High Performance Computing and Visualization (HPCViz)

High Performance Computing and Visualization (HPCViz) focuses on developing new concepts for improved usage of high-performance computer systems. This includes both modelling and simulation as well as analysis and synthesis of visual data.

The departments combines three research areas at CSC: the research on high performance and distributed computing at PDC, the Computational Technology Laboratory (CTL) and its research on modeling and simulation, as well as VIC (Visualization, Interaction and Collaboration) Stockholm, the KTH visualization studio.

Research paper on magnetic connection points published in Nature Physics

HPCViz researcher Stefano Markidis is the co-author of a new paper that has been published in Nature Physics. The paper concerns the possibility that the NASA MMS mission could find many more magnetic reconnection points (points in space where the magnetic field energy is converted to kinetic energy of plasma jets) than the ones that are expected. The paper can be found here.


This figure shows electron density in magnetic flux ropes produced by reconnection as nested isosurfaces (a) and as a cut on the central plane (b). Also shown is electron speed (c).

Research paper from HPCViz selected as editor's choice in Phys. Rev. E

The paper " Idle waves in high-performance computing" has been selected as an editor's choice in Physical Review E. The authors are Stefano Markidis, Juris Vencels, Ivy Bo Peng, Dana Akhmetova, and Erwin Laure from HPCViz, as well as Pierre Henri from LPC2E–CNRS, Orléans, France.

The paper concerns parallel scientific applications and how they distribute computation among processes. The paper identifies the propagation of idle waves through processes in scientific applications with a local information exchange between the two processes. The study provides a description of the large number of processes in parallel scientific applications as a continuous medium and is a step towards an understanding of how localized idle periods can affect remote processes.

In the top panel, a contour plot of busy periods in a simulation. The bottom panel shows the numerical dispersion relation of idle waves.

HPCViz seminar series continues

It's time to start the seminar series at HPCViz for 2015, where researchers from the department are mixed with guests from other universities, departments and companies to spread knowledge and open up for new collaborations. About every other week a new seminar will appear and be announced on the HPCViz calendar.

The starting session for 2015 features Ivy Bo Peng from KTH who will speak about exascale simulations of solar winds and the magnetosphere. The seminar takes place in the Visualization Studio VIC on January 28, between 14-15. Visitors are welcome, but primarily the event aims at staff at HPCViz.

A visualization of the interaction between a solar wind and the magnetosphere.

PDC's new super computer

During the autumn, KTH's new super computer will be arriving to PDC. It will be the fastest computer for academic use in the Nordic countries, being able to perform almost 2 petaflops. The computer is a Cray XC30 with 1 676 nodes and it will be used for, among other things, flow mechanics, climate modelling, plasma physics, neuro science, materials science and simulations at a molecular level.

HPCViz researcher on the moon's magnetic future

Stefano Markidis, assistant professor in High Performance Computing at HPCViz, has recently been featured on the cover of Physical Review Letters for the paper " Electromagnetic Particle-in-Cell Simulations of the Solar Wind Interaction with Lunar Magnetic Anomalies".

The paper describes the formation of mini-magnetosphere on our moon and studies its stability against the flowing solar wind. The formation of stable mini-magnetospheres on the moon might have an important impact on the settlement of human colonies on the moon as magnetosphere protect people from particles and radiation coming from solar storms. 

Physical Review Letters, Vol. 112, Issue 15

Supercomputer opens the universe

The muffled rumble from the fans that cool the super computers is deafening. Data is processed here 24 hours a day, all year round, with a capacity that is hard to grasp.Simulations are being run at KTH's parallel computer centre, PDC, which are giving old theories new life.

Supercomputer opens doors to the universe

Revealing the secrets of the human voice

A model of the human voice, which is being built at KTH Royal Institute of Technology in Stockholm, could lead to better voice care, voice prosthetics, talking robots and teaching opportunities. Johan Hoffman of HPCViz is one of the researchers.

Revealing the secrets of the human voice

Mathematics for Life

KTH researchers are developing advanced computer simulations that may help decrease the number of experiments on animals and at the same time reduce environmental protection.

“Simulation can already reduce the need to produce industrial prototypes,” says Johan Hoffman, professor of numerical analysis at KTH. “And computer simulation may soon be used as decision support for certain medical procedures.”

Mathematics for Life

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