ambient和global温度设置的差异

請問版上各位高手：
          在ambient attribute 裡面的temperature和global system setting 裡面的external ambient temperature有什麼不一樣，煩請各位大大解答，謝謝

其实这个问题前面已经有人解答过了，lz不妨去看看之前发的

剛看了之前的發帖"  system menue中的温度和Global中的温度？ "
還是看不懂：
想請問各位高手：Global指的是整體環境求解的溫度嗎?
                                那Ambient裡面的溫度又是定義哪個溫度呢?

我理解的是ambient定义的是求解域边界的温度，Global中定义的应该是求解域外面环境的温度

我记得在哪个里说这个问题的。
Ambient是环境的温度，也就是求解域外面的温度，算是边界条件，Global是求解域内设置的初始迭代温度，算是个初始条件，Global设多少都无所谓，但设置的接近最后计算出来的温度值可以使迭代步数减少，加快收敛~

你当杨坤唱歌无所谓啊^_^
还是有所谓的，Global中的温度有三个作用，计算浮升力的时候也用到这个参数。当Ambient设置和Global不一样的时候容易引起问题。
Ambient的优先级高于Global，我觉的这些温度的设置要结合求解域是否放大来一起考虑。要说的话，又是一大箩。举两个例子：自然对流放大求解域，那正确的设置Global就可以，Ambient不设也没关系。
不想放大求解域，但物体六个面的换热情况不一样，举例一个取款机，五个面在墙壁中，一个面在暴露在外，这时候就可以使用Ambient了，换热系数等可以设了。
另外，我觉的Global和Ambient里面的温度都是求解域外部的温度。
如有不正确的地方，也请大家指正！！！

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).)