W artykule podano proste zależności umożliwiające interpretację danych ciśnieniowych początkowego okresu przypływu płynu złożowego do otworu z warstwy ze szczeliną poziomą, umożliwiające określenie przepuszczalności lub pola powierzchni szczeliny.
EN
Provided are relations which describe the early time flow pressure behavior in wells with horizontal fracture. Derived relations allows us to compute permeability or surface area of a horizontal fracture.
Surface generation mechanism by the burnishing action in machining has been examined experimentally under various velocity and load conditions. The surface generation characteristics are estimated by the surface improvement ratio ( the ratio of the deformed asperity heights and the original heights ) and the plastic flow pressure, Pm, based on the junction growth theory of Tabor (1959). Burnishing velocity in this study's region does not influence the friction coefficient (the ratio of burnishing load and friction force). The tip of asperity deformed plastically by burnishing action mainly flows in both sides of the asperity.
This paper presents a methodology based on the finite element method to simulate the flow of granular materials. Moreover, it allows proper estimation of dynamic pressure during silo discharge since this subject is still under discussion, especially for designing silos with an insert (an input element). A 2-D simulation of the discharge process of a cylindrical silo with cone and a central discharging orifice was performed. Two cases were studied, with and without using insert in silo. Numerical analysis was carried out with the help of the uncoupled arbitrary Lagrangian–Eulerian (ALE) approach. The resulting dynamic pressure distribution on the silo wall for each of the two cases was inferred numerically. The resulting values of pressure were compared with the results of the experimental study on a cylindrical metal silo to demonstrate the accuracy of the numerical model in determining the dynamic wall pressure, especially in the case of using an insert in silo during discharge.
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