Sand production is a complex phenomenon caused by the erosion of borehole walls during extraction hydrocarbons. In this paper, sanding process in typical Thick-Walled Hollow Cylinder (TWHC) test numerically simulated. The main objective study to model particulate mechanism sand granular assemblies with different bonding conditions and examine effects parameters such as stress level cavity size ...

As a cylinder spins in an infinite media, viscous shear forces induce fluid motion and circular streamlines are generated. For Newtonian fluids, a simple analytical solution is possible and widely known. The hydrodynamics of nonNewtonian fluids, however, can be quite complex under such conditions. This paper investigates the behavior of a wide range of non-Newtonian fluids in the infinite cylin...

An analytical method is derived for the thermal consolidation of a saturated, porous, hollow cylinder with infinite length. The solutions in Laplace transform space are first obtained and then numerically inverted by Stehfest method. Two cases of boundary conditions are considered. First, variable thermal loadings are applied on the inner and outer pervious lateral surfaces of the hollow cylind...

We report a new periodic structure of the cylinder packing. All the cylinders are congruent and the length of the cylinders are infinite and their directions are restricted to only six directions of 〈110〉. Each cylinder is fixed by cylinders of other directions, so that the whole structure sustains mechanical stability. The packing density equals to