Add input option "ones" for solids monitors (!107)

docs/source_docs/user_guide/inputs/output/monitors.rst

@@ -141,7 +141,7 @@ The following table lists all the fluid phase variables that can be monitored:
 +--------------------------+-----------------------------------------------------------------------------------------+
 |                          | Description                                                                             |
 +==========================+=========================================================================================+
-| ones                     | values of :math:`phi` is set to 1.                                                      |
+| ones                     | value of :math:`\phi_{ijk}` is set to 1 in each fluid cell                              |
 +--------------------------+-----------------------------------------------------------------------------------------+
 | ep_g                     | fluid volume fraction                                                                   |
 +--------------------------+-----------------------------------------------------------------------------------------+
@@ -470,6 +470,8 @@ The following table lists all the solids phase variables that can be monitored:
 +--------------------------+-----------------------------------------------------------------------------------------+
 |                          | Description                                                                             |
 +==========================+=========================================================================================+
+| ones                     | value of :math:`\phi_p` is set to 1 for each solid particle                             |
++--------------------------+-----------------------------------------------------------------------------------------+
 | position                 | particles position (all the three components)                                           |
 +--------------------------+-----------------------------------------------------------------------------------------+
 | pos_[x/y/z]              | x, y, or z component of the particles position                                          |