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Inert Large-Eddy Simulation of Opposing Jets in a Cross-Flow at TKK

This study investigates the dynamics of multiple opposing jets in a cross-flow utilizing inert large-eddy simulation in the 'Osbourne' reactor model. Initial mesh configurations presented challenges, including inadequate inlet boundary conditions and excessive proximity to the jets. The flow characteristics demonstrated a large range of scales, complicating computations that ultimately crashed after a month of processing with 30 processors. Observations indicate asymmetric flow behavior and backflow at the outlet, necessitating adjustments to mesh settings and outlet length to further explore the jet-flow interaction.

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Inert Large-Eddy Simulation of Opposing Jets in a Cross-Flow at TKK

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  1. Multiple opposing jets in a cross-flow at TKK • Inert large-eddy simulation of 'Osbourne' reactor • First mesh far too small, inlet BC unknown and too close to the jets • Cross-flow probably closer to the jet than fully developed flow .4 m 2 m .6 m .6 m • Also the outlet lengt increased from .45 m to 1 m • Backflow exists at the outlet

  2. Multiple opposing jets in a cross-flow at TKK • The current mesh includes 4 million control volumes • The flow possesses large range of scale -> a challenging case • The cross-flow is slow compared to the jet flow • Crash after one month of computation with 30 processors !

  3. Multiple opposing jets in a cross-flow at TKK • No fully converged results obtained yet • The flow appears to become asymmetric

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