cold gas approximation

cold gas approximation

[′kōld ¦gas ə‚präk·sə‚mā·shən]
(plasma physics)
An approximation according to which the sound speed is much smaller than the Alfvén speed or the gas pressure is much smaller than the magnetic pressure.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.