Thermal Rectification Film using Liquid Crystalline Asymmetric Diodes

Autor(es)

Silva, Vinicius ^[1] ; Pereira, Erms ^{[1, 2]} ; Moraes, Fernando ^[1] ; Fumeron, Sebastien ^[3]

Afiliação do(s) autor(es)

^[1] Univ Fed Rural Pernambuco, Dept Phys, BR-52171900 Recife, PE - Brazil

^[2] Univ Pernambuco, Polytech Sch Pernambuco, Rua Benfica, 455, BR-50720001 Recife, PE - Brazil

^[3] UMR Univ Lorraine, Lab Phys & Chim Theor, CNRS7019, F-54506 Vandeouvre Ies Nancy - France

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Journal of Physics; v. 51, n. 6 SEP 2021.
• Citações Web of Science: 0

Resumo

The purpose of the study is to present an all-passive thermal rectifier system: a transparent film comprising liquid crystalline thermal diodes. The rectification film is a transparent borosilicate box confining a distribution of conical frustum tubes full of an asymmetric liquid crystalline molecular structure. We solved the Fourier and Laplace equation numerically using the finite element software COMSOL Multiphysics. We also studied the efficiency of the systems varying the size, the asymmetry, and the thermal inputs of the structures. We show the film produces thermal rectification up to 31%, due to the heat flux between individual diodes. It presents robustness against high temperatures and income heat flux, and its maximum performance occurs to a thinner thickness and a specific geometric configuration. Comparing with previous works, our proposed systems presented good efficiency as a passive device, enabling temperature management without spending energy. Since it is an all-passive thermal rectifier system, we hope it represents an advance on the topics of green ideas. (AU)

• Processo FAPESP: 14/50983-3 - INCT 2014: fluidos complexos
• Beneficiário: Antonio Martins Figueiredo Neto
• Modalidade de apoio: Auxílio à Pesquisa - Temático