THERMAL SCIENCE
International Scientific Journal
AN IMPROVED ALGEBRAIC MODEL FOR BY-PASS TRANSITION FOR CALCULATION OF TRANSITIONAL FLOW IN PIPE AND PARALLEL-PLATE CHANNELS
ABSTRACT
Modified algebraic intermittency model developed by E. Dick and S. Kubacki was used to describe laminar-turbulent transition. In this work a modification of this model was made for simulating internal flows in pipes and parallel-plate channel. In particular, constants present in this model were modified. These modified constants are the same for different flows in pipes and parallel-plate channels. In this work, a dependence of friction factor on Reynolds number and turbulence intensity were determined as well as the localization of laminar breakdown and fully developed flow. Obtained results were compared with theoretical and experimental data presented in the literature.
KEYWORDS
PAPER SUBMITTED: 2018-12-06
PAPER REVISED: 2019-01-05
PAPER ACCEPTED: 2019-01-24
PUBLISHED ONLINE: 2019-09-22
THERMAL SCIENCE YEAR
2019, VOLUME
23, ISSUE
Supplement 4, PAGES [S1123 - S1131]
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