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A one-dimensional i...
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Choquard, PhilippeEPFL, Lausanne
(författare)
A one-dimensional inviscid and compressible fluid in a harmonic potential well
- Artikel/kapitelEngelska2007
Förlag, utgivningsår, omfång ...
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2007-10-12
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Springer Science and Business Media LLC,2007
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:ltu-10892
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https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-10892URI
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https://doi.org/10.1007/s10440-007-9161-7DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
Anmärkningar
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Validerad; 2007; 20070925 (strom)
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A Hamiltonian model is analyzed for a one-dimensional inviscid compressible fluid. The space-time evolution of the fluid is governed by the following system of the Hamilton-Jacobi and the continuity equations: S-t + 1/2(S-x(2) + omega(2)chi(2)) =0, S(x, 0) = S-0(x); rho(t) + (rho S-x)(x) =0, rho(x, 0) =rho(0)(x).Here S and rho designate the velocity potencial and the mass density, respectively. Unless S-0 is convex, shocks form and the velocity S (x) becomes discontinuous in {0 < omega t < pi/2}. It is demonstrated that there nevertheless exists a unique viscosity-measure solution (S,rho) when S-0 is globally Lipschitz continuous and locally semi-concave while rho(0) is a finite Borel measure. The structure of the velocity and the density is exhibited. For initial data correlated in a certain sense, a class of classical solutions (S,rho) is given. Negative time is also considered, and illustrating examples are given.
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Strömberg, ThomasLuleå tekniska universitet,Matematiska vetenskaper(Swepub:ltu)strom
(författare)
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EPFL, LausanneMatematiska vetenskaper
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Acta Applicandae Mathematicae - An International Survey Journal on Applying Mathematics and Mathematical Applications: Springer Science and Business Media LLC99:2, s. 161-1830167-80191572-9036
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