Abstract
Various types of tube enhancements have been proposed in order to increase heat transfer while minimizing any associated increases in pressure drop. This paper presents a numerical study of two different types of enhanced tubes: the relatively common twisted tape insert tube, and a novel tube with airfoil shaped pins on the inner surface. Each tube is studied in both the laminar and turbulent flow regime. In addition to the typical constant temperature and constant flux boundary conditions, a non-constant heat flux boundary condition is applied on one half of the tube, a situation which may be encountered when absorbing solar radiation. In general, each type of enhanced tube offers a thermal performance factor greater than unity at certain Re. In addition, the non-uniform heat flux boundary condition appears to function similarly as the uniform heat flux boundary condition.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 445-454 |
| Number of pages | 10 |
| Journal | Proceedings of the Thermal and Fluids Engineering Summer Conference |
| Volume | 2020-April |
| DOIs | |
| State | Published - 2020 |
| Event | 5th Thermal and Fluids Engineering Conference, TFEC 2020 - New Orleans, United States Duration: Apr 5 2020 → Apr 8 2020 |
Keywords
- Computational fluid dynamics
- Heat transfer enhancement
- Numerical heat transfer
ASJC Scopus subject areas
- Fluid Flow and Transfer Processes
- Energy Engineering and Power Technology
- Renewable Energy, Sustainability and the Environment
- Electrical and Electronic Engineering
- Mechanical Engineering
- Condensed Matter Physics