Which consequence results when simplified Navier-Stokes equations omit the viscosity via boundary layer approximations for an airfoil?

💡 Explanation

Underestimating induced drag occurs because neglecting viscosity in the Navier-Stokes equations simplifies the analysis, assuming inviscid flow characterized by the Euler equations. This simplification omits skin friction; therefore it reduces the calculated total drag and especially induced drag, rather than correctly estimating it.

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