By convention, we write the input files using capitalization to represent built in AcuSolve commands and lower case text to represent parameters and qualifiers.  For example:

MATERIAL_MODEL( “simple fluid” ) {

density_model                 = “simple fluid”

viscosity_model               = “simple fluid”

specific_heat_model           = “simple fluid”

conductivity_model            = “simple fluid”

}

However, the following syntax is also valid and will produce identical

results:

material_model( “simple fluid” ) {

DENSITY_MODEL                  = “simple fluid”

VISCOSITY_MODEL               = “simple fluid”

SPECIFIC_HEAT_MODEL        = “simple fluid”

CONDUCTIVITY_MODEL         = “simple fluid”

}

Note that user defined string values do respect case.  So, it is not possible to interchange “SIMPLE FLUID” with “simple fluid” when referring to this qualifier in subsequent commands.