Study of Lattice Boltzmann Method for modeling flows in microchannels of solar absorbers

• Grant number: 18/09041-5
• Support type: Scholarships in Brazil - Doctorate (Direct)
• Effective date (Start): July 01, 2018
• Effective date (End): February 28, 2022
• Field of knowledge: Engineering - Mechanical Engineering - Transport Phenomena
• Principal researcher: Luben Cabezas Gómez
• Grantee: Luiz Eduardo Czelusniak
• Home Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Associated research grant: 16/09509-1 - Phase change heat transfer processes of high performance applied to solar energy recovery, AP.TEM

Abstract

Multiphase flows inside microfluid devices has receiving great attention due to the predictable advantages of the micro scale phenomena, related with enhanced efficiency of heat and mass transfer process, reduced axial dispersion and devices with reduced volume. In order to obtain these benefits, it is recommended a great understanding of the complex behavior of multiphase flow inside these devices (Yu et al., 2007). Microchannels systems with gas-liquid flows has many applications, as the heat exchangers with microchannels for cooling of electronic circuits with and without phase change (Qu e Mudawar, 2002; Kandlikar, 2002; Thome, 2004; Cheng e Wu, 2006; Cheng et al., 2007; e Cheng et al., 2009), and also heat exchangers with microchannels that work as solar absorbers (Oyinlola et al., 2015a, b, c; L'Estrange, 2015; and Drost et al., 2013). In this project, it is proposed to undertake modeling studies using the Lattice Boltzmann (LB) method of pseudopotential, aiming initially a detailed study of the numerical solution procedure and later a comprehension of the transport phenomena that take place in microchannels flows of heat exchangers used as thermal absorbers in power systems with solar energy. The pseudopotential LB method was chosen due to the computational implementation simplicity and to the fact that it does not need the solution of a differential equation to capture the gas-liquid interface movement. The LB method is also appropriate for parallel programing. For microchannel flows the LB method has been used in many works aiming the study of the hydrodynamics phenomena in gas-liquid flows, as bubble formation (Yu et al., 2007; Wu et al., 2008; Wang et al., 2011; Riaud et al., 2013; and Kamali e Van den Akker, 2013); as well as the convective boiling process (Gong e Cheng, 2014). (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

CZELUSNIAK, L. E.; MAPELLI, V. P.; GUZELLA, M. S.; CABEZAS-GOMEZ, L.; WAGNER, ALEXANDER J. Force approach for the pseudopotential lattice Boltzmann method. Physical Review E, v. 102, n. 3 SEP 10 2020. Web of Science Citations: 0.

GUZELLA, MATHEUS DOS SANTOS; CZELUSNIAK, LUIZ EDUARDO; MAPELLI, VINICIUS PESSOA; ALVARINO, PABLO FARINAS; RIBATSKI, GHERHARDT; CABEZAS-GOMEZ, LUBEN. Simulation of Boiling Heat Transfer at Different Reduced Temperatures with an Improved Pseudopotential Lattice Boltzmann Method. SYMMETRY-BASEL, v. 12, n. 8 AUG 2020. Web of Science Citations: 0.