This study clarifies the effects of small strain on the decay of homogeneous turbulence by focusing on the temporal profile of the small strain. Small strain is defined in such a way as to not affect the anisotropy of the homogeneous turbulence. We apply the framework of the standard k-ϵ model to examine the effects of small strain. Constant and linearly varying small strains are studied. The effects of linearly varying small strain are found to be greater than those of constant strain. To discuss the results, we derive an analytical solution that describes the effects of the two types of small strain. Although the form of the analytical solutions is the same for constant and linearly varying strains, the coefficients used in the analytical solutions, for which an equation is also obtained, differ. The difference observed in the effects of the two types of small strain is thus caused by the difference in coefficient.
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - Jul 26 2018|
|Event||1st International Conference on Physics, Mathematics and Statistics, ICPMS 2018 - Shanghai, China|
Duration: May 12 2018 → May 14 2018
ASJC Scopus subject areas
- Physics and Astronomy(all)