Research on Helmholtz self-excited oscillating jets enhanced heat transfer in horizontal tubes DOI Open Access

Wenjiang Hou,

Jin Ping Ou,

Yan Chen

et al.

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(12)

Published: Dec. 1, 2024

The self-excited oscillating jets have several advantages, including simple structures, environmental friendliness, and high efficiency. It has become a prominent research focus in the heat transfer field. This study focuses on analyzing influence of oscillation chamber structural parameters interaction between coherent structures transfer. Combining enhancement pulsating backflow vortex with boundary layer theory, horizontal tube model is constructed. Large Eddy Simulation (LES) method simulates tubes. flow resistance mechanisms are investigated. results indicate that vortices downstream pipe alternate near shear layer. As approaches oscillator outlet, discrete decrease, pulsation effect weakens, temperature gradient diminishes tube, thickens. pressure drops coefficient tubes exhibit periodic pulsations. optimal Helmholtz obtained through comprehensive analysis: diameter ratio to upstream DT/d1 = 9.5, length LT/d1 4.3, collision wall angle α 100°. relationship factors been established, guiding application field enhanced

Language: Английский

Size-dependent thermal behavior of silver nanofluids in heat pipes: a comparative study of nanoparticle sizes DOI

Sivakumar Elumalai,

Manikandan Kadamban,

Ratchagaraja Dhairiyasamy

et al.

Journal of Thermal Analysis and Calorimetry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 20, 2025

Language: Английский

Citations

0
Investigation of heat transfer characteristics in heat pipe heat exchanger for space application DOI

P. Ramkumar,

Chiranjeevi Boddapati,

A. S. Vigneshraja

et al.

Deleted Journal, Journal Year: 2024, Volume and Issue: 245(1)

Published: July 12, 2024

Language: Английский

Citations

3
Effect of forced lateral vibration on flow and heat transfer performance within an annular fuel element DOI

Mingting Wu,

Yunlong Zhou,

Mei Yang

et al.

International Journal of Thermal Sciences, Journal Year: 2024, Volume and Issue: 208, P. 109523 - 109523

Published: Nov. 8, 2024

Language: Английский

Citations

2
Exploring the thermal benefits of surface-modified silver nanoparticle nanofluids in high heat flux applications DOI Creative Commons

Sivakumar Elumalai,

Manikandan Kadamban

Matéria (Rio de Janeiro), Journal Year: 2024, Volume and Issue: 29(4)

Published: Jan. 1, 2024

Language: Английский

Citations

1
Effects of Hall Current and Thermal Radiation on the Time-Dependent Swirling Flow of Hybrid Nanofluids over a Disk Surface: A Bayesian Regularization Artificial Neural Network Approach DOI Creative Commons

Faisal Nazir,

Nirman Bhowmike, Muhammad Zahid

et al.

AppliedMath, Journal Year: 2024, Volume and Issue: 4(4), P. 1503 - 1521

Published: Dec. 10, 2024

For automobile and aerospace engineers, implementing Hall currents thermal radiation in cooling systems helps increase the performance durability of an engine. In case solar energy systems, effectiveness heat exchangers collectors can be enhanced by best use hybrid nanofluids implementation a current, thermophoresis, Brownian motion, source/sink, time-dependent nanofluid flow over disk for Bayesian regularization ANN backpropagation algorithm. current physical model Cobalt ferrite CoFe2O4 aluminum oxide Al2O3 mixed with water, new category is called nanofluid. The study uses MATLAB bvp4c to unravel such intricate relations, transforming PDEs into ODEs. This analysis enables numerical solution several BVPs that govern system given problem. resulting from interaction between magnetic fields electrically conducting nanofluid, as transfer mechanism operating through absorption emission, are central factors controlling these fluids various fields. graphical interpretation assists demonstrating character parameters. source/sink parameter advantageous layering, but using high Schmidt number limits mass transfer. Additionally, technique intended solving ordinary differential equations. Training state, performance, error histograms, regression demonstration used analyze output neural network. addition this, there decrease fluid velocity values rise temperature while spinning. Thermal adds another level behavior altering how receives, emits, allows pass it.

Language: Английский

Citations

1
Research on Helmholtz self-excited oscillating jets enhanced heat transfer in horizontal tubes DOI Open Access

Wenjiang Hou,

Jin Ping Ou,

Yan Chen

et al.

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(12)

Published: Dec. 1, 2024

The self-excited oscillating jets have several advantages, including simple structures, environmental friendliness, and high efficiency. It has become a prominent research focus in the heat transfer field. This study focuses on analyzing influence of oscillation chamber structural parameters interaction between coherent structures transfer. Combining enhancement pulsating backflow vortex with boundary layer theory, horizontal tube model is constructed. Large Eddy Simulation (LES) method simulates tubes. flow resistance mechanisms are investigated. results indicate that vortices downstream pipe alternate near shear layer. As approaches oscillator outlet, discrete decrease, pulsation effect weakens, temperature gradient diminishes tube, thickens. pressure drops coefficient tubes exhibit periodic pulsations. optimal Helmholtz obtained through comprehensive analysis: diameter ratio to upstream DT/d1 = 9.5, length LT/d1 4.3, collision wall angle α 100°. relationship factors been established, guiding application field enhanced

Language: Английский

Citations

1