functionceiling
Free convection, ceiling
Extends from Buildings.HeatTransfer.Convection.Functions.HeatFlux.BaseClasses.PartialHeatFlux (Partial function for convective heat flux).
Information
This function computes the buoyancy-driven convective heat flux as
q̇ = h ΔT,
where ΔT is the solid temperature minus the fluid temperature and h is the convective heat transfer coefficient for a ceiling, computed as
h=k |ΔT|0.3333,
where k=1.51 if the fluid is warmer than the ceiling, or k=0.76 otherwise.
Inputs
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.TemperatureDifference | dT (from PartialHeatFlux) | Temperature difference solid minus fluid |
Outputs
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.HeatFlux | q_flow (from PartialHeatFlux) | Convective heat flux from solid to fluid |
Revisions
-
July 28, 2014, by Michael Wetter:
Updated documentation. -
March 10 2010, by Michael Wetter:
First implementation.