Comparative study of heat transfer and pressure drop for curved-twisted tubes utilized in chemical engineering

doi:10.1016/j.cjche.2021.03.026

中国化学工程学报 ›› 2021, Vol. 40 ›› Issue (12): 53-64.DOI: 10.1016/j.cjche.2021.03.026

• Fluid Dynamics and Transport Phenomena • 上一篇下一篇

Comparative study of heat transfer and pressure drop for curved-twisted tubes utilized in chemical engineering

Morteza Khoshvaght-Aliabadi¹, Saber Deldar², Shafiqur Rehman³, Ashkan Alimoradi^4,5

1. Department of Chemical Engineering, Shahrood Branch, Islamic Azad University, Shahrood, Iran;
2. Department of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran;
3. Center for Engineering Research, The Research Institute, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia;
4. Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Viet Nam;
5. Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Viet Nam

收稿日期:2020-07-14 修回日期:2021-02-20 出版日期:2021-12-28 发布日期:2022-01-14
通讯作者: Morteza Khoshvaght-Aliabadi,E-mail:mkhaliabadi@iau-shahrood.ac.ir
基金资助:
The authors are grateful for the support by the Islamic Azad University of Shahrood Branch.

Comparative study of heat transfer and pressure drop for curved-twisted tubes utilized in chemical engineering

Morteza Khoshvaght-Aliabadi¹, Saber Deldar², Shafiqur Rehman³, Ashkan Alimoradi^4,5

1. Department of Chemical Engineering, Shahrood Branch, Islamic Azad University, Shahrood, Iran;
2. Department of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran;
3. Center for Engineering Research, The Research Institute, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia;
4. Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Viet Nam;
5. Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Viet Nam

Received:2020-07-14 Revised:2021-02-20 Online:2021-12-28 Published:2022-01-14
Contact: Morteza Khoshvaght-Aliabadi,E-mail:mkhaliabadi@iau-shahrood.ac.ir
Supported by:
The authors are grateful for the support by the Islamic Azad University of Shahrood Branch.

摘要/Abstract

摘要： Increasing importance of heat transfer in chemical engineering science causes that investigation in the field of enhancement techniques is always one of the up-to-date topics for study. In the current comparative analysis, the thermal enhancement and friction penalty are explored numerically for curved tubes via twisted configuration. To accomplish this, three common geometries namely helical, serpentine, and Archimedes spiral, are considered at different coil-pitches and twist-pitches as well as five Reynolds numbers in the laminar flow regime. The results exhibit noticeable enhancements (up to 60%) in the thermal performance of the twisted cases as compared to the smooth cases. The highest increases are recorded for the serpentine case, followed by the helical and spiral cases. It is found that these enhancements vary via coil-pitch and twist-pitch. Increasing coil-pitch and twist-pitch augments both heat transfer coefficient and pressure drop in all curved-twisted tubes, however, the effects of twist-pitch are more pronounced. To predict Nusselt number and friction factor, new correlations are also proposed. The maximum deviations of the predicted results compared to the simulated data are within ±5%.

关键词: Computational fluid dynamics, Heat transfer, Laminar flow, Curved-twisted tubes, Comparative study

Abstract: Increasing importance of heat transfer in chemical engineering science causes that investigation in the field of enhancement techniques is always one of the up-to-date topics for study. In the current comparative analysis, the thermal enhancement and friction penalty are explored numerically for curved tubes via twisted configuration. To accomplish this, three common geometries namely helical, serpentine, and Archimedes spiral, are considered at different coil-pitches and twist-pitches as well as five Reynolds numbers in the laminar flow regime. The results exhibit noticeable enhancements (up to 60%) in the thermal performance of the twisted cases as compared to the smooth cases. The highest increases are recorded for the serpentine case, followed by the helical and spiral cases. It is found that these enhancements vary via coil-pitch and twist-pitch. Increasing coil-pitch and twist-pitch augments both heat transfer coefficient and pressure drop in all curved-twisted tubes, however, the effects of twist-pitch are more pronounced. To predict Nusselt number and friction factor, new correlations are also proposed. The maximum deviations of the predicted results compared to the simulated data are within ±5%.

Key words: Computational fluid dynamics, Heat transfer, Laminar flow, Curved-twisted tubes, Comparative study

Morteza Khoshvaght-Aliabadi, Saber Deldar, Shafiqur Rehman, Ashkan Alimoradi. Comparative study of heat transfer and pressure drop for curved-twisted tubes utilized in chemical engineering[J]. 中国化学工程学报, 2021, 40(12): 53-64.

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Comparative study of heat transfer and pressure drop for curved-twisted tubes utilized in chemical engineering

Comparative study of heat transfer and pressure drop for curved-twisted tubes utilized in chemical engineering

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