Reimplement constant acceleration groups

[alexxy/gromacs.git] / docs / reference-manual / algorithms / group-concept.rst

diff --git a/docs/reference-manual/algorithms/group-concept.rst b/docs/reference-manual/algorithms/group-concept.rst
index 1c97ea602c6df8e894a90ec7360674e96dd9bca0..f62eae61ebb5e65eca19e15531e5d2edde1f4e1d 100644 (file)
--- a/docs/reference-manual/algorithms/group-concept.rst
+++ b/docs/reference-manual/algorithms/group-concept.rst
@@ -40,6 +40,14 @@ freeze group
     simulation, and afterward use position restraints in conjunction
     with constant pressure.
 
+accelerate group
+
+    On each atom in an “accelerate group” an acceleration
+    :math:`\mathbf{a}^g` is imposed. This is equivalent to
+    a mass-weighted external force. This feature makes it possible to
+    drive the system into a non-equilibrium state to compute,
+    for example, transport properties.
+
 energy-monitor group
 
     Mutual interactions between all energy-monitor groups are compiled