版主,你好!
我现在考虑是把上平面同时加载对流载荷和热流密度;在另外三个面上加载对流载荷,用到了表面热效应单元,请你看看这样对吗?
!假设硅对激光的吸收率为0.9,激光照射直径为150μm
fini
/clear
/prep7
et,1,solid90
et,2,surf152 !定义表面效应单元
blc4,0,0,1.5e-3,0.04e-3,0.2e-3 !建立硅片模型长1.5mm,宽200μm,厚度40μm
mp,kxx,1,140 !定义硅片的导热系数
!mp,dens,1,2230 !定义硅片的密度
KEYOPT,2,3,0
KEYOPT,2,4,1
KEYOPT,2,5,0
KEYOPT,2,6,0
KEYOPT,2,7,0
KEYOPT,2,8,3 !根据表面温度计算对流系数
KEYOPT,2,9,0
!R,1
!R,2
lsel,s,,,2,4,2
lsel,a,,,5,7,2
lesize,all,,,100
lsel,s,,,9,12,3
lsel,a,,,10,11,1
lesize,all,,,20
lsel,s,,,3,6,3
lsel,a,,,1,8,7
lesize,all,,,4
type,1
vmesh,all
asel,s,,,4
nsla,s,1
type,2
esurf,all
alls
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/solu
!toffst,300
!ic,all,temp,298
asel,s,,,1,3,1
nsla,s,0
sf,all,conv,10,25 !其它三个面定义对流系数,alls
esel,s,type,,2
nsle,s
sf,all,conv,12.5,25 !上平面施加对流载荷
!alls
!施加一个直径为150μm的激光均匀热流密度
esel,s,type,,1
nsle,s
nsel,r,loc,x,0.6e-3,0.75e-3
nsel,r,loc,y,0.04e-3
nsel,r,loc,z,0.025e-3,0.175e-3
sf,all,hflux, 88108 !施加均匀热流密度
alls
solv
fini
/post1
plnsol,TEMP
prnsol,TEMP
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