Capillary boosting for enhanced heat pipe performance through bifurcation of grooves: Numerical assessment and experimental validation

2022-10-01
Saygan, Samet
Akkus, Yigit
Dursunkaya, Zafer
Cetin, Barbaros
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© 2022 Elsevier LtdIn this study, an enhanced heat pipe performance for grooved heat pipes has been demonstrated through capillary boosting with the introduction of the bifurcation of grooves. Wider grooves regularly branch to narrower grooves such that the total cross-sectional liquid flow area remains approximately the same. Following the computational framework drawn by a recently developed heat pipe analysis toolbox (H-PAT), we develop a numerical model for the heat pipes with tree-like groove architecture. Then we utilize the model to design a flat-grooved heat pipe with one step groove bifurcation at the evaporator. To verify our numerical findings, two heat pipes with and without groove bifurcation are manufactured and experimented under the same conditions. Experimental results show that the numerical model can predict the thermal performance quite accurately. The results reveal that groove bifurcation can be a viable option for a better thermal performance than that of heat pipes with standard grooved heat pipes with straight grooves which leads to at least 25% higher maximum heat transport capacity. The effect of number of branching on the temperature flattening across the heat pipe is also demonstrated for different evaporator lengths.
Grooved heat pipe, Groove bifurcation, Hierarchical wick, Tree-like fractal architecture, H-PAT, Capillary boosting, VAPOR CHAMBER, TREE, TEMPERATURE, MODEL, WICK, PRESSURE, FLOW, Capillary boosting, Groove bifurcation, Grooved heat pipe, H-PAT, Hierarchical wick, Tree-like fractal architecture
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85133810614&origin=inward
https://hdl.handle.net/11511/98833
International Communications in Heat and Mass Transfer
Department of Mechanical Engineering, Article

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Citation Formats
S. Saygan, Y. Akkus, Z. Dursunkaya, and B. Cetin, “Capillary boosting for enhanced heat pipe performance through bifurcation of grooves: Numerical assessment and experimental validation,” International Communications in Heat and Mass Transfer, vol. 137, pp. 0–0, 2022, Accessed: 00, 2022. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85133810614&origin=inward.
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