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Lifting a large object from an anisotropic porous bed
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An analytical study of two dimensional problem of lifting an object from the top of a fully saturated rigid porous bed is discussed. It is assumed that the porous bed is anisotropic in nature. The flow within the gap region between the object and the porous bed is assumed to be governed by Stokes equation while the flow within the porous bed is governed by Brinkman equation. The breakout phenomenon for different kinds of soil is reported. The effect of mechanical properties like anisotropic permeability, grain diameter size, and porosity on streamlines, velocity, and force is analyzed. Relevant comparison with C. C. Mei, R. W. Yeung, and K. F. Liu [“Lifting a large object from a porous bed,” J. Fluid. Mech. 152, 203–215 (1985)] and Y. Chang, L. H. Huang and F. P. Y. Yang [“Two-dimensional lift-up problem for a rigid porous bed,” Phys. Fluids, 27, 053101 (2015)] is done.
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