DOC: Adding some doxygen style documentation

single-node/src/Explicit-Lagrange-Kokkos/SGH_solver/boundary.cpp

@@ -6,6 +6,17 @@
 #include "mesh.h"
 #include "state.h"
 
+/**
+ * \brief Apply velocity boundary conditions
+ *
+ * This function loops over all boundary nodes and applies boundary conditions
+ * depending on the definition of boundary set.
+ *
+ * \param mesh The mesh that boundary conditions are applied to
+ * \param boundary The type of boundary condition being applied
+ * \param node_vel A view into the nodal velocity
+ * \param time_value Current simulation time, uesd to apply transient boundary conditions
+ */
 void boundary_velocity(const mesh_t&                   mesh,
                        const CArrayKokkos<boundary_t>& boundary,
                        DViewCArrayKokkos<double>&      node_vel,

single-node/src/Explicit-Lagrange-Kokkos/SGH_solver/energy_sgh.cpp

@@ -1,7 +1,21 @@
-
 #include "mesh.h"
 #include "state.h"
 
+/**
+ * \brief Update specific internal energy for the SGH solver
+ *
+ * This function updates the specific internal energy of each element by 
+ * integrating the power (Force dotted into velocity) over the element.
+ *
+ * \param rk_alpha Time integration partition
+ * \param dt time increment
+ * \param mesh simulation mesh
+ * \param node_vel view into the nodal velocity memory
+ * \param node_coords view into the nodal position memory
+ * \param elem_sie view into the specific internal energy of each element
+ * \param elem_mass view into the element mass
+ * \param corner_force view into the corner forces
+ */
 void update_energy_sgh(double                           rk_alpha,
                        double                           dt,
                        const mesh_t&                    mesh,