DEVICES FOR MEASURING VISCOSITY AND FOR INVESTIGATING FLUID FLOW THROUGH CAPILLARY-POROUS MEDIUMS

摘要

The devices comprise two hydraulic cylinders (1,2), communicating through a capillary (3) or a casing (3) filled with a porous medium. Each of the hydraulic cylinders (1,2) is formed of a piston (4,5) mounted within a casing (6,7) so as to provide a translational motion of the piston (4,5) by a drive. Each of the hydraulic cylinders (1,2) has a pressure sensor (8,9). The apparatuses further comprise displacement sensors (10,11) and a common base (12) to secure the hydraulic cylinders (1,2). A drive of the piston (4,5) is adapted to provide a rotational motion of the piston (4,5) by a screw (13,15)-and-nut (14,16) pair. The screw (13,15) of the pair is connected by one end to the piston (4,5) and by another end to the motor (17,18). The casing (6,7) is connected to the nut (14,16) via a resilient member (19,20). The pressure sensor (8,9) is formed as a connection of a displacement indicator with the nut (14,16) and the casing (6,7), and the displacement sensor (10,11) is formed as a connection of a displacement indicator with the piston (4,5) and the casing (6,7) of the hydraulic cylinder (1,2).