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Related Experiment Video

Updated: May 24, 2026

Visualization of High Speed Liquid Jet Impaction on a Moving Surface

Visualization of High Speed Liquid Jet Impaction on a Moving Surface

Published on: April 17, 2015

Nanofluid impingement jet heat transfer.

Obida Zeitoun¹, Mohamed Ali

¹King Saud University, Mechanical Engineering Department, King Abdullah Institute for Nanotechnology, 800 Riyadh, 11421, Saudi Arabia. ozeitoun@ksu.edu.sa.

Nanoscale Research Letters

|February 21, 2012

Summary

This study demonstrates that alumina-water nanofluids enhance heat transfer between a jet and a surface. Increasing nanoparticle concentration boosts heat transfer efficiency, with results presented using Peclet numbers for broader applicability.

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Synthesizing Lipid Nanoparticles by Turbulent Flow in Confined Impinging Jet Mixers

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Published on: August 23, 2024

Area of Science:

Thermodynamics
Fluid Mechanics
Materials Science

Background:

Heat transfer enhancement is crucial for industrial efficiency.
Nanofluids offer potential for improved thermal performance compared to base fluids.
Understanding jet impingement heat transfer is vital for applications like cooling systems.

Purpose of the Study:

To experimentally investigate heat transfer characteristics of alumina-water nanofluid impinging jets.
To analyze the effects of nanoparticle concentration, flow rate, and geometry on heat transfer.
To develop a generalized heat transfer correlation for nanofluid jet impingement.

Main Methods:

Experimental setup involving a vertical round alumina-water nanofluid jet impinging on a horizontal circular surface.
Systematic variation of jet flow rates, nozzle diameters, disk diameters, and nanoparticle concentrations (0%, 6.6%, 10%).
Measurement of heat transfer coefficients and analysis of Nusselt numbers and Reynolds numbers.

Main Results:

Alumina-water nanofluid significantly enhances heat transfer compared to pure water.
Nusselt number increases with nanoparticle concentration at constant Reynolds number.
Heating disk diameter shows an inverse relationship with heat transfer efficiency.
Data presentation using Reynolds number based on jet diameter accounts for jet height and nozzle diameter effects.
Data presentation using Peclet number shows reduced sensitivity to nanoparticle concentration changes.

Conclusions:

Nanofluids are effective heat transfer fluids for jet impingement applications.
A generalized correlation was developed using Peclet numbers, nanoparticle concentration, and nozzle diameter ratio.
The findings provide valuable insights for optimizing thermal management systems using nanofluids.