表面效应单元surf52同时加对流和热流密度时,建立有无附加节点的表面效应单元有什么区别?建立附加节点时,把对流加在表面效应单元上,热流密度加载本来的表面上,或者是不建立附加节点时,把热流密度加在表面效应单元上,对流加在本来的表面上,理论上这两者应该没什么区别,但是计算结果却不同,这是什么原因呢?请大神指点~~
有附加节点命令流:
FINISH/CLEAR /PREP7ET,1,SOLID70 ET,2,SURF152,,,,1,1 KEYOPT,2,8,4 ! 对流选项KEYOPT,2,9,0 ! 无辐射
R1=1.213E-2L=0.01
MP,KXX,1,80 !定义钢芯导热系数 CYLIND,R1,,0,L,0,90TYPE,1ESIZE,0.001 !定义单元划分尺寸VMESH,ALL
TYPE,2 !建立表面效应单元N,10000,1.213E-2,1.213E-2,0.005ASEL,S,AREA,,3NSLA,S,1ESLN,S,0ESURF,10000ALLSEL,ALLFINISH
/SOLUSOLCONTROL,0ANTYPE,STATIC ! 稳态分析ALLSEL,ALLT_AMB = 20H= 10
D,10000,TEMP,T_AMB ! 指定对流环境温度ESEL,S,TYPE,,2SFE,ALL,,CONV,,HSFE,ALL,,CONV,2,T_AMB
ALLSEL,ALLASEL,S,AREA,,3NSLA,S,1ESLN,SESEL,R,TYPE,,1SFE,ALL,6,HFLUX,,450
ALLSEL,ALLTOFFST,273SOLVEFINISH
/POST1SET,LAST
无附加节点命令流:FINISH/CLEAR /PREP7ET,1,SOLID70 ET,2,SURF152,,,,1,0 KEYOPT,2,8,4 KEYOPT,2,9,0
R1=1.213E-2L=0.01T_AMB = 20H= 10
MP,KXX,1,80 !定义钢芯导热系数 CYLIND,R1,,0,L,0,90TYPE,1ESIZE,0.001 !定义单元划分尺寸VMESH,ALL
TYPE,2ASEL,S,AREA,,3NSLA,S,1ESURF
ESEL,S,TYPE,,2SFE,ALL,,HFLUX,,450 !加热流密度
ALLSEL,ALLASEL,S,AREA,,3NSLA,S,1ESLN,SESEL,R,TYPE,,1SFE,ALL,,CONV,,HSFE,ALL,,CONV,2,T_AMB ALLSEL,ALLFINISH
/SOLUALLSEL,ALLANTYPE,STATIC !稳态分析 TOFFST,273 !温度偏移量TIME,1SOLVE !求解FINISH/POST1SET,LAST
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