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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
HEAT TRANSFER ENHANCEMENT STUDY IN MICRO SCALE USING A CO-FLOW DEVICE
Submission Author:
Victor Carlos Teixeira , PA , Brazil
Co-Authors:
Victor Carlos Teixeira, Antônio da Cruz, Gabriel Mario Guerra Bernadá, Fernando Pereira Duda
Presenter: Victor Carlos Teixeira
doi://10.26678/ABCM.ENCIT2020.CIT20-0504
Abstract
In this paper, we analyze the convective heat transfer enhancement in a cilyndrical microchannel using a co-flow device to periodically produce spherical immiscible droplets in a continuous liquid flow. We use a phase-field model consisting of the Navier-Stokes/Cahn-Hilliard equations coupled with the energy equation. Based on the local and average Nusselt number and the temperature field distribution, we discuss the heat exchange increase with the spherical droplet-laden flow, compared with the case of single-phase flow. The results suggests the existence of a optimal flow ratio between the immiscible phases giving the highest heat exchange within the microchannel.
Keywords
Heat transfer, Microchannel, droplets, Phase field
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