Modeling Well Hydrodynamics
Publication: Journal of Hydraulic Engineering
Volume 124, Issue 12
Abstract
One of the limiting factors in determining design discharge for water wells is the entrance velocity into the well screen. Most of the well designs assume uniform flow along the well screen and do not consider the complex flow either along the screens or in the well proper. Several investigators have shown that the flow into well screens may be highly nonuniform, and designs based on uniform flow may be improper. Moreover, the traditional well design locates the pump intake above the well screen, which may maximize the nonuniformity of screen entrance velocity. This investigation proposes a finite-difference model that determines the fluid flows into, around, and in the well screen. Results show that locating the pump intake between 30 and 45% down from the screen top minimizes the differential entrance velocity and total drawdown.
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Copyright © 1998 American Society of Civil Engineers.
History
Published online: Dec 1, 1998
Published in print: Dec 1998
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