Use this node to model inflow of heat through a virtual domain, at inlet boundaries of non-solid domains. The upstream temperature Tustr and upstream absolute pressure
pustr are known at the outer boundary of the virtual domain. The inflow condition is often similar to a temperature condition. However using this condition the upstream temperature is not strictly enforced at the inlet. The higher the flow rate, the smallest difference between the inlet temperature and upstream temperature. In case of heat sources or temperature constraints close to the inlet boundary, the inflow condition induces a temperature profile that approaches to the temperature profile that would be obtained by computing the solution in the virtual domain upstream the inlet.
where ΔH is the sensible enthalpy
. See
Theory for the Inflow Boundary Condition for the definition of
ΔH and details about the Danckwerts condition
.
The Upstream temperature Tustr should be specified. For
User Defined, enter a value or expression. Else, select any available input (like
Ambient temperature defined in an
Ambient Properties node under
Definitions).
Select the Specify upstream absolute pressure check-box to set a different value than the absolute inlet pressure for the
Upstream absolute pressure pustr, and account for work done by pressure forces in the expression of the enthalpy. For
User Defined, enter a value or expression. Else, select an
Ambient absolute pressure defined in an
Ambient Properties node under
Definitions.
