Numerical simulation of continuous bubbles motion behavior with different lance spacings
نویسندگان
چکیده
The lance is a critical component of the bottom-blowing pool melting process, and its placement has an important impact on pool?s gas-liquid two-phase flow. In this study, mathematical model process established, flow pattern, trajectory, wake vortex, velocity bubbles under four spacings are simulated. Results show that there three basic bubble patterns appear in field: coalesce before leaving nozzle (Pattern I), after II), no coalescence during rise III). pattern varies from Pattern I to III with increase spacing. intensity influence vortex decreases. Q (The second Galilean invariant gradient tensor ?v.) value small, but structural distribution complex. Moreover, large difference between gas liquid at beginning injection, them decreases so average turbulent kinetic energy initially increases sharply, then approaches dynamic equilibrium. top bottom velocities consistent, fluctuation orderly. greater spacing is, disturbance is. mixing effect D = 0.2 m best among spacings.
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ژورنال
عنوان ژورنال: Thermal Science
سال: 2022
ISSN: ['0354-9836', '2334-7163']
DOI: https://doi.org/10.2298/tsci220813204t