| Full text | |
| Author(s): |
Silva Junior, Luis G.
[1]
;
Silva, Felipe A. S.
[1]
;
Faria, Tiago G.
[2]
;
Kessler, Martin P.
[2]
;
Salviano, Leandro O.
[3]
Total Authors: 5
|
| Affiliation: | [1] Sao Paulo State Univ, Energy Engn, Rosana - Brazil
[2] Engn Simulat & Sci Software Inst, Vila Mariana - Brazil
[3] Sao Paulo State Univ, Dept Mech Engn, Ilha Solteira - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS; v. 35, n. 6 OCT 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
Increasing heat transfer in heat exchangers remains an important research topic for industrial and residential applications. The usage of passive techniques remains a reference due to the lower costs, however, increasing the heat transfer in laminar flow with low-pressure loss remains a challenge. The objective of this paper is to perform a constrained optimisation of a twisted-tape inside a circular tube at low Reynolds number. Twisted tape pitch (P), length (L), translate (T), and twisted tape radius (R1 and R2) were submitted to optimisation. The flow is steady-state, laminar and incompressible. The NSGA-II is the method used for the optimisation procedure. The optimisation process found an optimal twisted-tape geometry with an asymmetric shape for both Reynolds numbers, corresponding to a global heat transfer increase of approximately 90% for Reynolds number 300 and 170% for Reynolds number 600, while for symmetric twisted-tape with ratio 4 (R4) is 57% and 52%, respectively. (AU) | |
| FAPESP's process: | 17/17032-3 - Optimization of geometric parameters of twisted tape for augmentation of heat transfer on solar collector |
| Grantee: | Luis Gonçalves da Silva Junior |
| Support Opportunities: | Scholarships in Brazil - Scientific Initiation |