Little is known about the linearity of portable peak flow meters, or about physical gas factors affecting peak expiratory flow (PEF) readings. We therefore tested five portable peak flow meters of three types in an altitude chamber (sea level to 5,500 m) and in a climate chamber at sea level (7-37 degrees C) to determine the influence of the physical conditions of the gas on the reading of the ...

This paper presents a detailed model of common rail diesel injector and its validation using injection rate measurement. A new method is described for nozzle flowrate determination simulation measurement tools. The contains fluid dynamic, mechanic electro-magnetic systems, describing all-important internal processes also includes the meter model. Injection measurements were made Bosch method, b...

Investigating nozzle’s orifice flow is challenging both experimentally and theoretically. This paper focuses on simulating flow inside diesel injector nozzle via Ansys fluent v15. Validation is performed with experimental results from Winkhofler et al (2001). Several important parameters such as mass flow rate, velocity profiles and pressure profiles are used for this validation. Results includ...

The modern era in the quantitative measurement of phasic blood flow patterns may be said to have begun with the development of the differential pressure recorders. Of these, the orifice meter has, perhaps, been used most extensively by investigators.l, In 1943, Shipley, Gregg, and Schroeder reported their studies of blood flow patterns in peripheral arteries using this instrument.2 They and oth...

investigating nozzle’s orifice flow is challenging both experimentally and theoretically. this paper focuses on simulating flow inside diesel injector nozzle via ansys fluent v15. validation is performed with experimental results from winkhofler et al (2001). several important parameters such as mass flow rate, velocity profiles and pressure profiles are used for this validation. results includ...

Analysis of velocity acceleration proximal to a regurgitant valve has been proposed as a method to quantify the regurgitant flow rate (Qo). Previous work has assumed inviscid flow through an infinitesimal orifice, predicting hemispheric isovelocity shells, with calculated flow rate given by Qc = 2 pi rN2vN, where vN is user-selected velocity of interest and rN is the distance from that velocity...