2.2.8.1 fix acc

fix acc is used to add user-specified acceleration to a certain group of particles.

Syntax:

• id: user assigned name for this fix
• group-id: the fix is applied only to the particles in this group id
• options-keyword: gravity, region
  • gravity dimension value
  • region region-id

Examples:

Description:

If option-keyword gravity is used, the user-defined magnitude (“value”) can only be applied in one “dimension”, which can be specified by x, y or z. A negative value will indicate an opposite direction of standard Cartesian coordinate.

If option-keyword region is used, only particles in this “region id” will be applied with this fix.