Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
VARYING GEOMETRY OF MICRO-CHANNEL FLOW SIMULATED WITH LATTICE BOLTZMANN METHOD
Submission Author:
Arthur do Canto Pivetta , RS
Co-Authors:
Arthur do Canto Pivetta, Cirilo Seppi Bresolin
Presenter: Arthur do Canto Pivetta
doi://10.26678/ABCM.COBEM2021.COB2021-1062
Abstract
Microchannel heat exchangers have gained importance with the development of technology that requires heat exchange in small scale, such as electronics. The lattice Boltzmann method presents good capacity to simulate complex geometry and small-scale physics. This paper presents a comparison between different geometries of microchannels with varying spacing between internal obstacles and different boundary conditions, using the lattice Boltzmann method to simulate with varying Reynolds numbers. Observed output parameters were: Nusselt number, average temperature and Darcy friction factor. The results present an increased Nusselt number and Darcy friction factor for smaller spacing between obstacles. Nusselt number presents varying behavior with variation of Reynolds for the different boundary conditions, especially for small Reynolds numbers (around 1). Average temperature increases by decreasing Reynolds number or spacing between objects, as expected.
Keywords
Micro-channel, Lattice Boltzmann method, Heat transfer enhancement
