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Force vector: (0.99980003 0.02094 0)
                                pressure        viscous          total       pressure        viscous          total
zone name                          force          force          force    coefficient    coefficient    coefficient
                                       n              n              n                                            
------------------------- -------------- -------------- -------------- -------------- -------------- --------------
airfoil                        3.8125084              0      3.8125084   0.0024897052              0   0.0024897052
------------------------- -------------- -------------- -------------- -------------- -------------- --------------
net                            3.8125084              0      3.8125084   0.0024897052              0   0.0024897052
 

This is an inviscid model, we are expecting a drag coefficient of zero, and yet there is a small drag coefficient that present. We should investigate more into this.

Cd =  (Cd)pressure + (Cd)skin friction

Before we can make any conclusion about the accuracy of our result, we should always make validation check. The most common validation step is grid convergence check.

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