Open AccessA Study on flow boiling characteristics in a minichannel and conventional channel
Author(s) -
Thavamani Jeyaraj,
Kumar Perumal
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1130/1/012032
Subject(s) - nusselt number , heat flux , materials science , heat transfer , thermodynamics , heat transfer coefficient , boiling , mechanics , mass flux , mass flow rate , volumetric flow rate , nucleate boiling , critical heat flux , reynolds number , turbulence , physics
The flow boiling characteristics of minichannel and conventional have been evaluated for the various mass flux and heat flux. The impact of channels heat transfer analysis was carried out by mixture model (MM) of ANSYS Fluent by using water as a working fluid. The aim of this paper to find the better heat transfer in the channels at a different range of mass flow rates (0.020kg/s to 0.040 kg/s) and heat fluxes (1000 W/m 2 to 2000W/m 2 ). The analysis was explained with help of output parameters like vapour fraction, heat transfer coefficient, evaporative thin film thickness, temperature difference in channel wall side and film water temperature side, Nusselt number and friction factor. The validation was done with the help of the previous paper. It was observed that friction factor is calculated for various mass flow rate in channels, is lower from smaller diameter pipe but heat transfer is more for the case of bigger diameter. The minimum mass flow rate increases the wall surface temperature as well as high heat flux increase the channel wall temperature. The 4 mm conventional channel is better heat transfer rate compared to 3 mm minichannel.