Analysis of Non-local Multicontinuum Upscaling for Dual Continuum Model

TL;DR

This paper introduces a rigorous multiscale upscaling method for dual continuum models, effectively capturing non-local transfer and properties in subsurface formations through localized basis functions.

Contribution

The paper develops a novel multiscale upscaling technique that constructs localized basis functions for dual continuum models, improving accuracy in capturing non-local effects.

Findings

Method has coarse mesh dependent convergence.

Numerical examples demonstrate effective performance.

Basis functions have good approximation properties.

Abstract

In this paper, we develop and analyze a rigorous multiscale upscaling method for dual continuum model, which serves as a powerful tool in subsurface formation applications. Our proposed method is capable of identifying different continua and capturing non-local transfer and effective properties in the computational domain via constructing localized multiscale basis functions. The construction of the basis functions consists of solving local problems defined on oversampling computational region, subject to the energy minimizing constraints that the mean values of the local solution are zero in all continua except for the one targeted. The basis functions constructed are shown to have good approximation properties. It is shown that the method has a coarse mesh dependent convergence. We present some numerical examples to illustrate the performance of the proposed method.