Two Dimensional Subsonic and Subsonic-Sonic Spiral Flows Outside a Porous Body

In this paper, we investigate two dimensional subsonic and subsonic-sonic spiral flows outside a porous body. The existence uniqueness of the flow are obtained via variational formulation, which tends to given radially symmetric at far field. optimal decay rate field is also derived by Kelvin’s transformation some elliptic estimates. By extracting solutions as approximate sequences, obtain limit solution utilizing compensated compactness. main ingredients our analysis methods calculus variations, theory second-order quasilinear equations compactness framework.