This paper presents a novel device for pumping a column of liquid in a microchannel integrated on a digital microfluidic (DMF) platform. The electrowetting on dielectric (EWOD) method is used to frequently actuate a droplet (referred to as the piston droplet) on an array of electrodes. A column of liquid (referred to as the pumped droplet) is pumped in a microfluidic channel by the pressure com...

In contrast to the conventional rotational compressors, the linear compressor is driven by a linear motor directly coupled with a piston. So the performance of the linear compressor is strongly dependent on the characteristics of the linear motor. In addition to high efficiency, the parameters of a linear motor should be nearly constant regardless of the amount of the current flow and position ...

We study the Casimir piston for massless scalar fields obeying Dirichlet boundary conditions in a three dimensional cavity with sides of arbitrary lengths a, b and c where a is the plate separation. We obtain an exact expression for the Casimir force on the piston valid for any values of the three lengths. As in the electromagnetic case with perfect conductor conditions, we find that the Casimi...

Reliability assessment of reciprocating equipment piston rod leads to nonlinear elastic-plastic deformation analysis of rod with initial imperfection under axial dynamic load. In this paper a new and effective model and analytical simulation method are presented to evaluate dynamic deformation and elastic-plastic stress of reciprocating machine piston rod. This new method has capability to acco...

I C engines are the largest energy converting units for the mobile application across the globe and millions of litres of oil is converted into mechanical energy using these engines every day. It has been recognized that a large amount of energy is lost in the friction between Piston ring – Cylinder assembly. Hence this area has been the interest of research for decades. Oil film thickness form...

The major problems encountered in a reciprocating compressor are because of the valve failure .The other problem of leakage past the piston because of the worn out piston rings has also been placed in the reciprocating compressor. Pressure pulsations generated inside the piping of a reciprocating compressor may be taken as one of the tool for diagnosing the nature of fault inside the compressor...

A model of a flat triple pendulum with obstacles imposed on its position is used for the modelling of a piston-connecting rod-crankshaft system of a mono-cylinder four-stroke combustion engine. The introduced selfexcited system can be only treated as the first step in more advanced modelling of real processes, but some examples of numerical simulations exhibit well known six stages of the pisto...

This paper presents investigations of two special cases of dynamic valve analysis. These special cases arose in the development of a new type of gas field reciprocating compressor. These special cases were for a moving frame of reference (since the discharge valves were integral with the piston) , and for independent mass damping {sealing/damping elements are modelled separately instead of as "...

We present a novel design of a single-cylinder free piston engine linear generator (FPELG) incorporating a linear motor as a rebound device. A systematic simulation model of this FPELG system was built containing a kinematic and dynamic model of the piston and mover, a magneto-electric model of the linear generator, a thermodynamic model of the single-cylinder engine, and a friction model betwe...