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dc.contributor.authorMartínez Ruiz, Daniel
dc.contributor.authorHuete, Cesar
dc.contributor.authorMartínez Ferrer, Pedro J.
dc.contributor.authorMira Martinez, Daniel
dc.contributor.otherBarcelona Supercomputing Center
dc.identifier.citationMartínez Ruiz, D. [et al.]. Specific heat effects in two-dimensional shock refractions. "Shock Waves", 2021, vol. 31, p. 1-17.
dc.description.abstractCompressible mixtures in supersonic flows are subject to significant temperature changes via shock waves and expansions, which affect several properties of the flow. Besides the widely studied variable transport effects such as temperature-dependent viscosity and conductivity, vibrational and rotational molecular energy storage is also modified through the variation of the heat capacity cp and heat capacity ratio γ, especially in hypersonic flows. Changes in the composition of the mixture may also modify its value through the species mass fraction Yα, thereby affecting the compression capacity of the flow. Canonical configurations are studied here to explore their sharply conditioned mechanical equilibrium under variations of these thermal models. In particular, effects of cp(T,Yα) and γ(T,Yα) on the stability of shock-impinged supersonic shear and mixing layers are addressed, on condition that a shock wave is refracted. It is found that the limits defining regular structures are affected (usually broadened out) by the dependence of heat capacities with temperature. Theoretical and high-fidelity numerical simulations exhibit a good agreement in the prediction of regular shock reflections and their post-shock aerothermal properties.
dc.description.sponsorshipWork produced with the support of a 2019 Leonardo Grant for Researchers and Cultural Creators, BBVA Foundation and Project PID2019-108592RB-C41 and PID2019-108592RA-C43 (MICINN/ FEDER, UE). Numerical simulations were carried out on the MareNostrum 4 supercomputer with the Grant RES FI-2019-1-0046. The authors gratefully acknowledge Arnaud Mura, CNRS researcher at Institut PPRIME in France, for the numerical tool CREAMS.
dc.format.extent17 p.
dc.subjectÀrees temàtiques de la UPC::Informàtica::Aplicacions de la informàtica::Aplicacions informàtiques a la física i l‘enginyeria
dc.subject.lcshShock waves.
dc.subject.lcshVortex generators
dc.subject.otherShock waves
dc.subject.otherShear layers
dc.subject.otherSpecific heats
dc.subject.otherThermally perfect gas
dc.subject.otherHypersonic flow
dc.titleSpecific heat effects in two-dimensional shock refractions
dc.subject.lemacEnergia -- Models matemàtics
dc.description.peerreviewedPeer Reviewed
dc.rights.accessRestricted access - publisher's policy
dc.description.versionPostprint (author's final draft)
local.citation.publicationNameShock Waves

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