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Numerical solution of the homogeneous Neumann boundary value problem on domains with a thin layer of random thickness

Dambrine, Marc and Greff, Isabelle and Harbrecht, Helmut and Puig, Benedicte. (2017) Numerical solution of the homogeneous Neumann boundary value problem on domains with a thin layer of random thickness. Journal of Computational Physics, 330. pp. 943-959.

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Abstract

The present article is dedicated to the numerical solution of homogeneous Neumann boundary value problems on domains with a thin layer of different conductivity and of random thickness. By changing the boundary condition, the boundary value problem given on the random domain can be transformed into a boundary value problem on a fixed domain. The randomness is then contained in the coefficients of the new boundary condition. This thin coating can be expressed by a random Ventcell boundary condition and yields a second order accurate solution in the scale parameter  ε of the layer's thickness. With the help of the Karhunen-Loeve expansion, we transform this random boundary value problem into a deterministic, parametric one with a possibly high-dimensional parameter y. Based on the decay of the random fluctuations of the layer's thickness, we prove rates of decay of the derivatives of the random solution with respect to this parameter y which are robust in the scale parameter  ε . Numerical results validate our theoretical findings.
Faculties and Departments:05 Faculty of Science > Departement Mathematik und Informatik > Mathematik > Computational Mathematics (Harbrecht)
UniBasel Contributors:Harbrecht, Helmut
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Elsevier
ISSN:0021-9991
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
Identification Number:
Last Modified:21 Aug 2017 14:56
Deposited On:21 Aug 2017 14:43

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