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/*
Version 13 - 22. juni 2004
UDF for combustion of C and devolatilization
Update of C content
Update of volatile content
Update of porosity
O2 source
CO source
CO2 source
H2 source
CH4 source
Energy source
Incident radiative heat
Flux based char gasification
Flux based evaporation
No condensation
Direct update of porosity
Moisture source as Arrhenius expression

Definition of User Defined Memories:
(Utilized for description of solid properties of cells)
UDM0: Initial total mass
UDM1: Total mass
UDM2: C mass
UDM3: Votalile mass
UDM4: Moisture mass
UDM5: Porosity
UDM6: Total mass source
UDM7: Moisture mass source
UDM8: Volatile mass source
UDM9: Ash mass
UDM10: CO mass source, from C combustion
UDM11: CO mass source, from volatiles
UDM12: C mass fixed char reacted
*/
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