薄板传热的计算

ybg77

split后会产生一个后缀为back的part
计算中考虑辐射换热
计算后薄板上的温度分布结果在原part和back part上不一样
这是怎么回事？

我感觉好像两个part面分别是对应薄壁的两侧,
但对于薄的钣金件，两侧的温度应该差别不大的。


[ 本帖最后由 ybg77 于 2008-3-27 11:48 编辑 ]

ybg77

附上两张图，大家看看问题出在哪里啊！
谢谢了！

ybg77

弗萨多幅

Kiddosuper

請你用字繾詞注意一下!
Not sure about your model settings, you didn't make detailed description.
1.if you want to simulate CHT, please build the plate with thickness
2. How do you set up the plate?
     an interface wall? or what
     if it's a zero thickness wall, then I guess the "air" temperature is not same on both side of this plate.

[ 本帖最后由 Kiddosuper 于 2008-4-1 18:27 编辑 ]

ybg77

多谢总版主指点！！
帖子发了快一个星期，总是得不到解决，心急！

薄板是按照灯罩的例子建的无厚度壁面，是个int wall，然后劈成了两个part。

CHT是计算传热学的意思么？
我在算辐射换热，无厚度壁面受到热辐射后温度升高，又成为第二辐射源
但是计算结果外壁温度又很低，热辐射能力很弱，与实验不符，
我想，可能跟无厚度壁面是个绝热壁面有关吧？
难道必须要建成有厚度的两层壁面，把固体区域网格画进去算固体传热不成？

[ 本帖最后由 ybg77 于 2008-4-1 19:55 编辑 ]

Kiddosuper

1. CHT=conjugate heat transfer
2.coz you want to simulate the radiation effect, suggest that you should build the plate with thickness. Because the temperature gradient on plate will be smaller if you build it with thickness. (if it is zero thickness, then its temperature is the neighbored air temperature )
And the temperature distribution on this plate will have big influence on  the plate radiaton.
3. it is not difficult to build mesh for this plate with thickness, you can save more time on cfx-pre settings.