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On the dynamics and heat transfer of bubble train in micro-channel flow boiling
KTH, Skolan för industriell teknik och management (ITM), Energiteknik, Tillämpad termodynamik och kylteknik.
KTH, Skolan för industriell teknik och management (ITM), Energiteknik.
KTH, Skolan för industriell teknik och management (ITM), Energiteknik, Tillämpad termodynamik och kylteknik.
Vise andre og tillknytning
2017 (engelsk)Inngår i: International Communications in Heat and Mass Transfer, ISSN 0735-1933, E-ISSN 1879-0178, Vol. 87, s. 198-203Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The dynamics and heat transfer characteristics of flow boiling bubble train moving in a micro channel is studied numerically. The coupled level set and volume of fluid (CLSVOF) is utilized to track interface and a non-equilibrium phase change model is applied to calculate the interface temperature as well as heat flux jump. The working fluid is R134a and the wall material is aluminum. The fluid enters the channel with a constant mass flux (335 kg/m(2)*s), and the boundary wall is heated with constant heat flux (14 kW/m(2)). The growth of bubbles and the transition of flow regime are compared to an experimental visualization. Moreover, the bubble evaporation rate and wall heat transfer coefficient have been examined, respectively. Local heat transfer is significantly enhanced by evaporation occurring vicinity of interface of the bubbles. The local wall temperature is found to be dependent on the thickness of the liquid film between the bubble train and the wall.

sted, utgiver, år, opplag, sider
Elsevier, 2017. Vol. 87, s. 198-203
Emneord [en]
CFD, Boiling, Bubbles, Multi-phase flow, Micro-channels
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-217195DOI: 10.1016/j.icheatmasstransfer.2017.07.002ISI: 000413126100026Scopus ID: 2-s2.0-85027419329OAI: oai:DiVA.org:kth-217195DiVA, id: diva2:1154992
Forskningsfinansiär
Swedish Energy Agency
Merknad

QC 20171106

Tilgjengelig fra: 2017-11-06 Laget: 2017-11-06 Sist oppdatert: 2017-11-06bibliografisk kontrollert

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