A three-terminal device based upon a two-dimensional electron system is investigated in the regime of nonequilibrium transport. Excited electrons scatter with the cold Fermi sea and transfer energy and momentum to other electrons. A geometry analogous to a water jet pump is used to create a jet pump for electrons. Because of its phenomenological similarity we name the observed behavior the “ele...

due to the importance of weed control and the limitations of mechanical methods in some places, in this research the water jet cutting for weed control was investigated. the cutting tests were performed on camel thorn weed in shahid bahonar university of kerman. the water jet pressure of 90 bars was achieved with the aid of a suitable pump. the cutting time was studied in a completely randomize...

ABSTRACT This paper proposes a new valveless pump using a PZT diaphragm to create a gas jet flow for fluidic applications. The pump was designed and simulated based on transient fluidic analysis with experimental result of PZT diaphragm so that the features of micropump are reliably predicted. The experimental results of a PMMA prototype confirmed the performance of the pump. The fabrication pr...

OBJECTIVE During extracorporeal circulation design and orientation of aortic cannulae tips mainly determine flow pattern in the aortic arch and arch vessels which is the objective of this in vitro study, comparing single versus multiple stream cannulae. METHODS In an aortic arch glass model, jet streams of 21-24 French aortic cannulae which were inserted in the ascending aorta were directed a...

To promote the development and application of liquid–gas jet pump (LGJP), research status its design theory, internal flow mechanism, structural optimization practical are reviewed. The history LGJP is briefly reviewed, latest progress introduced, pulse-type LGJP, especially centrifugal vacuum (CJVP), emphatically discussed. direction analyzed proposed: CFD will be more deeply applied to mechan...

A femtosecond degenerate four-wave mixing (fs-DFWM) technique for probing the alignment of molecules is described. The rotational wave packet generated by a strong pump beam modulates the nonresonant third-order susceptibility of the gas and this modulation is observed using a noncollinear background-free setup. As a demonstration of the technique, we measure the alignment of a linear molecule ...