fix_modify AtC rates <add | delete> <list_of_fields> 
 fix_modify AtC rates add temperature velocity stress  
  fix_modify AtC rates delete stress  
 
Requests calculation and ouput of rates (time derivatives) of the fields from the transfer class. For eulerian analysis (see fix_modify AtC atom_element_map ), these rates are the partial time derivatives of the nodal fields, not the full (material) time derivatives. 
 
Must be used with the hardy/field type of AtC fix ( see fix atc command )
No rates are calculated by default
 1.6.1
 1.6.1