fluent处理

a. 查看是否有温度梯度和速度梯度，没有需要在fluent console 输入命令solve/set/expert/keep tempo-rary solver memory from being freed?yes

b. 打开场函数面板，根据协同角公式设置场函数

具体结果如下:

'(((name custom-function-3) (display "180 / pi * acos (abs (Vx * recon-dt-dx recon-dt-dy * Vy Vz * recon-dt-dz) / |V| / sqrt (recon-dt-dx * recon-dt-dx recon-dt-dy * recon-dt-dy recon-dt-dz * recon-dt-dz))") (syntax-tree ("*" 57.29564553093965 ("acos" ("/" ("/" ("abs" (" " (" " ("*" "x-velocity" "recon-dt-dx") ("*" "recon-dt-dy" "y-velocity")) ("*" "z-velocity" "recon-dt-dz"))) "velocity-magnitude") ("sqrt" (" " (" " ("*" "recon-dt-dx" "recon-dt-dx") ("*" "recon-dt-dy" "recon-dt-dy")) ("*" "recon-dt-dz" "recon-dt-dz"))))))) (code (field-* 57.29564553093965 (field-acos (field-/ (field-/ (field-abs (field- (field- (field-* (field-load "x-velocity") (field-load "recon-dt-dx")) (field-* (field-load "recon-dt-dy") (field-load "y-velocity"))) (field-* (field-load "z-velocity") (field-load "recon-dt-dz")))) (field-load "velocity-magnitude")) (field-sqrt (field- (field- (field-* (field-load "recon-dt-dx") (field-load "recon-dt-dx")) (field-* (field-load "recon-dt-dy") (field-load "recon-dt-dy"))) (field-* (field-load "recon-dt-dz") (field-load "recon-dt-dz")))))))))

))

注意：2D轴对称模型不适用

2. tecplot处理

file/load data file/xx.cas and xx.dat

Data/alter/specify equations

点击左图Data Set Info出现有图，其中Variable（s）是变量，1-11对应个变量的序号，用V 序号获取对应变量的数据，即V10表示计算域的temperature

协同角表达式如下，EQUATION = 'V81=180/PI*ACOS(ABS(V7*ddx(V15) V9*ddy(V15) V11*ddz(V15))/(SQRT(V7*V7 V9*V9 V11*V11)*SQRT(ddx(V15)*ddx(V15) ddy(V15)*ddy(V15) ddz(V15)*ddz(V15)) 0.000001))'
式中V7,V8等是变量对应的编号，可从tecplot查看，是每一个变量的编号。

随后通过Analyze/Calculate Variables计算输入表达式，随后可以通过contour 现实协同角的具体分布

协同角后处理