Large Eddy Simulation of Hot and Cold Fluids Mixing in a T-Junction for Prediction of Thermal Fluctuations

ZHU Wei-yu; LU Tao; JIANG Pei-xue; GUO Zhi-jun; WANG Kui-sheng

doi:10.3879/j.issn.1000-0887.2009.11.004

Volume 30 Issue 11

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ZHU Wei-yu, LU Tao, JIANG Pei-xue, GUO Zhi-jun, WANG Kui-sheng. Large Eddy Simulation of Hot and Cold Fluids Mixing in a T-Junction for Prediction of Thermal Fluctuations[J]. Applied Mathematics and Mechanics, 2009, 30(11): 1295-1306. doi: 10.3879/j.issn.1000-0887.2009.11.004

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Large Eddy Simulation of Hot and Cold Fluids Mixing in a T-Junction for Prediction of Thermal Fluctuations

doi: 10.3879/j.issn.1000-0887.2009.11.004

1.
School of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China;

Received Date: 2008-03-03
Rev Recd Date: 2009-09-10
Publish Date: 2009-11-15

Abstract

Abstract

The temperature fluctuations in a mixing T-junction have been smiulated on the FLUENT platform using the large eddy simulation (LES) turbulent flow model with a sub-grid scale Smagorinsky-Lilly model. The normalized mean and root mean square temperatures, which are used to describe the time-averaged temperature and temperature fluctuation intensity, were obtained, as well as velocity. The power spectral densities of temperature fluctuations, which are key parameters for thermal fatigue analysis and life tmie evaluation, were analyzed. The simulation results were consistent with expermiental data published in the literature, which shows that the LES is reliable. Severalmixing processes under different conditions were smiulated in order to analyze the effects of varying Reynolds number (Re) and Richardson number (Ri) on the mixing course and thermal fluctuations.
- numerical simulation,
- thermal fluctuation,
- T-junction

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References(19)

References

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