Characteristics of gas-liquid two-phase flow in a capillary tube

Fukano, Tohru; Kariyasaki, Akira

doi:10.1016/0029-5493(93)90092-n

Cited by 249 publications

(110 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Fig. 10 and 11 in their paper, the present data are also consistent with those of Fukano & Kariyasaki (1993) obtained with their 1 mm-diameter circular test section, while large differences will be found between the present data and those of Damianides & Westwater (1988). The inconsistencies associated with the identified flow patterns, which can be inferred from the denominations of flow patterns used by different authors, may be part of the reasons resulting in these differences.…”

Section: Discussionsupporting

confidence: 88%

“…Studies generally confirm significant differences between capillaries and large channels, with respect to flow patterns (Suo & Griffith, 1964;Oya, 1971;Barnea et al, 1983;Damianides & Westwater, 1988;Fukano & Kariyasaki, 1993;Barajas & Panton, 1993;Triplett et al, 1999a;Bi et al, 1999), pressure drop (Inasaka et al, 1989;Lin et al, 1991;Fukano & Kariyasaki, 1993;Fouran & Bories, 1995;Triplett et al, 1999b), and boiling heat transfer and critical heat flux (Inasaka et al, 1989;Peng & Wang, 1993). Criteria for determining the maximum channel diameter for channel orientationindependent (or, equivalently, gravity-independent) flow have also been proposed by Suo & Griffith (1964), Brauner (1990), Brauner & Moalem-Maron (1990, 1992, and Fukano & Kariyasaki (1993). found that the gravity-independent criterion developed on the base of the experiments of two-phase gas-liquid flows at different gravity conditions aboard the Russian Mir Space Station is the same as that proposed by Brauner & Moalem-Maron (1992), namely the Bond number is no more than a critical value of an order of 1.…”

Section: Introductionmentioning

confidence: 90%

See 1 more Smart Citation

Two-Phase Flow Patterns in a Square Micro-Channel

Zhao

2003

1st International Conference on Microchannels and Minichannels

View full text Add to dashboard Cite

A new set of experimental data of two-phase air-water flow patterns in a square micro-channel is presented. The channel has a cross-section of 1×1 mm 2 and a length of 300 mm. The ranges of the gas and liquid superficial velocities are 0.1-10 m/s and 0.2-7 m/s, respectively. Bubble, bubbleslug transitional, slug, and frothy patterns are observed. The present data are compared with other experimental data reported in the literature, and a good agreement is obtained. It is also compared the present data with those obtained from reduced gravity experiments, in which the Bond number has the same order of magnitude. Some problems associated with the micro-scale modeling of microgravity two-phase flow are also discussed.

show abstract

Section: Discussionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 90%

Two-Phase Flow Patterns in a Square Micro-Channel

Zhao

2003

1st International Conference on Microchannels and Minichannels

View full text Add to dashboard Cite

show abstract

“…Chaoqun et al (5) 의 경우는 속도가 높게 예측이 되었고, Yue et al (9) 의 경우는 수력직경이 600 ㎛인 경우에 대해 식(11) 의   의 값을 0.8로 두고 적용하여 비교적 잘 예측이 됨을 확인하였다. Chaoqun et al (5) 의 경우 수력직경이 약 400 ㎛로 본 연구에서 사용한 유로보다 작으며, 유 로의 직경이 감소함(Yue et al (9) 과 Fukano and Kariyasaki (12) )에 따라   의 값이 증가하는 경향에 의해 예측 의 오차가 발생한 것으로 사료된다. …”

Section: 기포 속도 모델 적용 결과unclassified

Study on the Characteristics of Bubble and Liquid Slugs for Gas-Liquid Taylor Flow in a Rectangular Micro-channel

