Interaction between multiple bubbles in microchannel flow boiling and the effects on heat transfer

Lombaard, L.; Moghimi, M.A.; Valluri, Prashant; Meyer, Josua P.

doi:10.1016/j.icheatmasstransfer.2021.105703

Cited by 5 publications

(3 citation statements)

References 19 publications

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“…For the injection of four bubbles, the effects of both X bw and Y bb (= X bb ) are also considered at the same time. According to Lombaard et al 15 and Kitagawa et al, 36 when bubbles are very small (such as micron or sub‐millimeter bubbles), the injection of a single bubble has very little influence on heat transfer. In Deen and Kuipers 23 and Bhuvankar and Dabiri, 26 the influence of single millimeter‐sized bubbles on flow and heat transfer was investigated.…”

Section: Physical Problems and Numerical Methodsmentioning

confidence: 99%

“…Natural convection heat transfer can be seen in a wide range of industrial fields such as biomedicine, 1–4 mineral smelting, 5–10 and energy and chemical engineering 11–16 . When the fluid velocity is low, the thermal boundary layer will become thicker.…”

Section: Introductionmentioning

confidence: 99%

“…Natural convection heat transfer can be seen in a wide range of industrial fields such as biomedicine, [1][2][3][4] mineral smelting, [5][6][7][8][9][10] and energy and chemical engineering. [11][12][13][14][15][16] When the fluid velocity is low, the thermal boundary layer will become thicker. This leads to a decrease in heat transfer efficiency between phases.…”

Section: Introductionmentioning

confidence: 99%

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Numerical investigations on the effect of bubble injection on heat transfer of natural convection in laminar flows

Lei,

Pang

2023

Asia-Pacific J Chem Eng

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It was found that the injection of bubbles into liquid can effectively improve heat transfer efficiency, so it is important for industrial applications to investigate the effect of bubble injection on heat transfer. The effect of bubble injection on natural convective heat transfer in steady laminar flows in a vertical channel is investigated using the volume of fluid (VOF) method, and the effects of bubble diameter, Eötvös number (Eo), bubble arrangement, and bubble distance from a hot wall on the heat transfer between the hot wall and liquid are studied, respectively. The results show that bubble injection can effectively improve the heat transfer between the hot wall and liquid; an increase in bubble diameter and Eo can improve the enhancement effect of heat transfer and can expand the enhancement area of heat transfer; the closer to the hot wall a bubble is, the better the enhancement of heat transfer is; and the spacing and arrangement of bubbles also have important effects on the heat transfer between the hot wall and liquid. The comparison shows that the enhancement of heat transfer is the best for the vertical arrangement of double bubbles, which increases the local heat transfer coefficient by 3.2 times. The enhancement of heat transfer generated by bubble injection is related to the degree of disturbance of the local liquid phase caused by bubble injection. The more strongly the local liquid is disturbed, the thinner the local temperature boundary layer becomes, and the better the enhancement of heat transfer is.

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