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HPC-Europa2-related Presentations and Talks

March 13th 2012


Speaker: Francesca Lugli (University of Bologna)

Topic: Dynamics of the self-assembly of multiple active Brownian particles

Abstract: 
This talk addresses the computer modelling of the chemically self-propelled Janus swimmers with Dissipative Particle Dynamics (DPD) simulations of self-propelled colloidal particles immersed in a three-component fluid consisting of solvent, reactants and products that are in off-equilibrium conditions.

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November 8th 2011


Speaker:  Richard J. Jefferson-Loveday (University of Cambridge)

Abstract:

The presentation will give an overview of the recent hybrid large eddy simulation (LES) work performed at the Whittle Laboratory on gas turbine related flows and also of the current HPC-Europa2 project with HLRS to enhance our in-house high order LES solver BOFFS for large scale parallel computations.

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October 25th 2011


Speaker:  Richard J. Jefferson-Loveday (University of Cambridge)

Abstract: 

The aim of the HPC-Europa2 project is to enhance our high-order in-house LES solver 'BOFFS' to use a high order (sixth) numerical scheme at inter-block interfaces for MPI parallelization. This will be achieved through the use of 'ghost' nodes.  The second part is to modify the parallel code to allow multiple blocks to be assigned MPI processes. This will lead to much improved load balancing for the complex geometries often encountered in gas turbines.

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Speaker: Javier Fernandez Munoz (Carlos III University of Madrid)

Abstract: 
This talk presents the work done on the three months stay in HLRS facilities.  The main work is the implementation of an speculative compression module for comunications in openmpi. In summary it is a modification of the point to point comunications module in openmpi for rendevouz messages. Whenever a rendeveouz message is requested, the implementation fragment the message and queue the fragments so background threads can compress them. On the other hand when the acknowledge from the receiver arrives, the sender start to send those fragments whether they are compressed or not (first the compressed ones, then the others). This module allows to send partially compressed rendevouz messages where the level of compression depends of the requirements of the application and the hardware. Also it is a way to compensate in those enviroments where the CPU power available outmaches the network bandwitdh. The project implementation is recently finishing and the project is nowadays begining the benchmarking phase.

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