Lee¹,

Lee²

2015

Korean Journal of Air-Conditioning and Refrigeration Engineerin

View full text Add to dashboard Cite

The characteristics of gas-liquid Taylor (Slug) flow in a square micro-channel of 600×600 ㎛ were investigated experimentally in this paper. The test fluids were nitrogen and water. The liquid and gas superficial velocities were 0.01 ～3 m/s and 0.1～3 m/s, respectively. Bubble and liquid slug length, bubble velocity, and frequency were measured by analyzing optical images using a high speed camera. Bubble length decreased with higher liquid flow rate, which increased dramatically with higher gas flow rate. However, slug length did not vary with changes in inlet liquid conditions. Additionally, bubble velocities and frequencies increased with higher liquid and gas flow rates. It was found that measured bubble lengths were in good agreement with the empirical models in the existing literature, but slug lengths were not.Key words Micro-channel(미세관), Two-phase flow(2상 유동), Taylor flow(Taylor 유동), Bubble(기포), Slug(슬러그) †Corresponding author, E-mail: jklee99@kyungnam.ac.kr (Fig. 1).기존의 Taylor 유동과 관련한 많은 연구들이 Taylor 기포의 길이를 측정하고 여러 가지 입구조건에 대해 길이를 예측하는 데에 집중되어 있는데, 유로에서의 압 력강하와 물질전달 등을 결정하는데 중요한 인자가 되 기 때문이다. 기포 길이에 대한 기존 연구에 대해, 기 포가 유로를 대부분 채워서 흐르는 Taylor flow가 주로 발생하는 Ca 수(  )가 작은 경우에 대해(sq-

show abstract

“…But flow boiling due to extraction of latent heat component can dissipate heat without increase in temperature. Also, single phase heat transfer coefficient for laminar flow of water in a 200 μm square channel is around 0.1 MW/m 2 -°C, whereas flow boiling heat transfer coefficient can exceed 1 MW/m 2 -°C making two phase flow more attractive for cooling of electronic devices " [6][7][8][9][10]". In the present study, TH-HEM model has been adopted for two phase flow through micro channel.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Two Phase Flow Boiling Heat Transfer through Micro-Channel

Singh¹,

Rai²,

Shukla³

2017

IJERT

View full text Add to dashboard Cite

-Day by day rapid miniaturization of electronics devices in electronic industry have resulted in continuous raise of heat removal requirements for making the more efficient the electronic devices, thereby making a call for highly thermal efficient cooling technology. Two phase flow boiling heat transfer is the one of the potential solution for heat dissipation for electronic devices. For highly efficient performance and reliability of micro-electronic and mechanical systems (MEMS) devices, the working temperate should be keep below some specific temperature less than 90 °C. The purpose of the work is to develop a numerical model to predict the behaviour of two phase forced convection in micro-channels using de-ionize water (DIW) as the coolant with uniform heat flux in laminar and turbulent flow regime. A 1-D thermal-hydraulic -homogeneous equilibrium model (TH-HEM), consisting of mass, momentum and energy conservation equations and empirical correlation for laminar and turbulent flow, and properties of substance equation as dryness fraction relation with liquid and vapour density, are solved numerically using a finite-difference upwind scheme for single as well as two phase flow and algebraic equations. Finally, the TH-HEM model is used to evaluate the location of boiling front, it's variation with uniform input power, Variation in dryness fraction in two phase region, pressure distribution of fluid along the axial length, wall and fluid temperature distribution along the axial length, for one fixed inlet temperature and fixed outlet pressure condition.

show abstract

Characteristics of gas-liquid two-phase flow in a capillary tube

Cited by 249 publications

References 11 publications

Two-Phase Flow Patterns in a Square Micro-Channel

Two-Phase Flow Patterns in a Square Micro-Channel

Study on the Characteristics of Bubble and Liquid Slugs for Gas-Liquid Taylor Flow in a Rectangular Micro-channel

Numerical Analysis of Two Phase Flow Boiling Heat Transfer through Micro-Channel

Contact Info

Product

Resources

About