Proceedings of the 27th National and 5th International ISHMT-ASTFE Heat and Mass Transfer Conference December 14-17, 2023, IIT Patna, Patna-801106, Bihar, India
Effect of solid wall on convective heat transfer in Taylor flow in microchannels
摘要
Microchannel systems are emerging as an effective alternative to most of the conventional flow systems. Hence, it is important to understand the transport behaviour in such systems, especially in multiphase flow. Taylor flow regime is
generally considered as the most effective regime for heat
transfer in two phase flow heat transfer in microchannel
systems. In this direction, modelling and experimental studies
have been carried out by many researchers and basic understanding of heat transfer behaviour in such systems has
been established. The detailed studies for more realistic
conditions and effect of various channel geometries are
currently being explored. Solid wall and its thickness is an
important parameter taken into account while manufacturing
such microchannel systems and has great impact on the convective heat transfer behaviour in Taylor flow through
microchannels. The same is being studied in this work by
carrying out CFD simulations of air-water two phase flow
system in a microchannel with the constant wall temperature
and constant heat flux conditions. The corresponding results
related to variation of wall heat flux, wall temperature and
Nusselt number (Nu) along the channel length are presented and
discussed in detail. The results indicated that wall thickness
causes enhancement in the heat transfer rate and play a significant role in such flow systems. Hence it must be
considered for any further related CFD simulation studies as it
can help in understanding the more realistic heat transfer
behaviour in such systems and hence in designing such system
more effectively.