Test Compare. 2D cavity flow 幾何示意圖 長 寬: 1m*1m 格 點 : 64*64 ; 32*32 ; 16*16 LBM...
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Transcript of Test Compare. 2D cavity flow 幾何示意圖 長 寬: 1m*1m 格 點 : 64*64 ; 32*32 ; 16*16 LBM...
2D cavity flow幾何示意圖
長 寬: 1m*1m
格 點 : 64*64 ; 32*32 ; 16*16
LBM scheme
Re=1000
Case1 : IB-method
Case2 : 1st-Bounce-back method
Case3 : 2nd-Bounce-back method
The L2-norm errors of IB, 1st BB, and 2nd BB
Err(u) 1/50 Ratio 1/100 Ratio 1/200
IB6.85*10-3 2.49 2.75*10-3 3.41 8.06*10-4
1st BB6.31*10-3 1.71 3.69*10-3 0.58 6.35*10-3
2nd BB8.412*10-3 0.95 8.783*10-3 1.4 6.23*10-3
02 /)()( UUuLuErr E
邊界條件
0.1U
3
0.0001
1ey)cos(4x)cos(4U-0.25p
y)ex)cos(2-Usin(2v
y)ex)sin(2-Ucos(2u
Re
)t(16-2
Re
)t(8-
Re
)t-(8
2
2
2