3218559 3370177 mtina@grf.bg.ac.rs

FROM FLUID PARTICLE TO BULK FLOW: MACROSCOPIC DESCRIPTION OF TURBULENT OPEN CHANNEL FLOW AND FLOW WITHIN AN UNDERLYING POROUS MEDIUM

Autor: Dubravka POKRAJAC

ABSTRACT
This paper presents a macroscopic description of turbulent open channel flow above and within a rough permeable bed. The flow domain consists of two regions: the stream region above the bed, which contains only water, and a porous medium region within the bed, which contains both water and grains. The two regions are separated by a macroscopic boundary. The macroscopic description contains the double-averaged Navier- Stokes equations valid within the stream and within the porous medium, as well as the conditions for macroscopic flow variables at the interface between the two regions.

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