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HAMM at the Rencontres du Numérique April 17-18

posted Apr 17, 2013, 3:33 AM by Christophe Prud'homme

The HAMM project will be present at the "Recontres du Numérique"  organized by ANR at Cité des Sciences et de l'Industrie
on April 17 and 18 2013.
HAMM will be on stage on April 18 at the "Fondements des Systèmes Numériques"  showroom and has been selected for an oral presentation.



Feel++ awarded 60 000 000 core hours by Prace 6th call

posted Feb 27, 2013, 2:50 AM by Christophe Prud'homme

It is my pleasure to announce that HP-Feel++ (High Performance Feel++) has been awarded 60 000 000 core hours on SUPERMUC (GAUSS@LRZ,Germany)[1] by the PRACE 6th regular call [2]. Among 88 projects submitted, 57 have been selected. HP-Feel++ has received fully the requested core hours. The project HAMM is an important contributor to this success.

 1. http://www.lrz.de/services/compute/supermuc/ 
 2. http://www.prace-ri.eu/

HP-Feel++ is a collaboration between U. of Strasbourg(France), U. Joseph Fourier(Grenoble, France), CNRS and U. Coimbra(Portugal). 

The HP-Feel++ project aims at developing two research applications that require now access of TIER-0 computing resources: blood flow rheology and high field magnets.

Although these domains are quite different they have been thoroughly developed for the past few years within the Feel++ project (http://www.feelpp.org). They share the same mathematical kernel that encompasses a large range of numerical methods to solve partial differential equations such as (i) arbitrary order continuous and discontinuous Galerkin methods in 1D, 2D and 3D, (ii) domain decomposition methods, (iii) fictitious domain methods, (iv) level-set methods or (iv) certified reduced basis methods.  These methods are developed and used easily using a domain specific language embedded in C++ mimicking the mathematical language associated to Galerkin methods. This language allows physicists, engineers and mathematicians to focus on the numerical methods as well the physics whilst it hides the computer science details (e.g. parallelism) or algebraic solvers and enables the user to ramp up very quickly from rapid prototyping numerical methods to large scale computations. Within this context, blood flow rheology and high field magnets are the two domains driving Feel++ developments.

In blood flow rheology, we are interested in simulating suspensions of red blood cells (RBC) in arteries and veins and in studying the fluid properties (i.e. the fluid apparent viscosity) either in healthy contexts (our current focus) or pathological contexts (in the longer term). Not only the RBC are deformable entities, arteries and veins deform also during blood pulse; in both cases fluid structure interaction modeling and simulations are required. We have developed two main alternatives to tackle these problems: (i) fluid structure interaction within the so-called Arbitrary Lagrangian Eulerian framework coupled with a fictitious domain method to handle the RBC and (ii) fluid structure interaction using level-set methods. In both cases, the computational and storage costs for realistic simulations require using the TIER-0 infrastructures.

As to high field magnets (i.e. magnetic intensity greater than 24T), they are being developed by a large scale equipment laboratory (Laboratoire national des champs magnetiques intenses) and they are accessible to the international scientific community through project calls. Studies range from solid physics to applied supra-conductivity and magneto-science. The design and optimisation of these high field magnets require the solution of large scale multi-physics (and mildly multi-scale) non-linear partial differential equations. Moreover to ensure a robust design, we need to assess uncertainties through quantile estimations and sensitivity analysis. The latter is built on the former as it requires hundred or thousands evaluations of the former. We have developed the so-called certified reduced basis in this context to reduce the computational cost within the uncertainty quantification and optimisation processes from millions of degrees of freedom to a few tens or hundreds. This huge computational gain requires however the acceptance of an intensive offline stage allowing to get the independence with respect to the costly (typically finite element) underlying models and which demands now the access to TIER-0 infrastructures.

Feel++ selected for the MesoChallenge in Grenoble and Strasbourg (Equip@Meso)

posted Jan 25, 2013, 11:14 PM by Christophe Prud'homme   [ updated Feb 27, 2013, 2:52 AM ]

Feel++ has been selected for the MesoChallenge in Strasbourg. We have proposed a project associated to our work in blood flow, blood flow rheology and high field magnets and we should have full access to the new equip@meso Bull (Grenoble) and NEC (Strasbourg) super computers.

Feel++ @ Rencontres INRIA-Industrie in Strasbourg on biomedical applications

posted Nov 19, 2012, 1:25 PM by Christophe Prud'homme

Feel++ will be present in the Rencontres INRIA Industrie showroom at the AMIES stand. The demo will be about Blood Flow Simulation.
We present simulations of blood flows in complex realistic geometries, e.g. the arterial network. These simulations rely on high performance computing and parallel computing in particular without which these simulations would not be feasible. Different flow configurations will be presented as well as different models involving for example the interaction between the arterial wall and the blood. These simulations are done using a free software called Feel++.In a second part we present the VivaBrain project whose objectives are to simulate angiographic data in MRI based on anatomical, dynamical and realistic models obtained from real data.

Feel++ now on the TGCC

posted Jun 26, 2012, 5:51 AM by Christophe Prud'homme

Feel++, one of the software library developed in the context of HAMM, is now ported and works on the TGCC.
Scalability results and applications are on the way.

1st HAMM Workshop on March 13 2012

posted Feb 25, 2012, 6:15 AM by Christophe Prud'homme

The first HAMM workshop will be held @ Grenoble at the Laboratoire Jean Kuntzmann on March 13 2012. The programme will be available in the next few days.

1st Feel++ User Day on March 12 2012

posted Feb 25, 2012, 6:14 AM by Christophe Prud'homme

The first Feel++ User day will take place @ Laboratoire Jean Kuntzmann (Univ. Joseph Fourier Grenoble 1) on March 12 2012.
Programme and free registration (to organize coffee and lunch breaks)  are available here 

Job position in HAMM

posted Feb 13, 2012, 8:08 AM by Christophe Prud'homme

A Postdoctorate position is available now for 2 years. The partners involved are CEA and UJF.
see Project Documents for more information.

HAMM web site created

posted Feb 13, 2012, 8:07 AM by Christophe Prud'homme

The HAMM project web site has been created. 

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