December 2018   |   Astrophysics

Astronomical magnetism

Modeling solar and planetary magnetic fields is a big job that requires a big code.

Aeronautics, Engineering
November 2018

Clean, quiet jets

Taking aircraft turbines for a simulated spin, an international team working on Oak Ridge’s Titan supercomputer aims to reduce jet noise and pollution.

Materials Science
October 2018

Quantum predictions

With faster supercomputers and improved algorithms, scientists are studying a broad range of materials to find useful properties.

September 2018

Superstars’ secrets

Supercomputing power and algorithms are helping astrophysicists untangle giant stars’ brightness, temperature and chemical variations.

Science Highlights

July 2018

Predicting magnetic explosions

Supercomputer simulations and theoretical analysis shed new light on when and how fast reconnection occurs.

Solar flares, coronal mass ejections and gamma-ray bursts are among the universe’s many explosive events involving ionized gas, called plasma, that are associated with magnetic reconnection. Reconnection breaks magnetic field lines and turns magnetic potential energy into kinetic energy of charged particles in the plasma. This energy conversion also causes what physicists call “sawtooth crashes” in tokamaks that are potentially damaging to electricity-producing fusion devices. Scientists may have found the trigger for these explosive events and, using supercomputer simulations, can predict when and under what conditions the events will occur.

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