THERMAL SCIENCE

International Scientific Journal

Shouguang Yao

,

Tao Huang

,

Kai Zhao

,

Jianbang Zeng

,

Shuhua Wang

SIMULATION OF FLOW BOILING OF NANOFLUID IN TUBE BASED ON LATTICE BOLTZMANN MODEL

ABSTRACT
In this study, a lattice Boltzmann model of bubble flow boiling in a tube is established. The bubble growth, integration, and departure of 3% Al2O3-water nanofluid in the process of flow boiling are selected to simulate. The effects of different bubble distances and lateral accelerations a on the bubble growth process and the effect of heat transfer are investigated. Results showed that with an increase in the bubble distance, the bubble coalescence and the effect of heat transfer become gradual. With an increase in lateral acceleration a, the bubble growth is different. When a = 0.5e–7 and a = 0.5e–6, the bubble growth includes the process of bubble growth, coalescence, detachment, and fusion with the top bubble and when a = 0.5e–5 and a = 0.5e–4, the bubbles only experience growth and fusion, and the bubbles do not merge with the top bubble directly to the right movement because the lateral acceleration is too large, resulting in the enhanced effect of heat transfer in the tube.
KEYWORDS
nanofluids, tube, Lattice Boltzmann Method, flow boiling
PAPER SUBMITTED: 2016-08-17
PAPER REVISED: 2016-11-28
PAPER ACCEPTED: 2017-01-06
PUBLISHED ONLINE: 2017-02-12
DOI REFERENCE: https://doi.org/10.2298/TSCI160817006Y
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2019, VOLUME 23, ISSUE Issue 1, PAGES [159 - 168]
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Simulation of flow boiling of nanofluid in tube based on lattice Boltzmann model

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