Effect of Twisted Tape Insert On Heat Transfer During Flow Through A Pipe Using CFD
Abstract
The effect of nanoparticles on the performance of nanofluids during flow through pipes with dual twisted tape inserts. A detailed literature survey on the use of twisted tape inserts and computation thermal properties of nanofluids is presented. Expressions for nanofluid thermal properties computation are discussed. Properties for Al2O3 and TiO2 nanofluid with volume fraction of 0.1 are computed. CFD simulations to study the behaviour of fluid during heat transfer when flowing through pipes with dual twisted tape inserts. Results of these simulations are discussed in the paper.
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Introduction
Augmenting heat transfer during flow through pipes has always been interest for various researchers. There are three ways of augmenting heat transfer in fluids [1]. They are:
i. Active (use of mechanical aids, magnetic fields etc)
ii. Passive (using swirl generators like twisted tape etc which do no use external energy)
iii. Compound
Conclusion
Nanofluids are currently being used for better heat transfer. In the current work, the effectiveness of nanofluid during heat when flowing through a tube with dual twisted tape inserts was investigated. Literature survey pertaining to use of swirl generators and evaluating nanofluid thermal properties is presented. Numerical relations for calculating thermal properties are listed. CFD simulations are executed to compute the heat flux with various nanofluids is executed and the results were discussed. The results indicated that nanofluids show greater increase in temperature but low volume fractions, both Al2O3 and TiO2 showed similar performance.