ansys中,施加热边界问题
问一下,在施加热对流边界条件时,需要知道体的温度和散热系数,请问一下,
体的温度不知道是不是可以不用写入
sfa,area,conve,散热系数,体温度
体温度不用写可以吗 ?
还有谁知道铝合金7075的散热系数
谢谢 体没有对流吧?SFA的命令:Specifies surface loads on the selected areas
Table 2.10Load Commands for a Thermal Analysis
Load Type Solid or FE Model Entity Apply Delete List Operate Settings
Temperature Solid Model Keypoints DK DKDELE DKLIST DTRAN -
" Finite Element Nodes D DDELE DLIST DSCALE DCUM, TUNIF
Heat Flow Rate Solid Model Keypoints FK FKDELE FKLIST FTRAN -
" Finite Element Nodes F FDELE FLIST FSCALE FCUM
Convection, Heat Flux Solid Model Lines SFL SFLDELE SFLLIST SFTRAN SFGRAD
" Solid Model Areas SFA SFADELE SFALIST SFTRAN SFGRAD
" Finite Element Nodes SF SFDELE SFLIST SFSCALE SFGRAD, SFCUM
" Finite Element Elements SFE SFEDELE SFELIST SFSCALE SFBEAM, SFCUM, SFFUN, SFGRAD
Heat Generation Rate Solid Model Keypoints BFK BFKDELE BFKLIST BFTRAN -
" Solid Model Lines BFL BFLDELE BFLLIST BFTRAN -
" Solid Model Areas BFA BFADELE BFALIST BFTRAN -
" Solid Model Volumes BFV BFVDELE BFVLIST BFTRAN -
" Finite Element Nodes BF BFDELE BFLIST BFSCALE BFCUM
" " Elements BFE BFEDELE BFELIST BFSCALE BFCUM
你看。我对体施加温度载荷的方法是选择其中所有节点,用D施加温度,对于对流,应该是面的,选中其面,施加对流即可。温度是外表空气或液体的温度,应该不是体温度吧? 赞同楼上的对于对流,应该是面的
谢谢
谢谢楼上,非常感谢ansys在求解结构问题是出现的知名错误
我是利用生死单元来杀死45号单元,模型中单元总数120*2*140在出现的错误如下:
*** FATAL *** CP = 187.969 TIME= 14:46:50
Element information missing for element 1.
************************************************************************
The above error is non-recoverable by ANSYS
ANSYS run terminated by the indicated error
Current data base saved if possible.
************************************************************************
还有一个:不知道是什么原因
*** WARNING *** CP = 184.422 TIME= 14:46:40
Out of the 33840 defined elements, only 2 elements are selected.
请大侠帮忙
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