这是一个在空气自然对流中求发热体(被很薄隔热层包围)温度分布的例子,请看下面的命令流。
问题:1、发热体与空气之间的隔热层的网格如何进一步细化?
2、怎样求得更精确的解?
请各位大虾对分析过程和结果予以评价。
fini
/clear
/units,si
/COM, FLOTRAN CFD
/PREP7
ET,1,FLUID141
MPTEMP,1,0
MPDATA,KXX,2,,398
MPTEMP,1,0
MPDATA,VISC,2,,200
MPTEMP,1,0
MPDATA,KXX,3,,0.276
MPTEMP,1,0
MPDATA,VISC,3,,200
RECTNG,0,0.4005,0,0.915,
RECTNG,0.19,0.2305,0,0.915,
RECTNG,0.2,0.2205,0,0.915,
RECTNG,0,0.4005,0.19,0.725,
RECTNG,0,0.4005,0.2105,0.7,
AOVLAP,ALL
LESIZE,ALL,0.01, , , , , , ,1
ALLSEL,ALL
FLST,5,16,5,ORDE,16
FITEM,5,6
FITEM,5,7
FITEM,5,8
FITEM,5,9
FITEM,5,10
FITEM,5,11
FITEM,5,12
FITEM,5,13
FITEM,5,14
FITEM,5,15
FITEM,5,16
FITEM,5,17
FITEM,5,18
FITEM,5,19
FITEM,5,20
FITEM,5,21
ASEL,S, , ,P51X
APLOT
AMESH,ALL
mat,2
ALLSEL,ALL
FLST,5,1,5,ORDE,1
FITEM,5,30
ASEL,S, , ,P51X
APLOT
AMESH,ALL
mat,3
FLST,5,8,5,ORDE,8
FITEM,5,22
FITEM,5,23
FITEM,5,24
FITEM,5,25
FITEM,5,26
FITEM,5,27
FITEM,5,28
FITEM,5,29
ASEL,S, , ,P51X
APLOT
AMESH,ALL
NSEL,S,EXT
NPLOT
D,ALL, ,20, , , ,TEMP, , , , ,
D,ALL,VX,0
D,ALL,VY,0
ALLSEL,ALL
APLOT
FLDATA1,SOLU,TEMP,1
FLDATA2,ITER,EXEC,1500,
FLDATA2,ITER,OVER,100,
FLDATA2,ITER,APPE,100,
FLDATA3,TERM,PRES,0.01,
FLDATA3,TERM,TEMP,0.01,
FLDATA13,VARY,DENS,1
FLDATA7,PROT,DENS,AIR-SI
FLDATA7,PROT,VISC,AIR-SI
FLDATA7,PROT,COND,AIR-SI
FLDATA7,PROT,SPHT,AIR-SI
ACEL,0,9.81,0,
FLDATA26,STAB,MOME,1e-7,
FLDATA26,STAB,PRES,9e-5,
FLDATA26,STAB,TEMP,1e-4,
FLDATA34,MIR,MOME,0.6,
FLDATA34,MIR,TEMP,1,
FLDATA34,MIR,TURB,1,
FLDATA25,RELX,PRES,0.1,
FLDATA31,CAPP,TEMP,1
FLDATA31,CAPP,TMIN,20,
FLDATA31,CAPP,TMAX,1e+020,
FLST,2,1,5,ORDE,1
FITEM,2,30
BFA,P51X,HGEN,49953
FINISH
/SOL
SOLVE
FINISH
/PREP7
FLDATA1,SOLU,TURB,1
/SOL
SOLVE
FINISH |