modelRoomOnlySurfaceBoundary
Natural convection in an empty room with only surface boundary
Extends from Modelica.Icons.Example (Icon for runnable examples), Buildings.ThermalZones.Detailed.Examples.FFD.BaseClasses.PartialRoom (Partial model for a room).
Information
This model tests the coupled simulation of Buildings.ThermalZones.Detailed.CFD with the FFD program by simulating the natural convection in an empty room with only surface boundaries. It is also used to test the adiabatic boundary conditon in the FFD code.
Figure (a) shows the schematic of the FFD simulation. The following conditions are applied in the Modelica model:
- East Wall: Fixed temperature at 40°C,
- West Wall: Fixed temperature at 10°C,
- North and South Wall, Ceiling, Floor: Fixed heat flux at 0 W/m2.
Figure (a)
Figure (b) shows the velocity vectors and temperature contours in degree Celsius on the X-Z plane at Y = 0.5 m as simulated by the FFD.
Figure (b)
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | nConExtWin (from PartialRoom) | 0 | Number of constructions with a window |
| Integer | nConBou (from PartialRoom) | 0 | Number of surface that are connected to constructions that are modeled inside the room |
| Integer | nSurBou (from PartialRoom) | 0 | Number of surface that are connected to the room air volume |
| Integer | nConExt (from PartialRoom) | 0 | Number of exterior constructions withour a window |
| Integer | nConPar (from PartialRoom) | 0 | Number of partition constructions |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Buildings.ThermalZones.Detailed.CFD | roo (from PartialRoom) | Room model | |
| Modelica.Blocks.Sources.Constant | qConGai_flow (from PartialRoom) | Convective heat gain | |
| Modelica.Blocks.Sources.Constant | qRadGai_flow (from PartialRoom) | Radiative heat gain | |
| Modelica.Blocks.Routing.Multiplex3 | multiplex3_1 (from PartialRoom) | ||
| Modelica.Blocks.Sources.Constant | qLatGai_flow (from PartialRoom) | Latent heat gain | |
| Buildings.BoundaryConditions.WeatherData.ReaderTMY3 | weaDat (from PartialRoom) | ||
| Buildings.HeatTransfer.Sources.FixedTemperature | TWesWal | Boundary condition for the west wall | |
| HeatTransfer.Sources.FixedTemperature | TEasWal | Temperature of the east wall |
Revisions
-
January 12, 2019, by Michael Wetter:
Removed wrong use ofeach. -
July 7, 2015 by Michael Wetter:
Removed model for prescribed heat flow boundary condition as the value was zero and hence the model is not needed. This is for issue 439. -
December 31, 2013, by Wangda Zuo:
First implementation.