天阿............ 有看沒有懂
我在HELP裡面找到的跟樓上的大大不一樣.......
這是啥情形
Ambient Temperature and Inflows The temperature of the air that flows into the domain through an intake fan or vent, or across a free boundary is by default taken as the ambient temperature. For any individual fan or vent, it is possible to override this by setting a different intake temperature by locating a coincident cutout and applying a local ambient temperature using the Ambient Attribute Dialog. For a fixed flow, you need to attach an ambient in the construction dialog.
This use is illustrated below for an enclosure.
At an outflow (fan or vent), the air that leaves the enclosure leaves with a within-enclosure temperature calculated by the program. Therefore at outflows, the external ambient temperature has no affect whatsoever.
Ambient Temperature and Heat Flux through Walls
The `bulk' temperature of the fluid that is on the outside of external walls is, by default, taken as the ambient temperature. This external temperature is of course needed for the program to calculate the heat flux through the wall. The bulk temperature referred to is the fully-mixed air temperature some way away from the wall. (The temperature at the exterior surface of a wall differs from the bulk temperature and drives the heat flux by the temperature difference in accordance with the user-specified value of the external heat transfer coefficient (H).)
