ansys中如何定义随温度变化的表面换热系数? 30
/prep7
et,1,solid70
mp,dens,1,5000
mp,c,1,500
mp,kxx,1,20
*dim,conve,table,5,1,1,temp
conve(0,1,1)=1
conve(1,0,1)=20
conve(1,1,1)=10
conve(2,0,1)=200
conve(2,1,1)=20
conve(3,0,1)=400
conve(3,1,1)=40
conve(4,0,1)=600
conve(4,1,1)=60
conve(5,0,1)=800
conve(5,1,1)=80
block,-1,1,-1,1,-1,1
esize,0.25
mat,1
vmesh,1
ic,all,temp,800
nsel,s,ext
sf,all,conv,%conve%,20
/solu
antype,4
trnopt,full
pred,on
solcontrol,on
nropt,full,,on
!cnvtol,u,,0.5
!cnvtol,f,,0.05
cutcontrol,plslimit,10,
!eqslv,sparse,,2
lnsrch,on
autots,on
tintp,,,,1,,
timint,on
kbc,1
nsubst,1
neqit,50
outres,all,all
t=0
*do,i,1,5
t=t+200
time,t
deltim,100,100,100
allsel,all
solve
*enddo
/post1
plnsol,temp
随意编程,通过*dim table 定义了随温度变化的对流换热系数。计算结果600到800℃之间的conv应该在60到80之间。但ansys查看Convect FilmCoef却是30+,请问有人知道是怎么回事吗?
微信图片_20180805175611.png