Define external thermal conditions in an AEC model.
Transcript
00:03
To prepare for running an AEC simulation in Autodesk CFD, you must first specify the physical characteristics of the model.
00:12
This includes defining boundary conditions, such as external thermal conditions.
00:18
In this example, a boundary condition is assigned to nine exterior surfaces of an office model using an applied U value,
00:26
also known as a film coefficient or convection condition.
00:30
Begin by selecting Boundary Conditions on the Setup tab of the ribbon.
00:35
Left-click the roof surface to select it.
00:38
Next, left-click to select the eight exterior and interior surfaces of the four walls.
00:44
To rotate the model and access the surfaces on the other side, press SHIFT and the middle mouse button, while moving the mouse.
00:52
You should have nine surfaces selected.
00:54
On the Setup tab of the ribbon, in the Boundary Conditions context panel, click Edit.
01:01
In the Boundary Conditions quick edit dialog, expand the Type drop-down and select Film Coefficient,
01:07
the equivalent of a U-value, near the bottom of the list.
01:11
Next, set the Coefficient Units to BTU/ft2/h/R and enter a Film Coefficient of 3.5.
01:20
Verify that the Temperature Units are set to Fahrenheit.
01:25
Then, enter a Ref Temperature of 85.
01:28
Click Apply.
01:30
To verify that the boundary condition is correctly applied to the exterior surfaces,
01:35
in the Design Study bar, ensure that the Film Coefficient condition appears with values of 3.5 BTU/ft2/h/R and 85 Fahrenheit.
01:47
Also, in the graphics window, ensure that the color of the stripes on the exterior surfaces corresponds to the legend.
01:54
With the exterior thermal boundary conditions properly set, the next step is to configure the heat generated by an occupant.
00:03
To prepare for running an AEC simulation in Autodesk CFD, you must first specify the physical characteristics of the model.
00:12
This includes defining boundary conditions, such as external thermal conditions.
00:18
In this example, a boundary condition is assigned to nine exterior surfaces of an office model using an applied U value,
00:26
also known as a film coefficient or convection condition.
00:30
Begin by selecting Boundary Conditions on the Setup tab of the ribbon.
00:35
Left-click the roof surface to select it.
00:38
Next, left-click to select the eight exterior and interior surfaces of the four walls.
00:44
To rotate the model and access the surfaces on the other side, press SHIFT and the middle mouse button, while moving the mouse.
00:52
You should have nine surfaces selected.
00:54
On the Setup tab of the ribbon, in the Boundary Conditions context panel, click Edit.
01:01
In the Boundary Conditions quick edit dialog, expand the Type drop-down and select Film Coefficient,
01:07
the equivalent of a U-value, near the bottom of the list.
01:11
Next, set the Coefficient Units to BTU/ft2/h/R and enter a Film Coefficient of 3.5.
01:20
Verify that the Temperature Units are set to Fahrenheit.
01:25
Then, enter a Ref Temperature of 85.
01:28
Click Apply.
01:30
To verify that the boundary condition is correctly applied to the exterior surfaces,
01:35
in the Design Study bar, ensure that the Film Coefficient condition appears with values of 3.5 BTU/ft2/h/R and 85 Fahrenheit.
01:47
Also, in the graphics window, ensure that the color of the stripes on the exterior surfaces corresponds to the legend.
01:54
With the exterior thermal boundary conditions properly set, the next step is to configure the heat generated by an occupant.
