这是我所做的一个流-固-热的分析,但做完感觉结果明显不对,在整个空间中,上面部分流体的边界条件为80度,而下面部分流体的边界条件为50度,固体的初始温度为25度,而计算完,固体以及附近的温度均为3度左右,这是为何呀,是不是我的边界条件加的不对呀,我考虑为自然对流,希望高手赐教。
BATCH
/COM,ANSYS RELEASE 5.7 UP20001208 13:17:35 11/04/2004
/input,menust,tmp ,'',,,,,,,,,,,,,,,,1
/GRA,POWER
/GST,ON
/PLO,INFO,3
/COL,PBAK,ON,1,BLUE
/prep7
toffst,273
/units,si
et,1,141
eshape,0,2d
rectng,-20,20,-20,20
rectng,-20,20,20,23
rectng,-20,20,23,43
nummrg,all
numcmp,all
lsel,s,,,3,9,3
lsel,a,,,1
lesize,all,,,30
lsel,s,,,2,4,2
lesize,all,,,8,-3.0
lsel,s,,,5,7,2
lesize,all,,,8,1.0
lsel,s,,,8,10,2
lesize,all,,,20,-3.0
mat,1
amesh,1
amesh,3
mat,2
amesh,2
lsel,s,,,2,4,2
lsel,a,,,5,7,2
lsel,a,,,8,10,2
lsel,a,,,1,9,8
nsll,s,1
d,all,vx,0
d,all,vy,0
lsel,s,,,1
d,all,temp,50
/NOPR
*DEL,_PA1
*DIM,_PA1,ARRAY,10,1,1
*DO,_I,1,10
_PA1(_I) = 0.0
*ENDDO
SFLDELE,ALL,ALL
BFLDELE,ALL,ALL
DLDELE,ALL,ALL
LSCLEAR,ALL
/REPLOT
/prep7
lsel,s,,,2,4,2
lsel,a,,,5,7,2
lsel,a,,,8,10,2
lsel,a,,,1,9,8
nsll,s,1
d,all,vx,0
d,all,vy,0
lsel,s,,,1
nsll,s,1
d,all,temp,50
lsel,s,,,9
nsll,s,1
d,all,temp,80
allsel
mp,dens,2,8950
mp,kxx,2,398
mp,c,2,382
FINISH
/solu
allsel
flda,iter,exec,200
flda,prot,dens,air-ai
flda,prot,visc,air-ai
flda,prot,dens,air-si
flda,prot,visc,air-si
flda,prot,cond,air-si
flda,prot,spht,air-si
flda,vary,dens,t
SAVE
lsel,s,loc,x,-20,20,1
lsel,s,loc,y,20,23,1
nsll,s,1
ic,all,temp,25
allsel
flda,solu,temp,t
allsel
solve |