Direct numerical simulation of flow boiling in a finned microchannel

Lee, Woorim; Son, Gihun; Yoon, Han Young

doi:10.1016/j.icheatmasstransfer.2012.08.005

Cited by 32 publications

(17 citation statements)

References 20 publications

(21 reference statements)

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“…As large topological changes are crucial for phase change problems, many researchers have turned to the front capturing methods due to their versatility in complex interface deformation. In [7], Welch and Wilson on a horizontal cylinder [11], nucleate boiling in microcavity [12] and flow boiling in a finned microchannel [13]. Gada and Sharma [55] proposed a method called a dual-grid level set method that uses two mesh sizes.…”

Section: Literature Review On the Numerical Studies Of Multiphase Flomentioning

confidence: 99%

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Direct numerical simulation of incompressible multiphase flow with phase change

Lee

Riaz

Aute

2017

Journal of Computational Physics

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Phase change problems arise in many practical applications such as air-conditioning and refrigeration, thermal energy storage systems and thermal management of electronic devices.The physical phenomenon in such applications are complex and are often difficult to be studied in detail with the help of only experimental techniques. The efforts to improve computational techniques for analyzing two-phase flow problems with phase change are therefore gaining momentum.The development of numerical methods for multiphase flow has been motivated generally by the need to account more accurately for (a) large topological changes such as phase breakup and merging, (b) sharp representation of the interface and its discontinuous properties and (c) accurate and mass conserving motion of the interface. In addition to these considerations, numerical simulation of multiphase flow with phase change introduces additional challenges related to discontinuities in the velocity and the temperature fields. Moreover, the velocity field is no longer divergence free. For phase change problems, the focus of developmental efforts has thus been on numerically attaining a proper conservation of energy across the interface in addition to the accurate treatment of fluxes of mass and momentum conservation as well as the associated interface advection.Among the initial efforts related to the simulation of bubble growth in film boiling applications the work in [1] was based on the interface tracking method using a moving unstructured mesh. That study considered moderate interfacial deformations. A similar problem was subsequently studied using moving, boundary fitted grids Among the front capturing methods, sharp interface methods have been found to be particularly effective both for implementing sharp jumps and for resolving the interfacial velocity field. However, sharp velocity jumps render the solution susceptible to erroneous oscillations in pressure and also lead to spurious interface velocities. To implement phase change, the work in [16] employed point mass source terms derived from a physical basis for the evaporating mass flux. To avoid numerical instability, the authors smeared the mass source by solving a pseudo time-step diffusion equation. This measure however led to mass conservation issues due to non-symmetric integration over the distributed mass source region. The problem of spurious pressure oscillations related to point mass sources was also investigated by [17]. Although their method is based on the VOF, the large pressure peaks associated with sharp mass source was observed to be similar to that for the interface tracking method.Such spurious fluctuation in pressure are essentially undesirable because the effect is globally transmitted in incompressible flow. Hence, the pressure field formation due to phase change need to be implemented with greater accuracy than is reported in current literature.The accuracy of interface advection in the presence of interfacial mass flux (mass flux conservation) has been discussed in [14,18]. ...

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Section: Literature Review On the Numerical Studies Of Multiphase Flomentioning

confidence: 99%

“…The work in [10] used the ghost fluid and the level set methods for phase change simulations. A similar approach was adopted in [11] to study various boiling problems including three-dimensional film boiling on a horizontal cylinder, nucleate boiling in microcavity [12] and flow boiling in a finned microchannel [13].…”

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confidence: 99%

Direct numerical simulation of incompressible multiphase flow with phase change

Lee

Riaz

Aute

2017

Journal of Computational Physics

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“…Lee et al [15] performed a numerical simulation on a boiling flow in a finned microchannel using a modified level-set method. The solid region was included in the computational domain so that the thermal response in it could be taken into account.…”

Section: Introductionmentioning

confidence: 99%

Three dimensional numerical simulation on bubble growth and merger in microchannel boiling flow

Ling

Son

Sun

et al. 2015

International Journal of Thermal Sciences

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“…As another result of the study, they stated that change in the heated length and inner surface properties were the main reason of conflict between the researchers' experimental results. Lee et al [136] numerically compared the heat transfer performance of smooth and finned microchannel by using sharpinterface LSM (Level Set Method). They studied the influence of fin length, spacing and height on flow boiling in a micro channel.…”

Section: Surface Modification In Minichannels and Microchannelmentioning

confidence: 99%

A Review of Flow Boiling in Mini and Microchannel for Enhanced Geometries

Dalkılıç¹

2018

Journal of Thermal Engineering

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Flow boiling researches in enhanced geometries practiced recently have been summarized in this review. Classical approximations in macroscale flows have not applied to the flows with small hydraulic diameters, so, this subject has been paid attention by the researchers. Application areas of these structures are increasing continuously due to cooling need in small confined spaces. The related studies have been reviewed in a chronological manner and their parameters have been given in a table in order for the researchers to observe the scientific duration regarding the progresses on this subject. Almost all papers on this subject have been produced after 2000, therefore, this subject is considered as an actual one to improve and worth to study in the literature. This study can not only be evaluated as the beginning argument for the researchers involved in flow boiling process in mini and microchannel, but it also consists of new works on the investigated subject.

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Direct numerical simulation of flow boiling in a finned microchannel

Cited by 32 publications

References 20 publications

Direct numerical simulation of incompressible multiphase flow with phase change

Direct numerical simulation of incompressible multiphase flow with phase change

Three dimensional numerical simulation on bubble growth and merger in microchannel boiling flow

A Review of Flow Boiling in Mini and Microchannel for Enhanced Geometries

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