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- 1970-1-1
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有一长方形金属板,板长15cm,宽1cm,中央为一半径为1cm的圆孔。板的初始温度为500℃,将其突然置于温度为20℃且对流换热系数为100W/m2.℃的流体介质中,试计算:第1秒及第50秒两个时刻金属板内的温度分布情况。
金属板的材料属性如下:
密度=5000Kg/m3
比热=200J/Kg.K
热传导率=5W/m.K
命令流:
/title,transient slab problem
/prep7
et,1,plane55
mp,dens,1,5000
mp,kxx,1,
mp,kxx,1,5
mp,c,1,200
rectng,0,0.15,0,0.05
cyl4,0.075,0.025,0.01
asba,1,2
esize,0.0025
amesh,3
finish
/solu
antype,trans
ic,all,temp,500
lplot
sfl,1,conv,100,,20
sfl,2,conv,100,,20
sfl,3,conv,100,,20
sfl,4,conv,100,,20
time,50
kbc,1
autots,on
deltim,1,0.1,2.5
timint,on
outres,all,all
solve
FINISH |
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