Computational fluid dynamics analysis in a ribbed tube with different twisted tape inserts to enhance the heat transfer

Gugulothu, Santhosh Kumar

doi:10.1080/01430750.2020.1722224

Cited by 3 publications

(2 citation statements)

References 17 publications

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“…The main purpose of this comparison was to understand the rate of heat flow and temperature distribution along with the various length of the pipes. The study also observed that in the case of HLUTT and HLDTT tapes, there is a decrease in the thermal performance factor with an increase in Re and twisted ratios which are showing in Figure 4, whereas in the case of FLTT, the thermal performance factor tends to increase with different twisted ratios and improvements of Re [12]. Paneliya et al, [13] found 1.27 times larger heat transfer enhancement for X-Shaped tapes than twisted tape inserts by comparing the thermal characteristic of water flowing in a tube equipped with X-tape and twisted tape to investigate the effect of insert tape geometry on the heat exchanger tubes [13].…”

Section: Twisted Tape Insertsmentioning

confidence: 65%

“…Another recent study of Gugulothu [12] has been conducted a CFD analysis to investigate the ribbed tube with different twisted tapes insert (FLTT, HLUTT, HLDTT) at uniform heat flux condition to sort out the performance characteristics of thermal efficiency, friction factor and mean Nusselt number. Air was treated as a working fluid and the simulations (Ansys Fluent) were carried out in a turbulent region by choosing suitable Re and found FTTT showed a better heat transfer, friction factor and enhancement efficiency compared to HLTT as a numerical result.…”

Section: Twisted Tape Insertsmentioning

confidence: 99%

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Review on Heat Transfer Enhancement by Insert Devices

Ahmed

Abedin

2020

IJEMM

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The scientists revise the heat transfer enhancement techniques time to time to achieve better performance and to obtain optimized designs of heat exchangers. The present study reviews the performance and techniques of heat transfer enhancement using various insert devices such as twisted tape and wire coil insert as well as completely different forms of other inserts like air-foil shape inserts, X-shaped twisted tape inserts, baffles and V-winglets inserts with various types of medium and nanofluids. According to the summary of recent significant researches on the heat transfer enhancement by using different types of inserts and combinations of these inserts with various nanofluids showed that insert can indicatively enhance the heat transfer rate by modifying its geometry or configurations like twist ratio, length ratio, pitch ratio, segmented tape, perforated tape, angle of arrangements and insert quantities and so on which caused a considerable impact on performance characteristics of heat transfer enhancement along with the pressure drop and friction factor. It is revealed through reviewing the related literature that the highest value of equivalence heat transfer enhancement is as maximum as 400%, 300% and 9% for the twisted tape insert with helical tube, the air foil shaped inserts and for the wire coil inserts, respectively when compared with the smooth tube. In the case of baffles in nanofluids, as maximum as 255% equivalence heat transfer enhancement could be achieved when compared with that of baffles without nanofluids.

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Section: Twisted Tape Insertsmentioning

confidence: 65%

Section: Twisted Tape Insertsmentioning

confidence: 99%