Analysis of multipolar vortices in the interaction of a shock with a strong moving vortex

• Published in: Computers & fluids Vol. 248; p. 105686
• Main Authors: Kundu, Abhishek, Biswas, Gautam
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15.11.2022
• Subjects: Compact scheme; CUSP; Euler equations; Multipolar vortices; Shock-vortex interaction; Vortex mach number; CUSP; Shock-vortex interaction; Vortex mach number; Compact scheme; Euler equations; Multipolar vortices
• ISSN: 0045-7930; 1879-0747
• DOI: 10.1016/j.compfluid.2022.105686

Numerical simulation results of a convecting shielded vortex interacting with a normal shock are presented. The shock and vortex Mach numbers covered are on the higher side, for which relatively little information is available. It is well known that for a weak shock the vortex survives the shock, and for stronger shocks it breaks down. We discover that there is a narrow zone of shock and vortex strengths for which the vortex neither preserves its shape, nor does it break down in the true sense, but generates a tripole or quadrupole — structures that have not so far been reported in shock-vortex interaction studies. A number of cases have been studied to determine the different shock-vortex interaction patterns depending on shock and vortex Mach numbers. A new type of interaction pattern has been determined and it has been named as Type-IV interaction. •Numerical simulation of a convecting shielded vortex interacting with a normal shock.•The compact scheme in the CUSP framework for computing high speed compressible flow.•Determination of shock-vortex interaction patterns depending on Mach numbers.•Emergence of multipolar vortices in strong shock-vortex interaction.•Understanding of the structure of the vortex deforms while passing through the shock.