Computational Rheology for Pipeline and Annular Flow by Wilson C. Chin PhD PDF

By Wilson C. Chin PhD

ISBN-10: 0884153207

ISBN-13: 9780884153207

Computational Rheology for Pipeline and Annular stream develops and applies sleek analytical and computational finite distinction equipment for fixing circulate difficulties in drilling and creation. It additionally offers useful insights into move coverage research in subsea pipeline layout. utilizing modeling suggestions that simulate the movement of non-Newtonian fluids, e.g., strength legislation, Bingham plastic, and Herschel-Bulkley flows, this booklet offers confirmed annular movement methodologies for cuttings delivery and glued pipe research in keeping with exact experimental info acquired from hugely deviated and horizontal wells. those equipment are utilized for hugely eccentric borehole geometries to the layout of pipeline bundles in subsea purposes, the place such annular configurations come up in speed and thermal modeling purposes.

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Once the solution is obtained, the results for x(r,s) and y(r,s) are used to generate the metric transformations needed to reformulate the physical equations for u in (r,s) coordinates. The flow problem is then solved in these rectangular computational coordinates using standard numerical methods. These new coordinates implicitly contain all the details of the input geometry, providing fine resolution in tight spaces as needed. To see why, we now describe briefly Eccentric, Nonrotating, Annular Flow 35 the boundary conditions used in the mapping.

But when the program requests modifications to the outer contour, we overwrite five of the bottom coordinates to simulate a flat cuttings bed. The bed height is half of the distance up the annular cross-section. 8 gal/min” obtained in Example 1 for the unblocked annulus. First, the program generates the grid in Figure 2-6a, which conforms to the top of the cuttings bed. 1861E-04 lbf secn /in2 . 3890E-02 psi/ft. Figure 2-6b shows that the maximum velocities at the bottom are less than onehalf of those at the top.

Once the solution is obtained, the results for x(r,s) and y(r,s) are used to generate the metric transformations needed to reformulate the physical equations for u in (r,s) coordinates. The flow problem is then solved in these rectangular computational coordinates using standard numerical methods. These new coordinates implicitly contain all the details of the input geometry, providing fine resolution in tight spaces as needed. To see why, we now describe briefly Eccentric, Nonrotating, Annular Flow 35 the boundary conditions used in the mapping.

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Computational Rheology for Pipeline and Annular Flow by Wilson C. Chin PhD


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