This document details on the steps that the author has followed to try to incorporate turbulent ingress head losses with the Darcian flow head loss through porous media in a horizontal landfill gas well to produce a model for calculating the head loss characteristics across the gas well for efficient extraction of landfill gas[2]. The horizontal well is a pipe with equidistant apertures penetrating the length of a landfill, with a vacuum inducing pump at the outlet and the far end blocked. The well is supported by a thin lamina of gravel and drains a cylindrical volume of gas generating medium around it. In [2], a quasi-1D model for this system was developed and implemented in MATLAB/Octave, but a computational study in COMSOL [1] has shown that the quasi-1D construction overlooks the highly localized turbulent structures at the ingress apertures. The purpose of the current project was to attempt to incorporate these local head losses into the quasi-1D model.
