Numerical study of bubble growth and wall heat transfer during flow boiling in a microchannel

Mukherjee, Aritra; Kandlikar, Satish G.; Edel, Zachary

doi:10.1016/j.ijheatmasstransfer.2011.01.030

Cited by 113 publications

(59 citation statements)

References 38 publications

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“…This deviation may be due to the fact that the present simulations are two-dimensional as compared to the three simulations in the published result [17].…”

Section: Verification Of the Present Numerical Modelmentioning

confidence: 57%

“…In this study, further verification is presented below by comparing the present two-dimensional model with the published three numerical as well as experimental results [17].…”

Section: Verification Of the Present Numerical Modelmentioning

confidence: 61%

“…A channel of width 0.229 mm, static contact angle of 30°and wall superheat of 2°C is considered for simulation. For verification, the rate of bubble growth is compared with the experimental as well as three numerical results of Mukherjee et al [17] and is shown in Fig. 3.…”

Section: Verification Of the Present Numerical Modelmentioning

confidence: 99%

“…Numerical studies have also been performed by various researchers for both pool boiling and flow boiling [10][11][12][13][14][15][16][17]. Tomar et al [12] performed a study on bubble formation in film boiling using Coupled Level Set and Volume of Fluid (CLSVOF) method on water and a refrigerant, R134a at near and far critical pressures.…”

Section: Introductionmentioning

confidence: 99%

“…They also studied the interactions between multiple bubbles rising through a cavity under gravity. Mukherjee et al [17] performed a three-dimensional numerical study of the bubble growth and heat transfer where-in they studied the effects of static contact angle, Reynolds number, wall superheat and surface tension on bubble dynamics and heat transfer.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Numerical modelling of bubble growth in microchannel using Level Set Method

Katiyar

Karagadde

Saha

2016

International Journal of Heat and Mass Transfer

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“…This deviation may be due to the fact that the present simulations are two-dimensional as compared to the three simulations in the published result [17].…”

Section: Verification Of the Present Numerical Modelmentioning

confidence: 57%

“…In this study, further verification is presented below by comparing the present two-dimensional model with the published three numerical as well as experimental results [17].…”

Section: Verification Of the Present Numerical Modelmentioning

confidence: 61%

Section: Verification Of the Present Numerical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Numerical modelling of bubble growth in microchannel using Level Set Method

Katiyar

Karagadde

Saha

2016

International Journal of Heat and Mass Transfer

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Forced convection boiling in a stator–rotor–stator spinning disc reactor

et al. 2016

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Boiling of a pure fluid inside the rotor-stator cavities of a stator-rotor-stator spinning disc reactor (srs-SDR) is studied, as a function of rotational velocity x, average temperature driving force DT and mass flow rate / m . The average boiling heat transfer coefficient h b increases a factor 3 by increasing x up to 105 rad s 21, independently of DT and / m . The performance of the srs-SDR, in terms of h b vs. specific energy input , is similar to tubular boiling, where pressure drop provides the energy input. The srs-SDR enables operation at > 10 5 Wm 23R , yielding values of h b not practically obtainable in passive evaporators, due to prohibitively high pressure drops required. Since h b is increased independently of the superficial vapor velocity, h b is not a function of / m and the local vapor fraction. Therefore, the srs-SDR enables a higher degree of control and flexibility of the boiling process, compared to passive flow boiling. V C 2016 American Institute of Chemical Engineers AIChE J, 00: 000-000, 2016 Keywords: evaporation, spinning disc reactor, heat transfer, intensification IntroductionForced convection boiling processes are widely encountered in the (chemical) process industry, e.g., in evaporative separations, in refrigeration cycles and in withdrawing heat of highly exothermic reactions.1,2 Intensification of boiling heat transfer reduces the required heat exchange area, which reduces the capital costs and the space requirements. Moreover, it allows the application of a lower temperature driving force DT, which is thermodynamically favorable and essential in utilization of low-grade heat streams using vapor recompression. Intensification of flow boiling is realized by increasing the boiling heat transfer coefficient h b , and by efficient removal of the formed vapor phase from the heat exchanging surface.The heat transfer in forced convection boiling occurs via two parallel mechanisms, viz. nucleate boiling and convective evaporation. [3][4][5][6][7] Both mechanisms contribute to the overall value of h b . Nucleate boiling is the formation of vapor bubbles at the heat exchanging surface, due to a high local superheating of the liquid. The formation of bubbles induces convection on a microscale, which leads to high values of h b , similar to pool boiling. 1,8,9 Convective evaporation is the macroscale fluid forced convection, with evaporation occurring at the liquid-vapor interface. Typically, at a high heat flux q 00 , obtained at a high DT, and a low vapor superficial velocity v G , h b is dominated by the nucleate boiling mechanism, resulting in a high value of h b . At a high vapor velocity (at a high mass flow rate / m or a high vapor fraction x G ), nucleate boiling is suppressed due to a more effective withdrawal of the local superheat by forced convection, 10,11 resulting in lower values of h b , compared to the nucleate boiling regime. 5,6 In this convective evaporation regime, h b increases with increasing turbulence in the liquid and decreasing distance between the heat exchanging ...

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A numerical study of flow boiling in a microchannel using the local front reconstruction method

et al. 2022

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The rapid advances in performance and miniaturization of electronic devices require a cooling technology that can remove the produced heat at a high rate with small temperature variations, as is obtained in flow boiling. To obtain insight in flow boiling, we performed numerical simulations in a 200 μm square microchannel using the local front reconstruction method. Besides validation with literature results, a parametric study shows an increasing heat removal rate and bubble growth rate with increasing wall temperature, liquid mass density, and liquid heat capacity and decreasing inlet velocity indicating the importance of phase change compared to convective transport. Finally, the heat transfer in the liquid film is studied using a Nusselt number defined with the film thickness, which is comparable to Nusselt number for falling films on hot surfaces. It is observed that convective effects are more pronounced at the bubble rear compared to the bubble front.

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Numerical study of bubble growth and wall heat transfer during flow boiling in a microchannel

Cited by 113 publications

References 38 publications

Numerical modelling of bubble growth in microchannel using Level Set Method

Numerical modelling of bubble growth in microchannel using Level Set Method

Forced convection boiling in a stator–rotor–stator spinning disc reactor

A numerical study of flow boiling in a microchannel using the local front reconstruction method

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