对一圆柱表面,用激光加热,建模建一截面,采用plane55轴对称,表面加一热流,边界考虑与空气的对流,对流系数为1,空气温度为25度,圆柱截面所有节点起始温度也为25度。如图,在y=0的线上加热流,即图中的上表面!温度分布如图所示,上面的温度不升,反降!大侠们慷慨些,指点下!谢谢!
finish
/clear
/filnam,tissue
/units,si
/prep7
et,1,plane55
keyopt,1,3,1
mp,kxx,1,0.2 !unit
mp,c,1,2e3
mp,dens,1,1.2e3
mp,kxx,2,0.45
mp,c,2,3.5e3
mp,dens,2,1.075e3
mp,kxx,3,0.486
mp,c,3,3.67e3
mp,dens,3,1.06e3
rectng,0,0.01,-5e-3,0
rectng,0,0.01,-0.01,-5e-3
rectng,0,0.01,-0.02,-0.01
aglue,all
numcmp,all
aesize,1,5e-4
mshkey,1
mshape,0,2d
mat,1
amesh,1
aesize,2,1e-3
mshkey,1
mshape,0,2d
mat,2
amesh,2
aesize,3,1e-3
mshkey,1
mshape,0,2d
mat,3
amesh,3
finish
/solu
h=0.3 !加热效率
r=5e-3 !高斯热源半径
pi=3.1415926
q=100
qmax=3*q/(pi*r*r)
size1=5e-4
max_x=21
*dim,laser,table,max_x,1,1,x,y,laser1
*do,i,1,max_x,1
laser(i,0,1)=(i-1)*size1
xx=(i-1)*size1
*if,laser(i,0,1),le,r,then
laser(i,1,1)=qmax*exp(-3*xx**2/r**2)
*else
laser(i,1,1)=0
*endif
*enddo
antype,trans
toffst,273
allsel,all
ic,all,temp,25
nsel,s,node,loc,y,0,0
sf,all,hflux,%laser%
lsel,s,line,loc,x,0.01,0.01
lsel,a,line,loc,y,-0.02,-0.02
sfl,all,conv,1,25
time,5
kbc,1
timint,on
deltime,2e-1,2e-1,8e-1
autots,on
outres,all,all
solve
finish
/post1 |