我用ansys提供的几种方法进行了分别求解并进行对照:
1、radiosity method
fini
/clear
/prep7
et,1,solid70
mp,kxx,1,49.8
mp,c,1,465
mp,dens,1,7840
mp,emis,1,1
rpr4,6,0,0,0.03,,0.3
esize,0.03,
type,1
mat,1
mshkey,0
mshape,1,3d
vmesh,1
sfa,all,,rdsf,1,1
/psf,rdsf,emis,3
/psf,rdsf,encl,3
/aux12
stef,5.67e-8
toffst,273
radopt,0.1,,0
spctmp,1,20
hemiopt,10
v2dopt,0
vfcalc,flo,vf
/solu
antype,trans
autots,on
tunif,800
kbc,1
deltim,25
outres,,all
outpr,nsol,last
time,1200
alls
solve
/post1
set,last
plnsol,temp
2、radiation matrix method
fini
/clear
/prep7
et,1,solid70
et,2,shell57
et,3,matrix50,1
mp,kxx,1,49.8
mp,c,1,465
mp,dens,1,7840
mp,emis,2,1
rpr4,6,0,0,0.03,,0.3
esize,0.03,
type,1
mat,1
mshkey,0
mshape,1,3d
vmesh,1
type,2
mat,2
asel,all
nsla,s,1
esurf
n,500,0,0,0.35
/aux12
esel,s,type,,2
nsle,s
nsel,a,node,,500
geom,0
emis,2,1
stef,5.67e-8
vtype,0
space,500
write,radm
alls
fini
/prep7
type,3
se,radm
esel,s,type,,2
edele,all
d,500,temp,20
fini
/solu
alls
antype,trans
toffst,273
tunif,800
autots,on
kbc,1
deltim,25
outres,,all
outpr,nsol,last
time,1200
solve
/post1
set,last
plnsol,temp
3、surf152 method
fini
/clear
/prep7
et,1,solid70
et,2,surf152,,,,1,1
keyopt,2,9,1
r,2,1,5.67e-8
mp,kxx,1,49.8
mp,c,1,465
mp,dens,1,7840
mp,emis,2,1
rpr4,6,0,0,0.03,,0.3
esize,0.03,
type,1
mat,1
mshkey,0
mshape,1,3d
vmesh,1
type,2
real,2
mat,2
n,500,0,0,0.35
esurf,500
finish
/solu
alls
antype,trans
toffst,273
d,500,temp,20
tunif,800
autots,on
kbc,1
deltim,25
outres,,all
outpr,nsol,last
time,1200
solve
/post1
set,last
plnsol,temp
三种方法的得到的温度场分布是一致的,温度场是对称的,两端低,中间高,最高温度均为310.34
那本书上的结果感觉应该是有问题的 |