<abstract><p>This paper addresses the low Mach number limit for two-dimensional Navier–Stokes–Korteweg systems. The primary purpose is to investigate relevance of capillarity tensor analysis. For sake a concise exposition, our considerations focus on case quantum Navier-Stokes (QNS) equations. An outline subsequent generalization general viscosity and tensors provided. Our main resu...

We present hydrodynamical calculations of radiative shocks with low Mach numbers and find that the well-known global overstability can occur if the temperature exponent (α) of the cooling is sufficiently negative. We find that the stability of radiative shocks increases with decreasing Mach number, with the result that M = 2 shocks require α ∼ < −1.2 in order to be overstable. Such values occur...

The sound generated by a vortex moving across a duct section lined with porous materials and the corresponding vortex dynamics are studied numerically in the present investigation. The combined effects of the effective fluid density, the flow resistance, the length, and the thickness of the porous linings on the vortex dynamics and sound generation are examined in detail. Results show that stro...

The paper applies a wavelet filtering method based on the recursive denoising algorithm to airfoil noise in low-Mach number flows. pressure field around is decomposed into coherent contributions corresponding denoised and incoherent background noise. data are obtained from Large-Eddy Simulations. Both flow acoustic solvers validated against experimental at zero angle of attack, Reynolds numbers...