On the generalized Buckley-Leverett equation
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© American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in (J. Math. Phys. 57, 041501 (2016); and may be found at https://doi.org/10.1063/1.4945786.
J. Math. Phys. 57, 041501 (2016)
American Institute of Physics
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In this paper we study the generalized Buckley-Leverett equation with nonlocal regularizing terms. One of these regularizing terms is diffusive, while the other one is conservative. We prove that if the regularizing terms have order higher than one (combined), there exists a global strong solution for arbitrarily large initial data. In the case where the regularizing terms have combined order one, we prove the globalexistenceofsolutionundersomesizerestrictionfortheinitialdata.Moreover, in the case where the conservative regularizing term vanishes, regardless of the order of the diffusion and under a certain hypothesis on the initial data, we also prove the global existence of a strong solution, and we obtain some new entropy balances. Finally, we provide numerics suggesting that, if the order of the diffusion is 0 < ? < 1, a finite time blow up of the solution is possible.
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