Flow and Heat Transfer in Two-Phase Flow Immiscible Droplets in Microchannels DOI
Dariush Mehboodi, Reza Kamali, Saeed Kheirati Ronizi

et al.

Nanoscale and Microscale Thermophysical Engineering, Journal Year: 2023, Volume and Issue: 28(1), P. 1 - 27

Published: Oct. 24, 2023

The enhancement of heat transfer in microchannels without phase change is a significant area study, primarily driven by the internal fluid recirculation two-phase flows. This investigation focuses on circular microchannel, 100 μm diameter, where mineral oil droplets are introduced into water flow. study utilizes conservative level set method for precise interface tracking and liquid film thickness measurement. research introduces modified Nusselt number, specifically tailored to describe characteristics multiphase delves effects varying droplet sizes, from small spheres slug. findings indicate that most occurs with whose volume closely matches sphere fitting within channel. Moreover, explores impact parameters like inlet velocity, primary-phase slug length, contact angle. Notably, higher velocities lead improved transfer, resulting substantial increase number compared single-phase underscores delicate balance between intensity capacity concerning as excessive variations can harm thermal performance. It also highlights pivotal role surface wettability, showing performance hydrophobic surfaces.

Language: Английский

Numerical study on hydrodynamic characteristics and heat transfer enhancement of gas-liquid Taylor flow in divergent microchannels DOI
Fuxing Jia, Shanwei Li, Min Wei

et al.

Process Safety and Environmental Protection, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

Citations

1
Experimental investigation of flow boiling heat transfer and instabilities in microchannels at high liquid subcooling DOI
Chengyu Hu,

Zihuan Ma,

Xiang Ma

et al.

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(3)

Published: March 1, 2025

Flow boiling in a microchannel effectively removes high heat flux and plays crucial role the thermal management of electronic devices. Microchannel dimensional parameters have significant impact on flow characteristics, but their quantitative correlation with behavior remains undetermined. In this work, five microchannels different were designed to investigate effects geometric characteristics under liquid subcooling (70 °C). The study identified two primary patterns microchannel: bubble slug flow. Special was observed. expanded rapidly at exit microchannel, head shrank into small bubbles detached. remaining channel would be temporarily quiescent. Additionally, increasing rib width decreasing accelerated transition prematurely triggered critical (CHF). Increasing number channels can lead reduction CHF significantly lower wall temperature by more than 18 °C. A 280.7 W/cm2 achieved R200-200 superheat not exceeding 13 reducing improve transfer coefficient (HTC), maximum HTC 26 kW/m2K. growth elongation constrained upstream reasons for reversal. width, resulted fluctuations pressure drop microchannels. This complements understanding performance, providing valuable insight optimizing dissipation design.

Language: Английский

Citations

0
Heat transfer characteristics of Taylor flow in a bottom-heated square microchannel: A 3D conjugate heat transfer numerical study DOI
Changliang Wang, Yingtao Zhang, Zunlong Jin

et al.

Applied Thermal Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 126509 - 126509

Published: April 1, 2025

Language: Английский

Citations

0
Study on internal circulation patterns and heat transfer characteristics of gas-liquid Taylor flow in a gradually expanding microchannel DOI
Fuxing Jia, Haibin Zhang, Changliang Wang

et al.

Chemical Engineering and Processing - Process Intensification, Journal Year: 2025, Volume and Issue: 212, P. 110283 - 110283

Published: March 21, 2025

Language: Английский

Citations

0
Taylor bubble splitting, flow and coalescence in branching microchannels: An experimental and numerical simulation study DOI
Changliang Wang, Zunlong Jin, Dingbiao Wang

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 486, P. 150231 - 150231

Published: March 6, 2024

Language: Английский

Citations

2
Breakup regimes and heat transfer of an isolated bubble and Taylor bubble flow in the T-type microchannel DOI
Zheng Zhang, Xia Zhang, Shuping Zhang

et al.

International Journal of Thermal Sciences, Journal Year: 2024, Volume and Issue: 206, P. 109351 - 109351

Published: Aug. 19, 2024

Language: Английский

Citations

2
An experimental investigation on characteristics of liquid film thickness of gas-liquid Taylor flow in square/rectangular microchannel applied in microreactor DOI
Dengwei Fu, Yifei Hu, Zhaoyu Li

et al.

International Journal of Heat and Mass Transfer, Journal Year: 2024, Volume and Issue: 234, P. 126081 - 126081

Published: Aug. 28, 2024

Language: Английский

Citations

1
Heat transfer enhancement in a ribbed T-shaped microchannel by oil-water slug flow DOI

Fahimeh Farajzad Dangharalou,

Mohammad Goharkhah

Journal of the Taiwan Institute of Chemical Engineers, Journal Year: 2024, Volume and Issue: 162, P. 105577 - 105577

Published: May 30, 2024

Language: Английский

Citations

1
Flow and Heat Transfer in Two-Phase Flow Immiscible Droplets in Microchannels DOI
Dariush Mehboodi, Reza Kamali, Saeed Kheirati Ronizi

et al.

Nanoscale and Microscale Thermophysical Engineering, Journal Year: 2023, Volume and Issue: 28(1), P. 1 - 27

Published: Oct. 24, 2023

The enhancement of heat transfer in microchannels without phase change is a significant area study, primarily driven by the internal fluid recirculation two-phase flows. This investigation focuses on circular microchannel, 100 μm diameter, where mineral oil droplets are introduced into water flow. study utilizes conservative level set method for precise interface tracking and liquid film thickness measurement. research introduces modified Nusselt number, specifically tailored to describe characteristics multiphase delves effects varying droplet sizes, from small spheres slug. findings indicate that most occurs with whose volume closely matches sphere fitting within channel. Moreover, explores impact parameters like inlet velocity, primary-phase slug length, contact angle. Notably, higher velocities lead improved transfer, resulting substantial increase number compared single-phase underscores delicate balance between intensity capacity concerning as excessive variations can harm thermal performance. It also highlights pivotal role surface wettability, showing performance hydrophobic surfaces.

Language: Английский

Citations

3