作者DRmikeice (.人.)
看板Cad_Cae
标题[请益] 有关FEHT..
时间Wed May 20 23:11:45 2009
A straight rectangular fin of uniform cross section is fabricated from a
material of thermal conductivity k= 5W/m.K, thickness w = 20 mm, and length
L = 200 mm. The base of the fin is maintained at 200oC,and the convection
heat transfer coefficient is 500 W/m2.K with an ambient air temperature of
T∞= 25oC.
(1) Using the program to perform a two dimensional analysis on the fin, and
to determine the fin heat rate and the tip temperature.
(2) Display isotherms and discuss key features of the corresponding temperature
field and heat flow pattern.
(3) Compare your results with those from one‐dimensional analytical solution.
以上我的作业内容,很努力在做了..请鞭小力点ˊˋ
首先,物件的规格,好像只能画出2D?,厚度那个20mm不知道要怎麽处理= ="
我是先画出200mm的正方形,厚度先不理他...
画完节点之後,材料的决定也是问题..
Density 跟 Specific heat 这两个不知道要设定多少?!
我是暂时设定13跟2,不知道有没有什麽影响
边界条件的设定,假设图面左边为基底,温度设定200度,heat flux设为0
其余三面温度为25度,热对流系数为500..
这样的边界温度设定也不知道对不对~"~
接着是Internal Generation,我自己假设为0..
最後按F2有成功记算,view当中也可以看到温度场分布图跟一堆箭头那个图@@
但是上面自己假设太多条件,也不知道设定的对不对..
希望有高手能够指点指点..拜托了...
(有人看得懂我在讲什麽吗..这绝对不是滑齿龙语阿~泪奔)
--
│ ███ ▂▄▃
││││
│ ˋ ◤Mooncat~◥││││ 「为什麽
,
│ ‵ ◤ ◥▏*_▂▁ ▋
│││ 为什麽教授这麽鸡掰
│ ′ 、▌█
▊▉▏ │ 没天理啊
……
…」
◢ ◤◢
◣▋◢ █
▋▊ ▕▅▇
◥◥*Mooncat~
◢ ▂▇ˋ█▆◤
▂_ ▁▄▆▇▃ by bbxsky
--
※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 118.170.85.158