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We consider a kinetic-fluid model with random initial inputs which describes disperse two-phase flows. In the light particle regime, using energy estimates, we prove the uniform regularity in the random space of the model for random initial data near the global equilibrium in some suitable Sobolev spaces, with the randomness in the initial particle distribution and fluid velocity. By hypocoercivity arguments, we prove that the energy decays exponentially in time, which means that the long time behavior of the solution is insensitive to such randomness in the initial data. Then we consider the generalized polynomial chaos stochastic Galerkin method (gPC-sG) for the same model. For initial data near the global equilibrium and smooth enough in the physical and random spaces, we prove that the gPC-sG method has spectral accuracy, uniformly in time and the Knudsen number, and the error decays exponentially in time.
Shu, Ruiwen 1 ; Jin, Shi 1
@article{M2AN_2018__52_5_1651_0,
author = {Shu, Ruiwen and Jin, Shi},
title = {Uniform regularity in the random space and spectral accuracy of the stochastic {Galerkin} method for a kinetic-fluid two-phase flow model with random initial inputs in the light particle regime},
journal = {ESAIM: Mathematical Modelling and Numerical Analysis },
pages = {1651--1678},
publisher = {EDP-Sciences},
volume = {52},
number = {5},
year = {2018},
doi = {10.1051/m2an/2018024},
zbl = {1414.35174},
mrnumber = {3878610},
language = {en},
url = {http://geodesic.mathdoc.fr/articles/10.1051/m2an/2018024/}
}
TY - JOUR AU - Shu, Ruiwen AU - Jin, Shi TI - Uniform regularity in the random space and spectral accuracy of the stochastic Galerkin method for a kinetic-fluid two-phase flow model with random initial inputs in the light particle regime JO - ESAIM: Mathematical Modelling and Numerical Analysis PY - 2018 SP - 1651 EP - 1678 VL - 52 IS - 5 PB - EDP-Sciences UR - http://geodesic.mathdoc.fr/articles/10.1051/m2an/2018024/ DO - 10.1051/m2an/2018024 LA - en ID - M2AN_2018__52_5_1651_0 ER -
%0 Journal Article %A Shu, Ruiwen %A Jin, Shi %T Uniform regularity in the random space and spectral accuracy of the stochastic Galerkin method for a kinetic-fluid two-phase flow model with random initial inputs in the light particle regime %J ESAIM: Mathematical Modelling and Numerical Analysis %D 2018 %P 1651-1678 %V 52 %N 5 %I EDP-Sciences %U http://geodesic.mathdoc.fr/articles/10.1051/m2an/2018024/ %R 10.1051/m2an/2018024 %G en %F M2AN_2018__52_5_1651_0
Shu, Ruiwen; Jin, Shi. Uniform regularity in the random space and spectral accuracy of the stochastic Galerkin method for a kinetic-fluid two-phase flow model with random initial inputs in the light particle regime. ESAIM: Mathematical Modelling and Numerical Analysis , Tome 52 (2018) no. 5, pp. 1651-1678. doi: 10.1051/m2an/2018024
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