A comparative study of pool boiling heat transfer in different porous artery structures

Zhang, Kai; Bai, Lizhan; Jin, Huixia; Lin, Guiping; Yao, Guice; Wen, Dongsheng

doi:10.1016/j.applthermaleng.2021.117759

Cited by 26 publications

(2 citation statements)

References 58 publications

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“…These combined effects enhance the cooling efficiency and thermal performance of the system, making it capable of handling higher heat loads without reaching CHF limitations. [52,53] We quantify the pool boiling heat transfer performance for water using inverse opals with a pore diameter of 500 nm, structures formed by 4-beam IL, and structures formed by PnP using phase masks with two different characteristic dimensions. The thickness of all the structures is less than 10 μm, which is significantly less than the thickness of the substrates (≈500 μm).…”

Section: Enhanced Two-phase Coolingmentioning

confidence: 99%

Interference Lithography‐Based Fabrication of 3D Metallic Mesostructures on Reflective Substrates using Electrodeposition‐Compatible Anti‐Reflection Coatings for Power Electronics Cooling

Singhal,

Dewanjee,

Bae

et al. 2024

Adv Elect Materials

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A nanostructured copper oxide (nCO) coating which can be electrochemically reduced to copper metal is demonstrated as an anti‐reflection coating, enabling interference lithography of three‐dimensionally structured templates on a surface compatible with subsequent electrodeposition steps. The nCO presents a black needle‐like structure which effectively absorbs the incident radiation during interference lithography. Specular and diffused reflectivity measurements confirm nCO has near‐zero reflectivity from at least UV (350 nm) to near IR (700 nm) wavelengths. A particularly important aspect of the nCO is its ability to be reduced to copper metal, enabling electrodeposition inside porous templates fabricated on the nCO. It is demonstrated electrodeposition of copper within 3D templates defined by interference lithography and proximity field nano‐patterning processes, forming mesostructured metals which enhance two‐phase cooling. The resultant 5 µm thick structures exhibited up to 3 times the critical heat flux and 2 times heat transfer coefficient of bare silicon. The structures are optimized via computational tools including Finite Difference Time Domain (FDTD) and COMSOL Multiphysics. The use of the approach demonstrated here can potentially find application in many areas given the broad importance of mesostructured metals for energy, biomedical, and mechanical applications.

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Section: Enhanced Two-phase Coolingmentioning

confidence: 99%

Interference Lithography‐Based Fabrication of 3D Metallic Mesostructures on Reflective Substrates using Electrodeposition‐Compatible Anti‐Reflection Coatings for Power Electronics Cooling

Singhal,

Dewanjee,

Bae

et al. 2024

Adv Elect Materials

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“…Study of pool boiling heat transfer with experimental approach has been the dominant path of research in the recent years. Modified heater surfaces, such as porous surface structures were tested by Zhang et al [14], Huang et al [15], Mehdikhani et al [16], and other types of modified heater surfaces, e.g., Ranjan et al [17], Nirgude and Sahu [18], Singh and Sharma [19], were subjected to pool boiling experiments and had shown enhanced heat transfer characteristics. On the other hand, there are many different theoretical models of bubble growth [6,20,21] and also a large number of approaches with simulation of pool boiling [22][23][24][25][26] available in the heat transfer literature.…”

Section: Introductionmentioning

confidence: 99%

Physical Model of a Single Bubble Growth during Nucleate Pool Boiling

Voglar¹

2022

Fluids

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A simplified physical model of a single bubble growth during nucleate pool boiling was developed. The model was able to correlate the experimentally observed data of the bubble’s growth time and its radius evolution with the use of the appropriate input parameters. The calculated values of separated heat fluxes from the heater wall, thermal boundary layer, and to the bulk liquid gave us a new insight into the complex mechanisms of the nucleate pool boiling process. The thermal boundary layer was found to supply the majority of the heat to the growing bubble. The heat flux from the thermal boundary layer to the bubble was found to be close to the Zuber’s critical heat flux limit (890 kW/m2). This heat flux was substantially larger than the input heater wall heat flux of 50 kW/m2. The thermal boundary layer acts as a reservoir of energy to be released to the growing bubble, which is filled during the waiting time of the bubble growth cycle. Therefore, the thickness of the thermal boundary layer was found to have a major effect on the bubble’s growth time.

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High‐Performance Boiling Surfaces Enabled by an Electrode‐Transpose All‐Electrochemical Strategy

Chen,

Hu,

Zhang

et al. 2024

Advanced Science

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High‐performance boiling surfaces are in great demand for efficient cooling of high‐heat‐flux devices. Although various micro‐/nano‐structured surfaces have been engineered toward higher surface wettability and wickability for enhanced boiling, the design and fabrication of surface structures for realizing both high critical heat flux (CHF) and high heat transfer coefficient (HTC) remain a key challenge. Here, a novel “electrode‐transpose” all‐electrochemical strategy is proposed to create superhydrophilic microporous surfaces with higher dendrites and larger pores by simply adding an electrochemical etching step prior to the multiple electrochemical deposition steps. Enabled by the high nucleation density and high wicking capability, a high boiling performance is shown on such “etching‐then‐deposition” surfaces with simultaneously high CHF of 2,641 ± 10 kW m−2 and high HTC of 214 ± 6 kW (m2 K)−1, which are more than 2.5 and 4.3‐fold enhanced from those on smooth surfaces, respectively. A very stable morphology and boiling performance of such surfaces subject to consecutive tests are also shown. Using this strategy, such superhydrophilic microporous layers are fabricated on curved surfaces with larger areas, both on spheres and slender cylinders, and demonstrate excellent boiling performance in quenching tests. This facile, geometry‐adaptive, durable, and scalable strategy is very promising for making high‐performance boiling surfaces for large‐scale industrial applications.

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A comparative study of pool boiling heat transfer in different porous artery structures

Cited by 26 publications

References 58 publications

Interference Lithography‐Based Fabrication of 3D Metallic Mesostructures on Reflective Substrates using Electrodeposition‐Compatible Anti‐Reflection Coatings for Power Electronics Cooling

Interference Lithography‐Based Fabrication of 3D Metallic Mesostructures on Reflective Substrates using Electrodeposition‐Compatible Anti‐Reflection Coatings for Power Electronics Cooling

Physical Model of a Single Bubble Growth during Nucleate Pool Boiling

High‐Performance Boiling Surfaces Enabled by an Electrode‐Transpose All‐Electrochemical Strategy

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