Results 21 to 30 of about 4,183,596 (242)

Conceptualisation of a novel electromechanical system for small-volume needle-free jet injection

open access: yesEngineering Applications of Computational Fluid Mechanics, 2023
Needle-free jet injectors are minimally invasive drug delivery systems that utilise high-velocity microjets (∼100 m/s) created by pressurising the liquid drug through a micronozzle (50–300 µm in diameter).
Abdul Mohizin, Jung Kyung Kim
doaj   +1 more source

Identifying the processes and characterizing the pressure zone of water jet impacting on solid surface

open access: yesAdvances in Mechanical Engineering, 2022
The difficulty in understanding the flow characteristics of water jets impacting on solid surfaces made the water jet technology requiring further investigations. The Arbitrary Lagrange-Euler (ALE) method is used to develop a numerical model of the water
Jianguo Zhang   +3 more
doaj   +1 more source

Analytical Model of Critical Ventilation Flow Rate for Accidental Hydrogen Leakage in a Confined Space

open access: yesEnergies, 2023
The determination of the critical ventilation flow rate is significant for risk control and standard development during accidental hydrogen leakage in a confined space with hydrogen-related equipment.
Xuxu Sun   +4 more
doaj   +1 more source

Impinging jets array: an experimental investigation and numerical modeling [PDF]

open access: yesE3S Web of Conferences, 2019
This paper reports on the measurements of wall shear stress and static pressure along a smooth static wall upon which jet impingement occurs. The effect of a single circular jet, respectively an array of jets is studied using a high speed/resolution ...
Dhondoo Nilesh   +2 more
doaj   +1 more source

Characteristics of Air Impingement From an Orifice on a Target Plate [PDF]

open access: yesEngineering and Technology Journal, 2013
The present work is an experimental and numerical CFD study of air impingement from orifices of different sizes in the range of (10-40) mm with a step increase of 10 mm.
Adnan A. Abdul Rasool
doaj   +1 more source

Study of Effect of Convergence Section Geometric on the Performance of a Sonic Nozzle [PDF]

open access: yesJournal of Applied Fluid Mechanics
Critical flow Venturi nozzles (toroidal, cylindrical, convergent–divergent, or    C–D) nozzles) have discharge coefficients predicted through numerical and experimental investigations.
F. A. Kassem, A. A. Zahran, M. Adel
doaj   +1 more source

Vortex shedding in a two-dimensional diffuser: theory and simulation of separation control by periodic mass injection [PDF]

open access: yes, 2004
We develop a reduced-order model for large-scale unsteadiness (vortex shedding) in a two-dimensional diffuser and use the model to show how periodic mass injection near the separation point reduces stagnation pressure loss.
Colonius, Tim   +2 more
core   +1 more source

OPTIMIZED CONTROLLER DESIGN FOR A BLOWDOWN SUPERSONIC WIND TUNNEL BY USING GENETIC ALGORITHM [PDF]

open access: yesمجله مدل سازی در مهندسی, 2017
Blowdown Supersonic Wind Tunnels (SWTs) are generally operated with a constant stagnation pressure in the settling chamber, with control usually provided by one or more pressure regulators or control valves. In this paper, first, a Simulink block diagram
Mehradad Bazazzadeh   +3 more
doaj   +1 more source

Estimation of stagnation performance metrics in magnetized liner inertial fusion experiments using Bayesian data assimilation

open access: yesPhysics of Plasmas, 2022
We present a new analysis methodology that allows for the self-consistent integration of multiple diagnostics including nuclear measurements, x-ray imaging, and x-ray power detectors to determine the primary stagnation parameters, such as temperature ...
P. Knapp   +29 more
semanticscholar   +1 more source

Analysis of the forces driving the oscillations in 3D fluidic oscillators [PDF]

open access: yes, 2019
One of the main advantages of fluidic oscillators is that they do not have moving parts, which brings high reliability whenever being used in real applications.
Baghaei, Masoud   +1 more
core   +2 more sources

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