in this research mass transfer coefficient under jetting regime in different directions (from dispersed to continuous and continuous to dispersed phase) has been studied using an experimental setup. n-butanol-succinic acid-water with low interfacial tension has been selected as experimental chemical system. the effects of various parameters such as jet velocity, nozzle diameter and the height o...

OF DOCTORAL DISSERTATION HELSINKI UNIVERSITY OF TECHNOLOGY P.O. BOX 1000, FI-02015 TKK http://www.tkk.fi Author Guangyu Cao Name of the dissertation Modelling the attached plane jet in a room Manuscript submitted 25.02.2009 Manuscript revised 31.08.2009 Date of the defence 13.11.2009 Monograph Article dissertation (summary + original articles) Faculty Faculty of Engineering and Architecture Dep...

Article history: Received: 09.06.2015. Received in revised form: 01.10.2015. Accepted: 08.10.2015. Liquid nitrogen is expected to be used as a jet medium in petroleum engineering because of its cryogenic and non-polluting characteristics. To identify the velocity distribution characteristics of liquid nitrogen jet, a computational fluid dynamics model was built by coupling the equations for nit...

This study aims to investigate the dynamics characteristics of liquid jet injected from a needle-free injection device by analyzing the the flow visualization from the high-speed video camera and the CFD calculation. This is to investigate the jet flow phenomena (e.g. penetration, dispersion, velocity) in the quiescent air and in the tissue simulant (20% polyacrylamide gel) as the further infor...

This study focuses on the flow field of a round synthetic jet issuing into a crossflow. Six cases are investigated in which the jet-to-freestream velocity ratios range between 2.8 and 8.3. This corresponds to a medium-to-strong transverse jet, which is characterized using both two-dimensional hot-wire anemometry and particle image velocimetry techniques. A self-similar model is developed for th...

The different methods to derive the jet velocity and orientation on the parsec scale are presented. From these methods I will discuss the velocity distribution of parsec scale jets and the possible presence of acceleration or deceleration in the jet velocity. Moreover, evidences of jet velocity structures will be reported. Finally I will present new data on the superluminal giant radio source 1...

The velocity and temperature conditions in the space surrounding a single nozzle discharging hot pas vertically downwards on to a horizontal surface have been studied. Except at very loii exit velocities, the amount of recirculation to an intake situated on the axis of the jet is small. Within limits , the d;rnamic head at ground level at a point away .-,.>(0 i 'li-from the axis is indepenknl o...

The evolution of starting jet circulation, impulse and kinetic energy are derived in terms of kinematics at the entrance boundary of a semi-infinite axisymmetric domain. This analysis is not limited to the case of parallel jet flows; and the effect of non-zero radial velocity is specifically identified. The pressure distribution along the entrance boundary is also derived as it is required for ...