Merge pull request #556 from openforcefield/openmm-combine-forces

Combine non-bonded forces by default

Author: mattwthompson

docs/releasehistory.md

@@ -11,9 +11,13 @@ Please note that all releases prior to a version 1.0.0 are considered pre-releas
 
 ## 0.2.3 - Current development
 
+### Behavior changes
+* #554 `Interchange.to_openmm` now uses `combine_nonbonded_forces=True` by default.
+
 ### Bugfixes
 * #545 List the central atom first in CVFF style dihedrals in LAMMPS export
 
+
 ## 0.2.2 - 2022-10-12
 
 This pre-release of Interchange includes improvements in metadata in the Amber export.

openff/interchange/components/interchange.py

@@ -516,7 +516,7 @@ def to_lammps(self, file_path: Union[Path, str], writer="internal"):
         else:
             raise UnsupportedExportError
 
-    def to_openmm(self, combine_nonbonded_forces: bool = False):
+    def to_openmm(self, combine_nonbonded_forces: bool = True):
         """Export this Interchange to an OpenMM System."""
         from openff.interchange.interop.openmm import to_openmm as to_openmm_