Predefined Variables

This section lists some predefined variables that are available to evaluate heat fluxes, sources, and integral quantities used in energy balance. All the variable names begin with the physics interface name (the prefix). By default the Heat Transfer interface prefix is ht, and the Heat Transfer in Thin Shells interface prefix is htsh. As an example, you can access the variable named tflux using ht.tflux (as long as the physics interface is named ht).

Table 3-1: Heat Transfer Predefined Variables
Variable	Name	Geometric Entity level
dEiInt	Total Accumulated Heat Rate	Global
ntfluxInt	Total Net Heat Rate	Global
QInt	Total Heat Source	Global
WnsInt	Total Fluid Losses	Global
dEi0Int	Total Accumulated Energy Rate	Global
ntefluxInt	Total Net Energy Rate	Global
tflux	Total Heat Flux (Heat Transfer interface)	Domains, boundaries
dflux	Conductive Heat Flux (Heat Transfer interface)	Domains, boundaries
cflux	Convective Heat Flux (Heat Transfer interface)	Domains, boundaries
turbflux	Turbulent Heat Flux (Heat Transfer interface)	Domains, boundaries
trlflux	Translational Heat Flux (Heat Transfer interface)	Domains, boundaries
teflux	Total Energy Flux (Heat Transfer interface)	Domains, boundaries
not applicable	Radiative Heat Flux (Heat Transfer interface)	Domains
rflux_u rflux_d rflux_z	Radiative Out-of-Plane Heat Flux (Heat Transfer interface)	Out-of-plane domains (1D and 2D), boundaries
q0_u q0_d q0_z	Out-of-Plane Inward Heat Flux (Heat Transfer interface)	Out-of-plane domains (1D and 2D)
h	Heat transfer coefficient (see The Heat Transfer Coefficients)	Exterior boundaries
ntflux	Normal Total Heat Flux (Heat Transfer interface)	Boundaries
ndflux	Normal Conductive Heat Flux (Heat Transfer interface)	Boundaries
ncflux	Normal Convective Heat Flux (Heat Transfer interface)	Boundaries
ntrlflux	Normal Translational Heat Flux (Heat Transfer interface)	Boundaries
nteflux	Normal Total Energy Flux (Heat Transfer interface)	Boundaries
ndflux_u	Internal Normal Conductive Heat Flux, Upside (Heat Transfer interface)	Interior boundaries
ndflux_d	Internal Normal Conductive Heat Flux, Downside (Heat Transfer interface)	Interior boundaries
ncflux_u	Internal Normal Convective Heat Flux, Upside (Heat Transfer interface)	Interior boundaries
ncflux_d	Internal Normal Convective Heat Flux, Downside (Heat Transfer interface)	Interior boundaries
ntrlflux_u	Internal Normal Translational Heat Flux, Upside (Heat Transfer interface)	Interior boundaries
ntrlflux_d	Internal Normal Translational Heat Flux, Downside (Heat Transfer interface)	Interior boundaries
ntflux_u	Internal Normal Total Heat Flux, Upside (Heat Transfer interface)	Interior boundaries
ntflux_d	Internal Normal Total Heat Flux, Downside (Heat Transfer interface)	Interior boundaries
nteflux_u	Internal Normal Total Energy Flux, Upside (Heat Transfer interface)	Interior boundaries
nteflux_d	Internal Normal Total Energy Flux, Downside (Heat Transfer interface)	Interior boundaries
tflux	Total Heat Flux (Heat Transfer in Thin Shells interface)	Boundaries
dflux	Conductive Heat Flux (Heat Transfer in Thin Shells interface)	Boundaries
cflux	Convective Heat Flux (Heat Transfer in Thin Shells interface)	Boundaries
teflux	Total Energy Flux (Heat Transfer in Thin Shells interface)	Boundaries
ttflux	In-Plane Total Heat Flux (Heat Transfer in Thin Shells interface)	Exterior boundaries
tdflux	In-Plane Conductive Heat Flux (Heat Transfer in Thin Shells interface)	Exterior boundaries
tcflux	In-Plane Convective Heat Flux (Heat Transfer in Thin Shells interface)	Exterior boundaries
tteflux	In-Plane Total Energy Flux (Heat Transfer in Thin Shells interface)	Exterior boundaries
q0	Inward Heat Flux (Heat Transfer interface)	Boundaries
rflux	Radiative Heat Flux (Heat Transfer interface)	Boundaries
Qtot	Domain Heat Sources	Domains
Qbtot	Boundary Heat Sources	Boundaries
Qltot	Line heat source (Line and Point Heat Sources)	Edges, Points (2D, 2Daxi)
Qptot	Point heat source (Line and Point Heat Sources)	Points
T_amb	Ambient temperature	Global
p_amb	Ambient absolute pressure	Global
v_amb	Wind velocity	Global
phi_amb	Ambient relative humidity	Global
Is_amb	Ambient solar irradiance	Global
Ish_amb	Clear sky noon diffuse horizontal irradiance	Global
Isn_amb	Clear sky noon beam normal irradiance	Global
xvap_amb	Ambient moisture content	Global
alpha	Damage indicator (see Theory for Bioheat Transfer)	Domains
alpha1	Damage indicator (see Theory for Bioheat Transfer)	Domains
alpha2	Instant tissue necrosis indicator (see Theory for Bioheat Transfer)	Domains
theta_d	Fraction of damage (see Theory for Bioheat Transfer)	Domains
theta_d_sm	Fraction of total damage (see Theory for Bioheat Transfer)	Domains
T_dp	Dew Point Temperature	Domains
T_eq	Equivalent Temperature	Domains
psat	Saturation Pressure	Domains
phi	Relative Humidity	Domains
Lv	Latent Heat of Evaporation	Domains

Table 3-1: Heat Transfer Predefined Variables

Variable

Name

Geometric Entity level

dEiInt

Total Accumulated Heat Rate