Eventos Anais de eventos
ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
THEORETICAL ANALYSIS OF LIQUID FILM SENSORS BASED ON ELECTRICAL CONDUCTANCE
Submission Author:
Victor Eduardo Corte Baptistella , SP
Co-Authors:
Victor Eduardo Corte Baptistella, Gherhardt Ribatski
Presenter: Victor Eduardo Corte Baptistella
doi://10.26678/ABCM.ENCIT2020.CIT20-0183
Abstract
The liquid film plays an important role in the characterization of two-phase annular flows. The mean thickness, the presence of waves, their height, frequency, and velocity influence heat transfer rate, critical heat flux and pressure drop. Although it has been widely studied for conventional-sized channels, there is a lack of studies concerning liquid film characterization in mini and microchannels, due to the inherent difficulties associated to small scale conditions. In the present paper, a theoretical analysis is performed of different configurations of micro sensors applied to the measurement of the liquid film thickness based on its electric conductance. This analysis is performed based on results for the average film thickness in microchannels estimated based on different modelling approaches from literature.
Keywords
Microchannel, liquid film thickness, Annular flows, Dryout, Flow boiling
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