Modeling Turbulence in Permeable Media: The Double-Decomposition Concept Revisited

Abstract

In this article, a concept named double decomposition, which is used to model turbulent flows in porous media, is examined. This concept is based on the idea that in a turbulent flow through a porous matrix, local instantaneous variables can be averaged in time and space, simultaneously. Depending on how these operators are applied, averaged equations take different forms. In this article, instantaneous local equations are averaged using both operators and a different set of equations resulting from such operations are commented upon. Additional terms proposed for the averaged equations are discussed.

Keywords

• turbulent flow
• modeling
• double decomposition
• permeable structures
• porous media