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- W2521036045 abstract "We study non-inertial flows of single-phase yield stress fluids along uneven/rough-walled channels, e.g. approximating a fracture, with two main objectives. First, we re-examine the usual approaches to providing a (nonlinear) Darcy-type flow law and show that significant errors arise due to self-selection of the flowing region/fouling of the walls. This is a new type of non-Darcy effect not previously explored in depth. Second, we study the details of flow as the limiting pressure gradient is approached, deriving approximate expressions for the limiting pressure gradient valid over a range of different geometries. Our approach is computational, solving the two-dimensional Stokes problem along the fracture, then upscaling. The computations also reveal interesting features of the flow for more complex fracture geometries, providing hints about how to extend Darcy-type approaches effectively." @default.
- W2521036045 created "2016-09-23" @default.
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- W2521036045 date "2016-09-16" @default.
- W2521036045 modified "2023-10-13" @default.
- W2521036045 title "Non-Darcy effects in fracture flows of a yield stress fluid" @default.
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- W2521036045 doi "https://doi.org/10.1017/jfm.2016.491" @default.
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