TY  - JOUR
T1  - Impact of Conical and Fusiform Turbulators on Heat Transfer Enhancement and Pressure Drop Inside a Double-Tube Heat Exchanger
AU  - Begag, Abdelaziz
AU  - Bouregueba, Amel
AU  - Bboudi, Said A
AU  - Saim, Rachid
PY  - 2025
DA  - September
Y2  - 2025
DO  - 10.5541/ijot.1675049
JF  - International Journal of Thermodynamics
PB  - Uluslararası Uygulamalı Termodinamik Derneği İktisadi İşletmesi
WT  - DergiPark
SN  - 1301-9724
SP  - 142
EP  - 151
VL  - 28
IS  - 3
LA  - en
AB  - This study focuses on enhancing heat transfer in a concentric double-tube heat exchanger by incorporating internal turbulators of two distinct geometries: conical and fusiform. The study numerically investigates the impact of these turbulators, placed within the inner tube, on turbulent flow and thermal performance over a Reynolds number range of 4000 to 12,000. A numerical study was carried out using ANSYS Fluent 16.0 software, where the governing equations were solved by the finite volume method. The Realizable k–ε turbulence model was used to capture the effects of turbulence on the flow field. Key performance indicators such as the Nusselt number and pressure drop were analyzed for both configurations. The results reveal that fusiform turbulators provide superior thermal enhancement, increasing the average Nusselt number by up to 34% compared to a smooth tube. However, this enhancement is accompanied by a significant increase in pressure drop across all tested cases, underlining the trade-off between heat transfer improvement and flow resistance. These findings demonstrate the effectiveness of fusiform geometries in improving the thermohydraulic efficiency of tubular heat exchangers.
KW  - Turbulator
KW  - heat exchanger
KW  - double-tube
KW  - heat transfer enhancement
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UR  - https://doi.org/10.5541/ijot.1675049
L1  - https://dergipark.org.tr/en/download/article-file/4768555
ER  -