Problem Setup
DPW6 Case2
$$ C_L=0.5\pm0.0001 $$Mesh series: from DPW6-Boeing
WB configuraion, AE2.75
Meshes:
| Name | Size (num cell) | Note |
|---|---|---|
| WB T | 20657615 | |
| WB C | 26271819 | |
| WB M | 33683206 | Has 1 Pyramid distorted (negative jacobian) |
| WB F | 43126748 |
SA-rot
Use O2 (Green Gauss) / O4 (VFV HQM-OPT HQM-SD isotropic-base isotropic-functional)
Results
Gridfac:
$$ \text{GRIDFAC} = \left(\frac{N}{2\times10^7}\right)^{-k/3} $$where $k$ is order of accuracy in discretization.
When $\text{GRIDFAC}\rightarrow0$, solution approaches continuum. Use $\text{GRIDFAC}$ + linear regression to get the intercept drag coefficient.
Intercept CD
| Case Name | CD intercept vs NTF test (counts) | CD intercept vs NTF test (relative) |
|---|---|---|
| $P $ | 5.67 | \(2.3\%\) |
| $J $ | 7.91 | \(3.2\%\) |
| $K $ | 10.69 | \(4.3\%\) |
| $d $ | 6.49 | \(2.6\%\) |
| $\Pi $ | 9.37 | \(3.8\%\) |
| $\lambda $ | 5.99 | \(2.4\%\) |
| $\pi $ | 7.13 | \(2.9\%\) |
| $O2 $ | 12.59 | \(5.1\%\) |
| $O4 $ | 2.61 | \(1.0\%\) |
Worst CD
| Case Name | CD worst vs NTF test (counts) | CD worst vs NTF test (relative) |
|---|---|---|
| $P $ | 8.39 | \(3.4\%\) |
| $J $ | 13.57 | \(5.5\%\) |
| $K $ | 17.30 | \(7.0\%\) |
| $d $ | 13.52 | \(5.4\%\) |
| $\Pi $ | 16.52 | \(6.6\%\) |
| $\lambda $ | 11.12 | \(4.5\%\) |
| $\pi $ | 10.71 | \(4.3\%\) |
| $O2 $ | 24.00 | \(9.6\%\) |
| $O4 $ | 2.20 | \(0.9\%\) |