Jet Impingement
Jet Impingement - Related Videos
13:29
Jet Impinging on an Inclined Plate
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2023
Source: Ricardo Mejia-Alvarez and Hussam Hikmat Jabbar, Department of Mechanical Engineering, Michigan State University, East Lansing, MI The goal of this experiment is to demonstrate how a fluid flow exerts forces on structures by conversion of dynamic pressure into static pressure. To this end, we will make a plane jet impinge on a flat plate and will measure the resulting pressure distribution along the plate. The resultant force will be estimated by integrating the product between the...
11:31
Determination of Impingement Forces on a Flat Plate with the Control Volume Method
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2023
Source: Ricardo Mejia-Alvarez and Hussam Hikmat Jabbar, Department of Mechanical Engineering, Michigan State University, East Lansing, MI The purpose of this experiment is to demonstrate forces on bodies as the result of changes in the linear momentum of the flow around them using a control volume formulation [1, 2]. The control volume analysis focuses on the macroscopic effect of flow on engineering systems, rather than the detailed description that could be achieved with a differential...
08:34
Visualization of High Speed Liquid Jet Impaction on a Moving Surface
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Cited by 4 •
2015
Two experimental devices for examining liquid jet impingement on a high-speed moving surface are described: an air cannon device and a spinning disk device. The apparatuses are used to determine optimal approaches to the application of liquid friction modifier (LFM) onto rail tracks for top-of-rail friction control.
08:10
Synthesizing Lipid Nanoparticles by Turbulent Flow in Confined Impinging Jet Mixers
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Cited by 20 •
2024
A detailed protocol for synthesizing lipid nanoparticles (LNPs) using confined impinging jet (CIJ) mixer technologies, including a two-jet CIJ and a four-jet multi-inlet vortex mixer (µMIVM), is demonstrated. The CIJ mixers generate reproducible, turbulent micro-mixing environments, resulting in the production of monodisperse LNPs.
08:35
Lipid Bilayer Vesicle Generation Using Microfluidic Jetting
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Cited by 16 •
2014
Microfluidic jetting against a droplet interface lipid bilayer provides a reliable way to generate vesicles with control over membrane asymmetry, incorporation of transmembrane proteins, and encapsulation of material. This technique can be applied to study a variety of biological systems where compartmentalized biomolecules are desired.
FAQs
At the target, the incoming stream slows in a stagnation region before turning and moving radially across the surface. This change in direction creates a localized flow structure rather than simple downstream transport. The resulting surface motion helps engineers concentrate heat or mass transfer near the impact area and then distribute it outward across the target.
A boundary layer can limit transport between a fluid and a surface. Jet impingement disrupts this layer as the high-velocity flow strikes and spreads across the target, producing strong local transport rates. That behavior explains why the technique can deliver targeted cooling, heating, drying, or surface treatment instead of relying only on broadly distributed flow.
Jet velocity and nozzle-to-surface spacing are important design variables because they determine how the flow arrives at and interacts with the target. Velocity characterizes the strength of the incoming jet, while spacing affects the jet’s approach before impact and the subsequent surface flow. Engineers evaluate both when designing compact thermal systems and other controlled-transfer processes.
Array configuration determines how multiple impinging flows are arranged over a surface and therefore influences the distribution of transport across the target. This consideration becomes important when a design must treat more than one localized region or cover a larger area. Engineers use array configuration as a performance variable alongside velocity, spacing, and fluid properties.
An engineering application begins by identifying whether the goal is cooling, heating, drying, or surface treatment, then selecting a fluid-flow arrangement suited to the target. Designers consider jet velocity, nozzle-to-surface spacing, fluid properties, and array configuration. Evaluating these variables helps match local transport behavior with the required surface process and system compactness.
Applications include turbine-blade cooling, electronic thermal management, metal processing, and manufacturing. In these settings, the method provides localized enhancement of heat or mass transfer, allowing engineers to address demanding surface conditions within compact systems. Its value comes from combining targeted interaction at the impact region with radial spreading across the treated surface.