Abstract
The minimization of drag functional for the stationary, isothermal, compressible Navier-Stokes equations (N-S-E) in three spatial dimensions is considered. In order to establish the existence of an optimal shape the general result [26] on compactness of families of generalized solutions to N-S-E is applied. The family of generalized solutions to N-S-E is constructed over a family of admissible domains \( \mathcal{U}_{ad} \). Any admissible domain Ω = B\S contains an obstacle S, e.g., a wing profile. Compactness properties of the family of admissible domains are imposed. It turns out that we require the compactness of the family of admissible domains with respect to the Hausdorff metrics as well as in the sense of Kuratowski-Mosco. The analysis is performed for the range of adiabatic ratio γ > 1 in the pressure law p(ρ) = gr γ and it is based on the technique proposed in [24] for the discretized N-S-E.
This work was completed during a stay of the first author at the Institute Elie Cartan of the University Henri Poincaré Nancy I.
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Plotnikov, P.I., Sokolowski, J. (2007). Shape Optimization for Navier-Stokes Equations. In: Kunisch, K., Sprekels, J., Leugering, G., Tröltzsch, F. (eds) Control of Coupled Partial Differential Equations. International Series of Numerical Mathematics, vol 155. Birkhäuser, Basel. https://doi.org/10.1007/978-3-7643-7721-2_11
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