TY - JOUR

T1 - On finite time BV blow-up for the p-system

AU - Bressan, Alberto

AU - Chen, Geng

AU - Zhang, Qingtian

N1 - Funding Information:
The research of the first author was partially supported by NSF, with grant DMS-1411786: Hyperbolic Conservation Laws and Applications. The research of the second author was partially supported by NSF with grant DMS-1715012.
Publisher Copyright:
© 2018, © 2018 Taylor & Francis.

PY - 2018/8/3

Y1 - 2018/8/3

N2 - The paper studies the possible blowup of the total variation for entropy weak solutions of the p-system, modeling isentropic gas dynamics. It is assumed that the density remains uniformly positive, while the initial data can have arbitrarily large total variation (measured in terms of Riemann invariants). Two main results are proved. (I) If the total variation blows up in finite time, then the solution must contain an infinite number of large shocks in a neighborhood of some point in the t-x plane. (II) Piecewise smooth approximate solutions can be constructed whose total variation blows up in finite time. For these solutions the strength of waves emerging from each interaction is exact, while rarefaction waves satisfy the natural decay estimates stemming from the assumption of genuine nonlinearity.

AB - The paper studies the possible blowup of the total variation for entropy weak solutions of the p-system, modeling isentropic gas dynamics. It is assumed that the density remains uniformly positive, while the initial data can have arbitrarily large total variation (measured in terms of Riemann invariants). Two main results are proved. (I) If the total variation blows up in finite time, then the solution must contain an infinite number of large shocks in a neighborhood of some point in the t-x plane. (II) Piecewise smooth approximate solutions can be constructed whose total variation blows up in finite time. For these solutions the strength of waves emerging from each interaction is exact, while rarefaction waves satisfy the natural decay estimates stemming from the assumption of genuine nonlinearity.

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U2 - 10.1080/03605302.2018.1499115

DO - 10.1080/03605302.2018.1499115

M3 - Article

AN - SCOPUS:85061636612

SN - 0360-5302

VL - 43

SP - 1242

EP - 1280

JO - Communications in Partial Differential Equations

JF - Communications in Partial Differential Equations

IS - 8

ER -