscale Simulations.

Selected papers on topics I am currently working on:

MAPPER: Flexible composition and execution of high performance, high fidelity multiscale biomedical simulations:
http: //
Interface Focus volume 3, issue 2, 2013.

MAPPER: A Survey of multiscale and multiphysics applications and communities:
accepted by CiSE.

MPWide: A light-weight library for message passing over wide area networks:

MAPPER: A first article on distributed multiscale simulation of nanocomposites:

Analysing and modelling the performance of the HemeLB lattice-Boltzmann simulation environment

Selected papers on topics I have previously worked on:

SUSHI: A cosmological TreePM N-body code that runs distributed across multiple supercomputers:
More recent conference paper on an improved version:

The CosmoGrid Project: Simulating the universe on an intercontinental grid:

The Living Application: a method to perform distributed multi-solver simulations dynamically and autonomously.

Global GRAPE Grid (G3) Project: Running N-body simulations of star clusters across a network of dedicated hardware sites:

Posters and slidesets

Papers tend to be written with the intent to be read by other scientists, and might not be very useful for people without a similar background. Because poster presentations and slide sets are usually more accessible than scientific papers, here are a few of them:

1. Multiscale Computing with HemeLB (coupling simulations of human bloodflow)
2. Simulating star clusters on a global grid of PCs with GRAPE hardware
3. Simulating the Universe across two supercomputers, one in Amsterdam and one in Tokyo
4. Simulating the Universe across a planet-wide network of up to four supercomputers
5. A light-weight communication library for distributed computing

All of the posters relate directly to a journal article, so if you would like to know more feel free to check the papers. And if your thirst for knowledge on these topics is still insufficiently quenched after that, do not hesitate to contact me directly.

General information about my academic work

If you are interested about all my other publications, then I would recommend to take a look at my Google Scholar page.

Related software

This section provides a listing of public pages and repositories of software I have contributed to.

1. MPWide.
2. HemeLB.


Did you happen to have found a ring with my name on it recently?