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

Autor(es)

Silva Junior, Luis G. ^[1] ; Silva, Felipe A. S. ^[1] ; Faria, Tiago G. ^[2] ; Kessler, Martin P. ^[2] ; Salviano, Leandro O. ^[3]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS; v. 35, n. 6 OCT 2021.
• Citações Web of Science: 0

Resumo

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)

• Processo FAPESP: 17/17032-3 - Otimização dos parâmetros geométricos de uma fita torcida para a intensificação da transferência de calor em coletor solar
• Beneficiário: Luis Gonçalves da Silva Junior
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica