Heat transfer and flow visualization of pulsating heat pipe with silica nanofluid: An experimental study

Zhang, Dongwei; He, Zhuantao; Guan, Jian; Tang, Songzhen; Shen, Chao

doi:10.1016/j.ijheatmasstransfer.2021.122100

Cited by 76 publications

(22 citation statements)

References 29 publications

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“…Therefore, there was a minimum temperature different was measured for 80% filler ratio at 40W heat input [32][33][34][35]. Similar results were reported elsewhere [36][37][38]. The variation of temperature with different filler ratio of acetone with increase in heat input for all the combinations is shown in Figure 2(a) to Figure 2(f).…”

Section: Temperature Variation For Acetonesupporting

confidence: 78%

“…Heat transfer performance of the OHP with acetone was determined by considering filler ratio of 50% to 80% and heat input of 15W, 20W, 25W, 30W, 35W and 40W was considered. The difference in temperature of evaporator and condenser section temperatures with heat input is studied at steady state condition [26][27][28][29][30]. The obtained results indicated that higher fill ratio of working fluid shows the better results in terms of reduction in difference in temperature, increased heat transfer coefficient across the evaporator and condenser.…”

Section: Resultsmentioning

confidence: 99%

“…Regression and Analysis of variance (ANOVA) method is used to predict the parameters experimentally to find the significant factors are statistically significant. MINITAB was a powerful statistical tool to obtained or analyse the significance of factors [22][23][24][25][32][33][34][35][36]. In the present analysis filler ratio and heat input was considered as an input variable to determine temperature difference (Te-Tc), heat transfer coefficient and thermal resistance.…”

Section: Discussionmentioning

confidence: 99%

“…Experiments was conducted by using a newly fabricated oscillating heat pipe setup consists of copper tubes, glass tube, silicon rubber tube, mica heater, condenser, K-type thermocouple, glass wool, data acquisition system, and heat control unit respectively. Acetone with four turns oscillating heat pipe was used to determine the thermal performance of the OHP system [25][26][27][28][29][30]. The physical and thermodynamic properties of Acetone (working fluid) is tabulated in Table 1.…”

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Assessment and Prediction of Heat Transfer Performance of Oscillating Heat Pipe using Acetone

Prashanth¹,

Madhu²,

Ramanarasimha³

et al. 2022

ARFMTS

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Heat pipe is a device to enhance the performance of heat transfer, in particular to transition phase change process. The present investigation is carried out to measure the thermal performance of a closed loop acetone filled oscillating heat pipe with four turns is fabricated and tested. The test was carried out for the inner diameter of 1.7 mm copper tube by varying the acetone of 50%, 60%, 70% and 80% filler ratio with a heat input of 15 W to 40 W in steps of 5 W has been considered. The results shows that 80% acetone filled OHP provides the better thermal performance with an average minimum temperature difference between condenser and evaporator by 6.03%, heat transfer coefficient increased by 77% and the thermal resistance decrease by 43% respectively. The mathematical modelling was developed to predict the performance of the heat transfer. The model clearly shows that the independent variables are statistically significant with a p-value of 0.05 and the uncertainty analysis between the experimental and predicted values are less than 10%.

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Section: Temperature Variation For Acetonesupporting

confidence: 78%

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Assessment and Prediction of Heat Transfer Performance of Oscillating Heat Pipe using Acetone

Prashanth¹,

Madhu²,

Ramanarasimha³

et al. 2022

ARFMTS

View full text Add to dashboard Cite

show abstract

“…Another reason to choose closed PHP instead of open PHP is that, with a closed channel, the liquid column and bubbles have a smoother movement and more obvious visualization results [11]. At present, the variable research of closed PHP focuses on the type of working fluids, filling ratio, heat flux power, and inclination angle where it is not necessary to fabricate massive PHPs [12][13][14]. Because the production process of closed PHP is complicated, most of the research can only produce a limited number of PHPs before the experiment.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer performance and prediction of open pulsating heat pipe for self-cooling cutting tool

Bao

Xing

et al. 2022

Int J Adv Manuf Technol

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The pulsating heat pipe (PHP) can be used to transfer massive heat to reduce the thermal damage to the cutting tool when machining difficult-to-cut materials. To select a better open PHP, the heat transfer performance was experimentally investigated in this study. The operating characteristics of different types of working fluids under different heat flux were analyzed compared with the closed PHP. Visual experiments were established to verify the experimental characteristics. The effects of heat flux, length, ratio of inner/outer diameter, and inclination angle on equivalent thermal resistance were analyzed. Based on the experimental data and four boosting integrating learning methods, a model for heat transfer performance prediction was proposed. The prediction model based on the CatBoost method had better goodness-of-fit and the best prediction effect. The R 2 , MAPE, and RMSE of the validation set were the best, which are 0.9258, 7.2564, and 0.1057 respectively. In addition, the contribution of input parameters to the output results was evaluated, while L, Di/Do, and Pr were the top three variables. Sub-tree structures used to explain the prediction model were also presented. This proposed prediction model can be used to select the most suitable open PHP before designing PHP self-cooling tools.

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Heat transfer in a dissipative nanofluid passing by a convective stretching/shrinking cylinder near the stagnation point

Khan,

Puneeth,

Alaoui

et al. 2023

Z Angew Math Mech

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This contemporary article examines the transfer of heat properties and the flow behavior of water‐based nanofluid suspended with silver nanoparticles. These silver nanoparticles have a very huge thermal conductivity and hence it is presumed that the resulting nanofluid shall have enhanced thermal conductance. This article is more focused on the study of nanofluid flowing past a cylinder that is modeled mathematically using the cylindrical coordinate system. The initial modeling is designed using a system of partial derivatives while at a later stage, this system is transformed into a nonlinear group of ordinary differential equations (ODEs). The equations in this system are solved to obtain the dual solutions by implementing the RKF‐45 method which has a greater rate of convergence and additionally, it is computationally very effective. The findings of the study are dealt by plotting graphs and the discussions are based on the appearance of graphs. It is further noticed that the critical point remains constant at −42.58 for any changes made in the values of heat generation/absorption coefficient. Similarly, the critical value remains constant at −42.6 for any change made in the values of the Eckert number. Meanwhile, it is also observed that the increase in the Eckert number increases the temperature absorbed by the nanofluid whereas it decreases the Nusselt number. Furthermore, the higher values of the velocity slip reduce the skin friction coefficient.

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Heat transfer and flow visualization of pulsating heat pipe with silica nanofluid: An experimental study

Cited by 76 publications

References 29 publications

Assessment and Prediction of Heat Transfer Performance of Oscillating Heat Pipe using Acetone

Assessment and Prediction of Heat Transfer Performance of Oscillating Heat Pipe using Acetone

Heat transfer performance and prediction of open pulsating heat pipe for self-cooling cutting tool

Heat transfer in a dissipative nanofluid passing by a convective stretching/shrinking cylinder near the stagnation point

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