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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

onstrained Direct Optimisation of the Geometrical Parameters of a Twisted-Tape for Laminar Flow in a Circular Tub

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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