CFD study of heat transfer enhancement and fluid flow characteristics of turbulent flow through tube with twisted tape inserts

Tusar, Mehedi; Noman, Abdullah Al; Islam, Mukhlis; Yarlagadda, Prasad K.D.V.; Salam, Bodius

doi:10.1016/j.egypro.2019.02.188

Cited by 28 publications

(9 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the theoretical Nu and f for plain pipe is computed using Gneilski and Petukhov correlations as given in Equations ( 20) and ( 21), similar to previous author Tusar et al 32 Nu R e P r = 0.0214 × ( − 100) × , 0.8 0.4…”

Section: ( )( )mentioning

confidence: 83%

“…However, the theoretical Nu and f for plain pipe is computed using Gneilski and Petukhov correlations as given in Equations (20) and (21), similar to previous author Tusar et al 32

Nu=0.0214\times ({{\text{Re}}}^{0.8}-100)\times {{\text{Pr}}}^{0.4},

f={(0.79\mathrm{ln}{\text{Re}}-1.64)}^{-2}.

…”

Section: Numerical Modelingmentioning

confidence: 93%

See 1 more Smart Citation

Numerical modeling and optimization of perforated twisted tape insert based on hybrid ANSYS‐RSM approach

Kadbhane,

Pangavhane

2023

Heat Trans

View full text Add to dashboard Cite

Heat exchangers have a wider scope in numerous applications, such as space heating, chemical industries, power stations, and so on. Due to heat loss and the thermal properties of the materials involved, the overall performance of a heat exchanger is questionable. Therefore, studies related to heat transfer techniques are appreciated in the research community. Thus, the present study numerically investigates the heat transfer performance of a horizontal heat pipe equipped with hexagonal perforated twisted tape inserts. Further, the numerical solutions of Nusselt number (Nu), friction factor (f), and thermal performance factor (TPF) are optimized with the help of response surface methodology (RSM). The parameters investigated in this study are Reynolds number (Re), which varies between 500 and 1500, input heat supply (Q) between 100 and 1000 W, and pitch ratio (3.2, 4, and 5.2). ANSYS fluid flow fluent was used to perform flow simulations for three different twisted tape inserts: horizontal, vertical, and alternate hexagon perforations. Optimum solutions are obtained at 1000 W heat supply, 1500 Re, and p/di = 4 from alternatively perforated twisted tape inserts. The optimum Nu, f, and TPF achieved are 119.545, 0.437, and 1.82, respectively. Also, the proposed RSM optimization method is evidenced with a maximum of 2.673% error during the confirmatory test.

show abstract

Section: ( )( )mentioning

confidence: 83%

“…However, the theoretical Nu and f for plain pipe is computed using Gneilski and Petukhov correlations as given in Equations (20) and (21), similar to previous author Tusar et al 32

Nu=0.0214\times ({{\text{Re}}}^{0.8}-100)\times {{\text{Pr}}}^{0.4},

f={(0.79\mathrm{ln}{\text{Re}}-1.64)}^{-2}.

…”

Section: Numerical Modelingmentioning

confidence: 93%

Numerical modeling and optimization of perforated twisted tape insert based on hybrid ANSYS‐RSM approach

Kadbhane,

Pangavhane

2023

Heat Trans

View full text Add to dashboard Cite

show abstract

“…For this reason, various convective heat transfer enhancement techniques have been developed in the past decades. The main methods included active enhancement [3][4][5], passive enhancement [6][7][8], and a combination of both [9,10].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Heat Transfer and Flow Characteristics of a Helically Coiled Tube with Twisted Elliptical in a Low Reynolds Number Flow

2022

View full text Add to dashboard Cite

In this paper, the heat transfer and flow characteristics of a helically coiled tube with twisted elliptical in a low Reynolds number (Re = 500–3000) flow were investigated numerically. The working fluid flowed in a laminar regime. Numerical results were compared with empirical correlations in the existing literature, demonstrating the accuracy of the analysis in this study. Firstly, we investigated the effects of geometric parameters and Reynolds number on the heat transfer and flow characteristics. The results showed that lower twist pitch length and semi-major axis length could induce sufficient fluid mixing and a larger temperature gradient near the tube wall, enhancing the heat exchange and producing larger friction resistance. Overall, the heat transfer performances were improved by about 1.04–1.21 times and 1.02–1.23 times for different semi-major axis lengths and different twist pitch lengths, respectively, compared to the smooth helical coil. Secondly, by changing the working fluid, it was found that the Nu when oil was chosen as the working fluid was all 6–6.8 times higher than that of water. Moreover, the effect of using Al2O3 nanofluids with a concentration of 0.10 wt.%, 0.25 wt.% and 0.50 wt.% was discussed. It can be seen that the heat transfer capacity of nanofluids increased by approximately 2–18% compared to the reference model with water as the working fluid, and the nanofluid solution with higher concentration has better heat transfer performance. Finally, Nu and f correlations are given to predict the heat transfer and pressure drop in practical applications.

show abstract

“…Khoshvaght-Aliabadi et al [12] revealed that agitated vessel heat exchanger fitted with spiky aluminum twisted tape inserts resulted in approximately 67% increased heat transfer coefficient than a regular plain pipe. Tusar et al [13] numerically studied heat transfer augmentation and flow characteristics of airflow through a tube combined with twisted tape inserts for turbulent flow regime. Their findings showed that the maximum increment of Nusselt number and flow resistance is 62% and 245%, respectively.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Heat Transfer Enhancement of Turbulent Flow Using Twisted Tape Insert Fitted with Hemispherical Extruded Surface

Rubbi¹,

Habib²,

Tusar³

et al. 2020

IJHT

Self Cite

View full text Add to dashboard Cite

Heat transfer enhancement of heat exchangers is an important matter of concern to achieve more effective thermal energy conversion systems. The use of modified twisted tape (TT) inserts as passive technique of heat transfer augmentation are effective way to improve heat transfer. In this study, a numerical analysis is performed to investigate the heat transfer performance enhancement and flow behavior in a circular pipe using TT insert fitted with a hemispherical extruded surface (HES). The study is carried out for the turbulent flow regime (4000≤Re≤10000) at a twist ratio of 4.0 using ANSYS FLUENT. A flow domain is designed and mathematically modeled applying boundary conditions and using governing equations for turbulent model. The plain tube data is validated with established correlations. The achieved numerical results reveal that for TT fitted with HES leads to increment in heat transfer rate up to 69.4% compared to plain tube due to effective swirl flow and better mixing caused by the insert. Corresponding increase in friction factor is found relative to plain tube. The impact on the thermal performance factor has obtained a maximum of 1.24 at constant pumping power for Reynold number 4000.

show abstract

CFD study of heat transfer enhancement and fluid flow characteristics of turbulent flow through tube with twisted tape inserts

Cited by 28 publications

References 14 publications

Numerical modeling and optimization of perforated twisted tape insert based on hybrid ANSYS‐RSM approach

Numerical modeling and optimization of perforated twisted tape insert based on hybrid ANSYS‐RSM approach

Analysis of Heat Transfer and Flow Characteristics of a Helically Coiled Tube with Twisted Elliptical in a Low Reynolds Number Flow

Numerical Study of Heat Transfer Enhancement of Turbulent Flow Using Twisted Tape Insert Fitted with Hemispherical Extruded Surface

Contact Info

Product

Resources

About