Compound waves in a higher order nonlinear model of thermoviscous fluids

Anders Rønne Rasmussen, Mads Peter Sørensen, Yuri B. Gaididei, Peter Leth Christiansen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A generalized traveling wave ansatz is used to investigate compound shock waves in a higher order nonlinear model of a thermoviscous fluid. The fluid velocity potential is written as a traveling wave plus a linear function of space and time. The latter offers the possibility of predicting the outcome of interacting shock waves, i.e. shock jump heights and wave velocities after collisions and overtakes. The stability of the linear solution part is investigated and a criterion for its stability is determined. For a number of instances, the numerical results show formation of rarefaction waves. By using a similarity transformation, analytical expressions for these rarefaction waves are found in the limit of no dissipation. Examples of compound shock waves are illustrated by numerical simulations.
Original languageEnglish
JournalMathematics and Computers in Simulation
Volume127
Pages (from-to)236-251
Number of pages16
ISSN0378-4754
DOIs
Publication statusPublished - 2016

Keywords

  • Shock waves
  • Traveling fronts
  • Thermoviscous fluids
  • Shock interactions

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